Passing parameters between form classes - C#

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

I'm a rookie at C# and OO so please don't laugh! I have a form
(fclsTaxCalculator) that contains a text box (tboxZipCode) containing a zip
code. The user can enter a zip code in the text box and click a button to
determine whether the zip code is unique. If the zip code is not unique,
another form/dialog is displayed (fclsLookup) - lookup form/dialog. The zip
code is passed to the lookup form/dialog by reference. I then load a
datagrid with the possible matches (i.e. zip, city, county, state, zipid).
When the user clicks the row in the datagrid, I want to pass the zipid back
to the original form/dialog and run a stored procedure. My problem is I do
not know how to get the ZipId back to the fclsTaxCalculator form/dialog.
I've search for examples of this and I've not been able to track one down -
please help!!!
 
Johnny said:
I'm a rookie at C# and OO so please don't laugh!
Click to expand...

We won't. This is a C++ group. Try posting in

microsoft.public.dotnet.languages.csharp

Regards,
Will
 
Hello !

There are no stupid questions.

The forms you define in C# always consist of a class. A single form is a
single class. Thus, your problem comes from the interaction between classes.
You already knew this, however.

So, in addition to passing a reference variable to the zip code the user has
entered (the one which you wish to check), pass in another reference to the
ACTUAL zip code returned by the lookup form. Now, when the lookup form is
launched, you use the first reference to pass in the zipcode and initialize
the datagrid to show possible values, and the second reference to pass back
the value which the user clicked on in the datagrid.

Here's the most simplest example I can think of. It's written in C++, but
the language syntax is pretty much similar in C#.

class MyForm1
{
public:
int m_nUsersZipCode;
int m_nDatagridResult;
MyForm2* m_pLookupForm;
};

class MyForm2
{
public:
DWORD ValidateZipCode(int& nRefSource, int& nRefSelected);
};

int main(void)
{
MyForm1 form1;
MyForm2 form2;
form1.Show();
}

// In the ShowLookupForm handler of MyForm1
..
m_pLookupForm->ValidateZipCode( m_nUsersZipCode,
m_nDatagridResult );
..

This would be the most simplistic way to accomplish it. The problem itself
is not C# related by nature, thus it's quite easy to answer it.

-Antti Keskinen
 
Antti,

I really appreciate the feedback. I should have stated the fact that I am
passing two variables by reference but I don't know how to set the variable
that I pass to the second form to the value selected in the second form.
When I try to set the variable. I get a message from the compiler that
states the varaible does not exist in the namespace. My code is below.

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;

namespace EnspireUtilities
{
/// <summary>
/// Summary description for Lookup.
/// </summary>
public class fclsLookup : System.Windows.Forms.Form
{
private System.Data.SqlClient.SqlDataAdapter sqlDataAdapter1;
private System.Data.SqlClient.SqlCommand sqlSelectCommand1;
private System.Data.SqlClient.SqlConnection sqlConnection1;
private EnspireUtilities.dsLookup dsLookup1;
private System.Windows.Forms.DataGrid dataGrid1;
private System.Windows.Forms.Button btnLoad;
private System.Windows.Forms.TextBox tboxLookupZipCode;
private System.Windows.Forms.Label lblLookupParameter;
private System.Windows.Forms.Button btnOK;
private System.Windows.Forms.Button btnCancel;
//private string strZipCode = string.Empty;
private System.Windows.Forms.DataGridTableStyle dataGridTableStyle1;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn1;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn2;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn3;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn4;
public string strZipCode = String.Empty;
public string strZipCodeDtlId = String.Empty;


/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public fclsLookup(ref string ZipCode, ref string ZipCodeDtlId)
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
//tboxLookupZipCode.Text = ZipCode;
sqlSelectCommand1.Parameters["@zip"].Value = ZipCode;
dsLookup1.Clear();
sqlDataAdapter1.Fill(dsLookup1);
strZipCode = ZipCode;
strZipCodeDtlId = ZipCodeDtlId;
tboxLookupZipCode.Text = strZipCode;
this.dataGrid1.MouseDown += new
System.Windows.Forms.MouseEventHandler(this.dataGrid1_MouseDown);

}

/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.sqlDataAdapter1 = new System.Data.SqlClient.SqlDataAdapter();
this.sqlSelectCommand1 = new System.Data.SqlClient.SqlCommand();
this.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
this.dsLookup1 = new EnspireUtilities.dsLookup();
this.dataGrid1 = new System.Windows.Forms.DataGrid();
this.dataGridTableStyle1 = new System.Windows.Forms.DataGridTableStyle();
this.dataGridTextBoxColumn1 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.dataGridTextBoxColumn2 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.dataGridTextBoxColumn3 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.dataGridTextBoxColumn4 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.btnLoad = new System.Windows.Forms.Button();
this.tboxLookupZipCode = new System.Windows.Forms.TextBox();
this.lblLookupParameter = new System.Windows.Forms.Label();
this.btnOK = new System.Windows.Forms.Button();
this.btnCancel = new System.Windows.Forms.Button();
((System.ComponentModel.ISupportInitialize)(this.dsLookup1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
this.SuspendLayout();
//
// sqlDataAdapter1
//
this.sqlDataAdapter1.SelectCommand = this.sqlSelectCommand1;
this.sqlDataAdapter1.TableMappings.AddRange(new
System.Data.Common.DataTableMapping[] {
new System.Data.Common.DataTableMapping("Table",
"p_getZipCodeData", new System.Data.Common.DataColumnMapping[] {
new
System.Data.Common.DataColumnMapping("zip", "zip"),
new
System.Data.Common.DataColumnMapping("city", "city"),
new
System.Data.Common.DataColumnMapping("county", "county"),
new
System.Data.Common.DataColumnMapping("state", "state"),
new
System.Data.Common.DataColumnMapping("zip_code_dtl_id",
"zip_code_dtl_id")})});
//
// sqlSelectCommand1
//
this.sqlSelectCommand1.CommandText = "[p_getZipCodeData]";
this.sqlSelectCommand1.CommandType =
System.Data.CommandType.StoredProcedure;
this.sqlSelectCommand1.Connection = this.sqlConnection1;
this.sqlSelectCommand1.Parameters.Add(new
System.Data.SqlClient.SqlParameter("@RETURN_VALUE",
System.Data.SqlDbType.Int, 4, System.Data.ParameterDirection.ReturnValue,
false, ((System.Byte)(0)), ((System.Byte)(0)), "",
System.Data.DataRowVersion.Current, null));
this.sqlSelectCommand1.Parameters.Add(new
System.Data.SqlClient.SqlParameter("@zip", System.Data.SqlDbType.VarChar,
10));
//
// sqlConnection1
//
this.sqlConnection1.ConnectionString = "workstation id=CENGENXP2;packet
size=4096;user id=sa;data source=cengenxp2;persis" +
"t security info=True;initial catalog=src;password=cocacola";
//
// dsLookup1
//
this.dsLookup1.DataSetName = "dsLookup";
this.dsLookup1.Locale = new System.Globalization.CultureInfo("en-US");
//
// dataGrid1
//
this.dataGrid1.DataMember = "p_getZipCodeData";
this.dataGrid1.DataSource = this.dsLookup1;
this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dataGrid1.Location = new System.Drawing.Point(0, 40);
this.dataGrid1.Name = "dataGrid1";
this.dataGrid1.Size = new System.Drawing.Size(568, 288);
this.dataGrid1.TabIndex = 0;
this.dataGrid1.TableStyles.AddRange(new
System.Windows.Forms.DataGridTableStyle[] {
this.dataGridTableStyle1});
this.dataGrid1.Navigate += new
System.Windows.Forms.NavigateEventHandler(this.dataGrid1_Navigate);
//
// dataGridTableStyle1
//
this.dataGridTableStyle1.DataGrid = this.dataGrid1;
this.dataGridTableStyle1.GridColumnStyles.AddRange(new
System.Windows.Forms.DataGridColumnStyle[] {
this.dataGridTextBoxColumn1,
this.dataGridTextBoxColumn2,
this.dataGridTextBoxColumn3,
this.dataGridTextBoxColumn4});
this.dataGridTableStyle1.HeaderForeColor =
System.Drawing.SystemColors.ControlText;
this.dataGridTableStyle1.MappingName = "p_getZipCodeData";
//
// dataGridTextBoxColumn1
//
this.dataGridTextBoxColumn1.Format = "";
this.dataGridTextBoxColumn1.FormatInfo = null;
this.dataGridTextBoxColumn1.HeaderText = "Zip Code";
this.dataGridTextBoxColumn1.MappingName = "zip";
this.dataGridTextBoxColumn1.Width = 75;
//
// dataGridTextBoxColumn2
//
this.dataGridTextBoxColumn2.Format = "";
this.dataGridTextBoxColumn2.FormatInfo = null;
this.dataGridTextBoxColumn2.HeaderText = "City";
this.dataGridTextBoxColumn2.MappingName = "city";
this.dataGridTextBoxColumn2.Width = 75;
//
// dataGridTextBoxColumn3
//
this.dataGridTextBoxColumn3.Format = "";
this.dataGridTextBoxColumn3.FormatInfo = null;
this.dataGridTextBoxColumn3.HeaderText = "County";
this.dataGridTextBoxColumn3.MappingName = "county";
this.dataGridTextBoxColumn3.Width = 75;
//
// dataGridTextBoxColumn4
//
this.dataGridTextBoxColumn4.Format = "";
this.dataGridTextBoxColumn4.FormatInfo = null;
this.dataGridTextBoxColumn4.HeaderText = "State";
this.dataGridTextBoxColumn4.MappingName = "state";
this.dataGridTextBoxColumn4.Width = 75;
//
// btnLoad
//
this.btnLoad.Location = new System.Drawing.Point(472, 8);
this.btnLoad.Name = "btnLoad";
this.btnLoad.TabIndex = 2;
this.btnLoad.Text = "Load";
this.btnLoad.Click += new System.EventHandler(this.btnLoad_Click);
//
// tboxLookupZipCode
//
this.tboxLookupZipCode.Location = new System.Drawing.Point(136, 8);
this.tboxLookupZipCode.Name = "tboxLookupZipCode";
this.tboxLookupZipCode.Size = new System.Drawing.Size(200, 20);
this.tboxLookupZipCode.TabIndex = 1;
this.tboxLookupZipCode.Text = "";
//
// lblLookupParameter
//
this.lblLookupParameter.Location = new System.Drawing.Point(24, 8);
this.lblLookupParameter.Name = "lblLookupParameter";
this.lblLookupParameter.Size = new System.Drawing.Size(100, 20);
this.lblLookupParameter.TabIndex = 3;
this.lblLookupParameter.Text = "Zip Code";
this.lblLookupParameter.TextAlign =
System.Drawing.ContentAlignment.MiddleRight;
//
// btnOK
//
this.btnOK.DialogResult = System.Windows.Forms.DialogResult.OK;
this.btnOK.Location = new System.Drawing.Point(378, 352);
this.btnOK.Name = "btnOK";
this.btnOK.TabIndex = 3;
this.btnOK.Text = "OK";
this.btnOK.Click += new System.EventHandler(this.btnOK_Click);
//
// btnCancel
//
this.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
this.btnCancel.Location = new System.Drawing.Point(472, 352);
this.btnCancel.Name = "btnCancel";
this.btnCancel.TabIndex = 4;
this.btnCancel.Text = "Cancel";
this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
//
// fclsLookup
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(568, 390);
this.Controls.Add(this.btnCancel);
this.Controls.Add(this.btnOK);
this.Controls.Add(this.lblLookupParameter);
this.Controls.Add(this.tboxLookupZipCode);
this.Controls.Add(this.btnLoad);
this.Controls.Add(this.dataGrid1);
this.Name = "fclsLookup";
this.Text = "Lookup";
((System.ComponentModel.ISupportInitialize)(this.dsLookup1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
this.ResumeLayout(false);

}
#endregion


private void btnLoad_Click(object sender, System.EventArgs e)
{
sqlSelectCommand1.Parameters["@zip"].Value = tboxLookupZipCode.Text;
dsLookup1.Clear();
sqlDataAdapter1.Fill(dsLookup1);
}

private void btnOK_Click(object sender, System.EventArgs e)
{

Close();
}

private void btnCancel_Click(object sender, System.EventArgs e)
{
Close();
}

private void dataGrid1_Navigate(object sender,
System.Windows.Forms.NavigateEventArgs ne)
{

Close();
}

protected void dataGrid1_MouseDown(object sender,
System.Windows.Forms.MouseEventArgs e)
{
string strMessage = "TEST";

//strMessage = "Row: " + dataGrid1.HitTest(e.X,e.Y).Row.ToString();
int x = dataGrid1.HitTest(e.X, e.Y).Row;

strZipCode = dataGrid1[x, 0].ToString();
strZipCodeDtlId = dataGrid1[x, 3].ToString();
MessageBox.Show(strZipCode);
MessageBox.Show("I still don't know what I'm doing, but I'm at " +
strMessage + ". I need to send back " + strZipCode);
}

}
}
 
Hi !

I've solved the case, but this approach has it's limits. First of, it does
NOT use references. Second, it requires that while the lookup form is
visible, the user cannot do anything else with the first form. Thirdly, it's
not very object-oriented.

In the fclsLookup class, make sure you have the following variables:

private System.String m_strSource = String.Empty; // Zip Code passed by the
first form
public System.String m_strDestination = String.Empty; // Returns the
results of the lookup

Change fclsLookup's constructor to this:

public fclsLookup(string SourceZipCode)
{
InitializeComponent();

m_strSource = SourceZipCode; // Get the source zip code

/* Rest of this function's code goes here as normal */
}

In the click handler, do this:

protected void dataGrid1_MouseDown(object sender,
System.Windows.Forms.MouseEventArgs e)
{
// Hit testing
int x = dataGrid1.HitTest(e.X, e.Y).Row;

// This is the value passed back to the first form
m_strDestination = dataGrid1[x,0].ToString();
}

In the first form, where you create and show the lookup form, make sure it
looks something like this:
Also, note the order in which the methods are called. This is very
important.

private void ShowLookup_Click( object sender, System.EventArgs e )
{
// Launch the second form (sourceZip is a control which takes the zip
code)
fclsLookup Form2 = new fclsLookup( sourceZip.Text );

// Display a modal version of the second form. Execution of this
function stops here until the lookup form
// is closed.
Form2.ShowDialog();

// After the form has been closed, execution continues.
// When we are here, the click handler in the second form has updated
the
// internal value m_strDestination, so we can copy it out
System.String strReturnValue = objForm2.m_strDestination;

// Use strReturnValue to display the lookup result information.
}

This is the only approach I could fathom. It seems that the idea of
'reference variables' that exists in C++ is a completely unknown feature in
C#. In C#, you can only have reference variables that live inside a method.
Reference variables inside a class are an unknown concept altogether. This
is clearly a limitation of the language, and a one more reason to stick to
C++ or C++/CLI, when it's finished.

-Antti Keskinen


Johnny said:
Antti,

I really appreciate the feedback. I should have stated the fact that I am
passing two variables by reference but I don't know how to set the
variable
that I pass to the second form to the value selected in the second form.
When I try to set the variable. I get a message from the compiler that
states the varaible does not exist in the namespace. My code is below.

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;

namespace EnspireUtilities
{
/// <summary>
/// Summary description for Lookup.
/// </summary>
public class fclsLookup : System.Windows.Forms.Form
{
private System.Data.SqlClient.SqlDataAdapter sqlDataAdapter1;
private System.Data.SqlClient.SqlCommand sqlSelectCommand1;
private System.Data.SqlClient.SqlConnection sqlConnection1;
private EnspireUtilities.dsLookup dsLookup1;
private System.Windows.Forms.DataGrid dataGrid1;
private System.Windows.Forms.Button btnLoad;
private System.Windows.Forms.TextBox tboxLookupZipCode;
private System.Windows.Forms.Label lblLookupParameter;
private System.Windows.Forms.Button btnOK;
private System.Windows.Forms.Button btnCancel;
//private string strZipCode = string.Empty;
private System.Windows.Forms.DataGridTableStyle dataGridTableStyle1;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn1;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn2;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn3;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn4;
public string strZipCode = String.Empty;
public string strZipCodeDtlId = String.Empty;


/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public fclsLookup(ref string ZipCode, ref string ZipCodeDtlId)
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
//tboxLookupZipCode.Text = ZipCode;
sqlSelectCommand1.Parameters["@zip"].Value = ZipCode;
dsLookup1.Clear();
sqlDataAdapter1.Fill(dsLookup1);
strZipCode = ZipCode;
strZipCodeDtlId = ZipCodeDtlId;
tboxLookupZipCode.Text = strZipCode;
this.dataGrid1.MouseDown += new
System.Windows.Forms.MouseEventHandler(this.dataGrid1_MouseDown);

}

/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.sqlDataAdapter1 = new System.Data.SqlClient.SqlDataAdapter();
this.sqlSelectCommand1 = new System.Data.SqlClient.SqlCommand();
this.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
this.dsLookup1 = new EnspireUtilities.dsLookup();
this.dataGrid1 = new System.Windows.Forms.DataGrid();
this.dataGridTableStyle1 = new System.Windows.Forms.DataGridTableStyle();
this.dataGridTextBoxColumn1 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.dataGridTextBoxColumn2 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.dataGridTextBoxColumn3 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.dataGridTextBoxColumn4 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.btnLoad = new System.Windows.Forms.Button();
this.tboxLookupZipCode = new System.Windows.Forms.TextBox();
this.lblLookupParameter = new System.Windows.Forms.Label();
this.btnOK = new System.Windows.Forms.Button();
this.btnCancel = new System.Windows.Forms.Button();
((System.ComponentModel.ISupportInitialize)(this.dsLookup1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
this.SuspendLayout();
//
// sqlDataAdapter1
//
this.sqlDataAdapter1.SelectCommand = this.sqlSelectCommand1;
this.sqlDataAdapter1.TableMappings.AddRange(new
System.Data.Common.DataTableMapping[] {
new System.Data.Common.DataTableMapping("Table",
"p_getZipCodeData", new System.Data.Common.DataColumnMapping[] {
new
System.Data.Common.DataColumnMapping("zip", "zip"),
new
System.Data.Common.DataColumnMapping("city", "city"),
new
System.Data.Common.DataColumnMapping("county", "county"),
new
System.Data.Common.DataColumnMapping("state", "state"),
new
System.Data.Common.DataColumnMapping("zip_code_dtl_id",
"zip_code_dtl_id")})});
//
// sqlSelectCommand1
//
this.sqlSelectCommand1.CommandText = "[p_getZipCodeData]";
this.sqlSelectCommand1.CommandType =
System.Data.CommandType.StoredProcedure;
this.sqlSelectCommand1.Connection = this.sqlConnection1;
this.sqlSelectCommand1.Parameters.Add(new
System.Data.SqlClient.SqlParameter("@RETURN_VALUE",
System.Data.SqlDbType.Int, 4, System.Data.ParameterDirection.ReturnValue,
false, ((System.Byte)(0)), ((System.Byte)(0)), "",
System.Data.DataRowVersion.Current, null));
this.sqlSelectCommand1.Parameters.Add(new
System.Data.SqlClient.SqlParameter("@zip", System.Data.SqlDbType.VarChar,
10));
//
// sqlConnection1
//
this.sqlConnection1.ConnectionString = "workstation id=CENGENXP2;packet
size=4096;user id=sa;data source=cengenxp2;persis" +
"t security info=True;initial catalog=src;password=cocacola";
//
// dsLookup1
//
this.dsLookup1.DataSetName = "dsLookup";
this.dsLookup1.Locale = new System.Globalization.CultureInfo("en-US");
//
// dataGrid1
//
this.dataGrid1.DataMember = "p_getZipCodeData";
this.dataGrid1.DataSource = this.dsLookup1;
this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dataGrid1.Location = new System.Drawing.Point(0, 40);
this.dataGrid1.Name = "dataGrid1";
this.dataGrid1.Size = new System.Drawing.Size(568, 288);
this.dataGrid1.TabIndex = 0;
this.dataGrid1.TableStyles.AddRange(new
System.Windows.Forms.DataGridTableStyle[] {
this.dataGridTableStyle1});
this.dataGrid1.Navigate += new
System.Windows.Forms.NavigateEventHandler(this.dataGrid1_Navigate);
//
// dataGridTableStyle1
//
this.dataGridTableStyle1.DataGrid = this.dataGrid1;
this.dataGridTableStyle1.GridColumnStyles.AddRange(new
System.Windows.Forms.DataGridColumnStyle[] {
this.dataGridTextBoxColumn1,
this.dataGridTextBoxColumn2,
this.dataGridTextBoxColumn3,
this.dataGridTextBoxColumn4});
this.dataGridTableStyle1.HeaderForeColor =
System.Drawing.SystemColors.ControlText;
this.dataGridTableStyle1.MappingName = "p_getZipCodeData";
//
// dataGridTextBoxColumn1
//
this.dataGridTextBoxColumn1.Format = "";
this.dataGridTextBoxColumn1.FormatInfo = null;
this.dataGridTextBoxColumn1.HeaderText = "Zip Code";
this.dataGridTextBoxColumn1.MappingName = "zip";
this.dataGridTextBoxColumn1.Width = 75;
//
// dataGridTextBoxColumn2
//
this.dataGridTextBoxColumn2.Format = "";
this.dataGridTextBoxColumn2.FormatInfo = null;
this.dataGridTextBoxColumn2.HeaderText = "City";
this.dataGridTextBoxColumn2.MappingName = "city";
this.dataGridTextBoxColumn2.Width = 75;
//
// dataGridTextBoxColumn3
//
this.dataGridTextBoxColumn3.Format = "";
this.dataGridTextBoxColumn3.FormatInfo = null;
this.dataGridTextBoxColumn3.HeaderText = "County";
this.dataGridTextBoxColumn3.MappingName = "county";
this.dataGridTextBoxColumn3.Width = 75;
//
// dataGridTextBoxColumn4
//
this.dataGridTextBoxColumn4.Format = "";
this.dataGridTextBoxColumn4.FormatInfo = null;
this.dataGridTextBoxColumn4.HeaderText = "State";
this.dataGridTextBoxColumn4.MappingName = "state";
this.dataGridTextBoxColumn4.Width = 75;
//
// btnLoad
//
this.btnLoad.Location = new System.Drawing.Point(472, 8);
this.btnLoad.Name = "btnLoad";
this.btnLoad.TabIndex = 2;
this.btnLoad.Text = "Load";
this.btnLoad.Click += new System.EventHandler(this.btnLoad_Click);
//
// tboxLookupZipCode
//
this.tboxLookupZipCode.Location = new System.Drawing.Point(136, 8);
this.tboxLookupZipCode.Name = "tboxLookupZipCode";
this.tboxLookupZipCode.Size = new System.Drawing.Size(200, 20);
this.tboxLookupZipCode.TabIndex = 1;
this.tboxLookupZipCode.Text = "";
//
// lblLookupParameter
//
this.lblLookupParameter.Location = new System.Drawing.Point(24, 8);
this.lblLookupParameter.Name = "lblLookupParameter";
this.lblLookupParameter.Size = new System.Drawing.Size(100, 20);
this.lblLookupParameter.TabIndex = 3;
this.lblLookupParameter.Text = "Zip Code";
this.lblLookupParameter.TextAlign =
System.Drawing.ContentAlignment.MiddleRight;
//
// btnOK
//
this.btnOK.DialogResult = System.Windows.Forms.DialogResult.OK;
this.btnOK.Location = new System.Drawing.Point(378, 352);
this.btnOK.Name = "btnOK";
this.btnOK.TabIndex = 3;
this.btnOK.Text = "OK";
this.btnOK.Click += new System.EventHandler(this.btnOK_Click);
//
// btnCancel
//
this.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
this.btnCancel.Location = new System.Drawing.Point(472, 352);
this.btnCancel.Name = "btnCancel";
this.btnCancel.TabIndex = 4;
this.btnCancel.Text = "Cancel";
this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
//
// fclsLookup
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(568, 390);
this.Controls.Add(this.btnCancel);
this.Controls.Add(this.btnOK);
this.Controls.Add(this.lblLookupParameter);
this.Controls.Add(this.tboxLookupZipCode);
this.Controls.Add(this.btnLoad);
this.Controls.Add(this.dataGrid1);
this.Name = "fclsLookup";
this.Text = "Lookup";
((System.ComponentModel.ISupportInitialize)(this.dsLookup1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
this.ResumeLayout(false);

}
#endregion


private void btnLoad_Click(object sender, System.EventArgs e)
{
sqlSelectCommand1.Parameters["@zip"].Value = tboxLookupZipCode.Text;
dsLookup1.Clear();
sqlDataAdapter1.Fill(dsLookup1);
}

private void btnOK_Click(object sender, System.EventArgs e)
{

Close();
}

private void btnCancel_Click(object sender, System.EventArgs e)
{
Close();
}

private void dataGrid1_Navigate(object sender,
System.Windows.Forms.NavigateEventArgs ne)
{

Close();
}

protected void dataGrid1_MouseDown(object sender,
System.Windows.Forms.MouseEventArgs e)
{
string strMessage = "TEST";

//strMessage = "Row: " + dataGrid1.HitTest(e.X,e.Y).Row.ToString();
int x = dataGrid1.HitTest(e.X, e.Y).Row;

strZipCode = dataGrid1[x, 0].ToString();
strZipCodeDtlId = dataGrid1[x, 3].ToString();
MessageBox.Show(strZipCode);
MessageBox.Show("I still don't know what I'm doing, but I'm at " +
strMessage + ". I need to send back " + strZipCode);
}

}
}

Antti Keskinen said:
Hello !

There are no stupid questions.

The forms you define in C# always consist of a class. A single form is a
single class. Thus, your problem comes from the interaction between
classes.
You already knew this, however.

So, in addition to passing a reference variable to the zip code the user
has
entered (the one which you wish to check), pass in another reference to
the
ACTUAL zip code returned by the lookup form. Now, when the lookup form is
launched, you use the first reference to pass in the zipcode and
initialize
the datagrid to show possible values, and the second reference to pass
back
the value which the user clicked on in the datagrid.

Here's the most simplest example I can think of. It's written in C++, but
the language syntax is pretty much similar in C#.

class MyForm1
{
public:
int m_nUsersZipCode;
int m_nDatagridResult;
MyForm2* m_pLookupForm;
};

class MyForm2
{
public:
DWORD ValidateZipCode(int& nRefSource, int& nRefSelected);
};

int main(void)
{
MyForm1 form1;
MyForm2 form2;
form1.Show();
}

// In the ShowLookupForm handler of MyForm1
..
m_pLookupForm->ValidateZipCode( m_nUsersZipCode,
m_nDatagridResult );
..

This would be the most simplistic way to accomplish it. The problem
itself
is not C# related by nature, thus it's quite easy to answer it.

-Antti Keskinen
Click to expand...
Click to expand...
 
Antti,

Thank you so much for the suggestion. It worked wonderfully!!!!!
I really appreciate this. I can accomplish what I've been trying to
accomplish.

Thanks,
Johnny

Antti Keskinen said:
Hi !

I've solved the case, but this approach has it's limits. First of, it does
NOT use references. Second, it requires that while the lookup form is
visible, the user cannot do anything else with the first form. Thirdly, it's
not very object-oriented.

In the fclsLookup class, make sure you have the following variables:

private System.String m_strSource = String.Empty; // Zip Code passed by the
first form
public System.String m_strDestination = String.Empty; // Returns the
results of the lookup

Change fclsLookup's constructor to this:

public fclsLookup(string SourceZipCode)
{
InitializeComponent();

m_strSource = SourceZipCode; // Get the source zip code

/* Rest of this function's code goes here as normal */
}

In the click handler, do this:

protected void dataGrid1_MouseDown(object sender,
System.Windows.Forms.MouseEventArgs e)
{
// Hit testing
int x = dataGrid1.HitTest(e.X, e.Y).Row;

// This is the value passed back to the first form
m_strDestination = dataGrid1[x,0].ToString();
}

In the first form, where you create and show the lookup form, make sure it
looks something like this:
Also, note the order in which the methods are called. This is very
important.

private void ShowLookup_Click( object sender, System.EventArgs e )
{
// Launch the second form (sourceZip is a control which takes the zip
code)
fclsLookup Form2 = new fclsLookup( sourceZip.Text );

// Display a modal version of the second form. Execution of this
function stops here until the lookup form
// is closed.
Form2.ShowDialog();

// After the form has been closed, execution continues.
// When we are here, the click handler in the second form has updated
the
// internal value m_strDestination, so we can copy it out
System.String strReturnValue = objForm2.m_strDestination;

// Use strReturnValue to display the lookup result information.
}

This is the only approach I could fathom. It seems that the idea of
'reference variables' that exists in C++ is a completely unknown feature in
C#. In C#, you can only have reference variables that live inside a method.
Reference variables inside a class are an unknown concept altogether. This
is clearly a limitation of the language, and a one more reason to stick to
C++ or C++/CLI, when it's finished.

-Antti Keskinen


Johnny said:
Antti,

I really appreciate the feedback. I should have stated the fact that I am
passing two variables by reference but I don't know how to set the
variable
that I pass to the second form to the value selected in the second form.
When I try to set the variable. I get a message from the compiler that
states the varaible does not exist in the namespace. My code is below.

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;

namespace EnspireUtilities
{
/// <summary>
/// Summary description for Lookup.
/// </summary>
public class fclsLookup : System.Windows.Forms.Form
{
private System.Data.SqlClient.SqlDataAdapter sqlDataAdapter1;
private System.Data.SqlClient.SqlCommand sqlSelectCommand1;
private System.Data.SqlClient.SqlConnection sqlConnection1;
private EnspireUtilities.dsLookup dsLookup1;
private System.Windows.Forms.DataGrid dataGrid1;
private System.Windows.Forms.Button btnLoad;
private System.Windows.Forms.TextBox tboxLookupZipCode;
private System.Windows.Forms.Label lblLookupParameter;
private System.Windows.Forms.Button btnOK;
private System.Windows.Forms.Button btnCancel;
//private string strZipCode = string.Empty;
private System.Windows.Forms.DataGridTableStyle dataGridTableStyle1;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn1;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn2;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn3;
private System.Windows.Forms.DataGridTextBoxColumn dataGridTextBoxColumn4;
public string strZipCode = String.Empty;
public string strZipCodeDtlId = String.Empty;


/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public fclsLookup(ref string ZipCode, ref string ZipCodeDtlId)
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
//tboxLookupZipCode.Text = ZipCode;
sqlSelectCommand1.Parameters["@zip"].Value = ZipCode;
dsLookup1.Clear();
sqlDataAdapter1.Fill(dsLookup1);
strZipCode = ZipCode;
strZipCodeDtlId = ZipCodeDtlId;
tboxLookupZipCode.Text = strZipCode;
this.dataGrid1.MouseDown += new
System.Windows.Forms.MouseEventHandler(this.dataGrid1_MouseDown);

}

/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.sqlDataAdapter1 = new System.Data.SqlClient.SqlDataAdapter();
this.sqlSelectCommand1 = new System.Data.SqlClient.SqlCommand();
this.sqlConnection1 = new System.Data.SqlClient.SqlConnection();
this.dsLookup1 = new EnspireUtilities.dsLookup();
this.dataGrid1 = new System.Windows.Forms.DataGrid();
this.dataGridTableStyle1 = new System.Windows.Forms.DataGridTableStyle();
this.dataGridTextBoxColumn1 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.dataGridTextBoxColumn2 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.dataGridTextBoxColumn3 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.dataGridTextBoxColumn4 = new
System.Windows.Forms.DataGridTextBoxColumn();
this.btnLoad = new System.Windows.Forms.Button();
this.tboxLookupZipCode = new System.Windows.Forms.TextBox();
this.lblLookupParameter = new System.Windows.Forms.Label();
this.btnOK = new System.Windows.Forms.Button();
this.btnCancel = new System.Windows.Forms.Button();
((System.ComponentModel.ISupportInitialize)(this.dsLookup1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
this.SuspendLayout();
//
// sqlDataAdapter1
//
this.sqlDataAdapter1.SelectCommand = this.sqlSelectCommand1;
this.sqlDataAdapter1.TableMappings.AddRange(new
System.Data.Common.DataTableMapping[] {
new System.Data.Common.DataTableMapping("Table",
"p_getZipCodeData", new System.Data.Common.DataColumnMapping[] {
new
System.Data.Common.DataColumnMapping("zip", "zip"),
new
System.Data.Common.DataColumnMapping("city", "city"),
new
System.Data.Common.DataColumnMapping("county", "county"),
new
System.Data.Common.DataColumnMapping("state", "state"),
new
System.Data.Common.DataColumnMapping("zip_code_dtl_id",
"zip_code_dtl_id")})});
//
// sqlSelectCommand1
//
this.sqlSelectCommand1.CommandText = "[p_getZipCodeData]";
this.sqlSelectCommand1.CommandType =
System.Data.CommandType.StoredProcedure;
this.sqlSelectCommand1.Connection = this.sqlConnection1;
this.sqlSelectCommand1.Parameters.Add(new
System.Data.SqlClient.SqlParameter("@RETURN_VALUE",
System.Data.SqlDbType.Int, 4, System.Data.ParameterDirection.ReturnValue,
false, ((System.Byte)(0)), ((System.Byte)(0)), "",
System.Data.DataRowVersion.Current, null));
this.sqlSelectCommand1.Parameters.Add(new
System.Data.SqlClient.SqlParameter("@zip", System.Data.SqlDbType.VarChar,
10));
//
// sqlConnection1
//
this.sqlConnection1.ConnectionString = "workstation id=CENGENXP2;packet
size=4096;user id=sa;data source=cengenxp2;persis" +
"t security info=True;initial catalog=src;password=cocacola";
//
// dsLookup1
//
this.dsLookup1.DataSetName = "dsLookup";
this.dsLookup1.Locale = new System.Globalization.CultureInfo("en-US");
//
// dataGrid1
//
this.dataGrid1.DataMember = "p_getZipCodeData";
this.dataGrid1.DataSource = this.dsLookup1;
this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dataGrid1.Location = new System.Drawing.Point(0, 40);
this.dataGrid1.Name = "dataGrid1";
this.dataGrid1.Size = new System.Drawing.Size(568, 288);
this.dataGrid1.TabIndex = 0;
this.dataGrid1.TableStyles.AddRange(new
System.Windows.Forms.DataGridTableStyle[] {
this.dataGridTableStyle1});
this.dataGrid1.Navigate += new
System.Windows.Forms.NavigateEventHandler(this.dataGrid1_Navigate);
//
// dataGridTableStyle1
//
this.dataGridTableStyle1.DataGrid = this.dataGrid1;
this.dataGridTableStyle1.GridColumnStyles.AddRange(new
System.Windows.Forms.DataGridColumnStyle[] {
this.dataGridTextBoxColumn1,
this.dataGridTextBoxColumn2,
this.dataGridTextBoxColumn3,
this.dataGridTextBoxColumn4});
this.dataGridTableStyle1.HeaderForeColor =
System.Drawing.SystemColors.ControlText;
this.dataGridTableStyle1.MappingName = "p_getZipCodeData";
//
// dataGridTextBoxColumn1
//
this.dataGridTextBoxColumn1.Format = "";
this.dataGridTextBoxColumn1.FormatInfo = null;
this.dataGridTextBoxColumn1.HeaderText = "Zip Code";
this.dataGridTextBoxColumn1.MappingName = "zip";
this.dataGridTextBoxColumn1.Width = 75;
//
// dataGridTextBoxColumn2
//
this.dataGridTextBoxColumn2.Format = "";
this.dataGridTextBoxColumn2.FormatInfo = null;
this.dataGridTextBoxColumn2.HeaderText = "City";
this.dataGridTextBoxColumn2.MappingName = "city";
this.dataGridTextBoxColumn2.Width = 75;
//
// dataGridTextBoxColumn3
//
this.dataGridTextBoxColumn3.Format = "";
this.dataGridTextBoxColumn3.FormatInfo = null;
this.dataGridTextBoxColumn3.HeaderText = "County";
this.dataGridTextBoxColumn3.MappingName = "county";
this.dataGridTextBoxColumn3.Width = 75;
//
// dataGridTextBoxColumn4
//
this.dataGridTextBoxColumn4.Format = "";
this.dataGridTextBoxColumn4.FormatInfo = null;
this.dataGridTextBoxColumn4.HeaderText = "State";
this.dataGridTextBoxColumn4.MappingName = "state";
this.dataGridTextBoxColumn4.Width = 75;
//
// btnLoad
//
this.btnLoad.Location = new System.Drawing.Point(472, 8);
this.btnLoad.Name = "btnLoad";
this.btnLoad.TabIndex = 2;
this.btnLoad.Text = "Load";
this.btnLoad.Click += new System.EventHandler(this.btnLoad_Click);
//
// tboxLookupZipCode
//
this.tboxLookupZipCode.Location = new System.Drawing.Point(136, 8);
this.tboxLookupZipCode.Name = "tboxLookupZipCode";
this.tboxLookupZipCode.Size = new System.Drawing.Size(200, 20);
this.tboxLookupZipCode.TabIndex = 1;
this.tboxLookupZipCode.Text = "";
//
// lblLookupParameter
//
this.lblLookupParameter.Location = new System.Drawing.Point(24, 8);
this.lblLookupParameter.Name = "lblLookupParameter";
this.lblLookupParameter.Size = new System.Drawing.Size(100, 20);
this.lblLookupParameter.TabIndex = 3;
this.lblLookupParameter.Text = "Zip Code";
this.lblLookupParameter.TextAlign =
System.Drawing.ContentAlignment.MiddleRight;
//
// btnOK
//
this.btnOK.DialogResult = System.Windows.Forms.DialogResult.OK;
this.btnOK.Location = new System.Drawing.Point(378, 352);
this.btnOK.Name = "btnOK";
this.btnOK.TabIndex = 3;
this.btnOK.Text = "OK";
this.btnOK.Click += new System.EventHandler(this.btnOK_Click);
//
// btnCancel
//
this.btnCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
this.btnCancel.Location = new System.Drawing.Point(472, 352);
this.btnCancel.Name = "btnCancel";
this.btnCancel.TabIndex = 4;
this.btnCancel.Text = "Cancel";
this.btnCancel.Click += new System.EventHandler(this.btnCancel_Click);
//
// fclsLookup
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(568, 390);
this.Controls.Add(this.btnCancel);
this.Controls.Add(this.btnOK);
this.Controls.Add(this.lblLookupParameter);
this.Controls.Add(this.tboxLookupZipCode);
this.Controls.Add(this.btnLoad);
this.Controls.Add(this.dataGrid1);
this.Name = "fclsLookup";
this.Text = "Lookup";
((System.ComponentModel.ISupportInitialize)(this.dsLookup1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
this.ResumeLayout(false);

}
#endregion


private void btnLoad_Click(object sender, System.EventArgs e)
{
sqlSelectCommand1.Parameters["@zip"].Value = tboxLookupZipCode.Text;
dsLookup1.Clear();
sqlDataAdapter1.Fill(dsLookup1);
}

private void btnOK_Click(object sender, System.EventArgs e)
{

Close();
}

private void btnCancel_Click(object sender, System.EventArgs e)
{
Close();
}

private void dataGrid1_Navigate(object sender,
System.Windows.Forms.NavigateEventArgs ne)
{

Close();
}

protected void dataGrid1_MouseDown(object sender,
System.Windows.Forms.MouseEventArgs e)
{
string strMessage = "TEST";

//strMessage = "Row: " + dataGrid1.HitTest(e.X,e.Y).Row.ToString();
int x = dataGrid1.HitTest(e.X, e.Y).Row;

strZipCode = dataGrid1[x, 0].ToString();
strZipCodeDtlId = dataGrid1[x, 3].ToString();
MessageBox.Show(strZipCode);
MessageBox.Show("I still don't know what I'm doing, but I'm at " +
strMessage + ". I need to send back " + strZipCode);
}

}
}

Antti Keskinen said:
Hello !

There are no stupid questions.

The forms you define in C# always consist of a class. A single form is a
single class. Thus, your problem comes from the interaction between
classes.
You already knew this, however.

So, in addition to passing a reference variable to the zip code the user
has
entered (the one which you wish to check), pass in another reference to
the
ACTUAL zip code returned by the lookup form. Now, when the lookup form is
launched, you use the first reference to pass in the zipcode and
initialize
the datagrid to show possible values, and the second reference to pass
back
the value which the user clicked on in the datagrid.

Here's the most simplest example I can think of. It's written in C++, but
the language syntax is pretty much similar in C#.

class MyForm1
{
public:
int m_nUsersZipCode;
int m_nDatagridResult;
MyForm2* m_pLookupForm;
};

class MyForm2
{
public:
DWORD ValidateZipCode(int& nRefSource, int& nRefSelected);
};

int main(void)
{
MyForm1 form1;
MyForm2 form2;
form1.Show();
}

// In the ShowLookupForm handler of MyForm1
..
m_pLookupForm->ValidateZipCode( m_nUsersZipCode,
m_nDatagridResult );
..

This would be the most simplistic way to accomplish it. The problem
itself
is not C# related by nature, thus it's quite easy to answer it.

-Antti Keskinen

I'm a rookie at C# and OO so please don't laugh! I have a form
(fclsTaxCalculator) that contains a text box (tboxZipCode) containing a
zip
code. The user can enter a zip code in the text box and click a button
to
determine whether the zip code is unique. If the zip code is not
unique,
another form/dialog is displayed (fclsLookup) - lookup form/dialog.
The
zip
code is passed to the lookup form/dialog by reference. I then load a
datagrid with the possible matches (i.e. zip, city, county, state,
zipid).
When the user clicks the row in the datagrid, I want to pass the zipid
back
to the original form/dialog and run a stored procedure. My problem is
I
do
not know how to get the ZipId back to the fclsTaxCalculator
form/dialog.
I've search for examples of this and I've not been able to track one
down -
please help!!!
Click to expand...
Click to expand...
Click to expand...
 
If I have some C++ code and I can successfully call a C# assembly but cannot
access the variables in the C# assembly, would I post my question here or in
the C# forum? :D
--
Thanks,

Michael S. Wells \|/
Software Engineer ^O-O^
---------------------------o00o--(_)--o00o----------------------------
 
RedJoy said:
If I have some C++ code and I can successfully call a C# assembly but
cannot
access the variables in the C# assembly, would I post my question here or
in
the C# forum? :D
Click to expand...

I don't think that anyone is going to bite your head off over where to place
an interop question.

I'd suggest you post a _small_ amount of code that exhibits your problem. Is
it a simple issue of data member visibility?

Regards,
Will
 
I have inherited a huge multi project VS2003 .NET solution:
Two of the projects call the same dialog boxes but have differences within
the classes.
For maintainability and future conversion to VS2005 C# Main GUI I was
creating a C# Windows Form:

1) I finally managed to call the Windows Form.
2) I receive error C2039: 'm_nConnType' : is not a member of
'DialogLibrary::OpenSysbusSocket': see declaration of
'DialogLibrary::OpenSysbusSocket' when I build the solution.

Here is my C++ code:

#include "stdafx.h"
#include "genui.h"
#include "opensysb.h"
#include "genuidlg.h"
#include "cmdid.h"
#include "SysArray.h"

//I added the #using statements
#using <System.Windows.Forms.dll>
#using <system.dll>
#using <mscorlib.dll>
#using <DialogLibrary.dll>

IMPLEMENT_SERIAL (COpenSysbusIMDO, CIMDO, 1)
MIRAgEProcType COpenSysbusIMDO::m_nDest = user_defined;
struct OpenStruct
{
ConnectMethod CM;//defined in sysbsock.h
MIRAgEProcType nDest;
char szDestHostName [16];
};

COpenSysbusIMDO::COpenSysbusIMDO()
{
}

COpenSysbusIMDO::~COpenSysbusIMDO() {}

int COpenSysbusIMDO::RetrieveData(BOOL bEditFlag)
{
//COpenSysbusDlg dlg;
//I replaced the above line with the following line
DialogLibrary::OpenSysbusSocket *dlg = new
DialogLibrary::OpenSysbusSocket;

int nResult;

OpenStruct* pData = (OpenStruct*)m_sData.GetBufferSetLength(sizeof
OpenStruct);

if (bEditFlag)
{
if (m_mpDest != scmt)
{
// processing open sysbus socket
//dlg.m_nSim = (int)m_mpDest;
//I changed the notation from '.' to '->'
dlg->m_nConnType = (int)(pData->CM) - 1;
}
}

// set remaining member variables to indicate a Open SYSBUS Socket
command
m_dwParam = OpenSysbus;
m_nDest = pData->nDest;
m_sData.ReleaseBuffer(sizeof OpenStruct);
return nResult;
}

---------------------------------------------------------------------
Here is part of my C# class"

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace DialogLibrary
{
/// <summary>
/// Summary description for Class1.
/// </summary>
public class OpenSysbusSocket : Form
{
// private members
int m_nSim;
int m_nConnType;
int m_nDest;
int m_nDestPort;
int m_nPortNumber;

// empty constructor
public OpenSysbusSocket()
{
InitializeComponent();

this.m_nSim = 0;
this.m_nConnType = 0;
this.m_nDest = 0;
this.m_nDestPort = 0;
this.CalcPort();
}

// full constructor
public OpenSysbusSocket ( int nSim, int nConnType, int nDest, int
nDestPort, int nPortNumber)
{
this.m_nSim = nSim;
this.m_nConnType = nConnType;
this.m_nDest = nDest;
this.m_nDestPort = nDestPort;
this.CalcPort();
}

// public accessors
public int nSim
{
get { return m_nSim;}
set { m_nSim = value; }
}
public int nConnType
{
get { return m_nConnType;}
set { m_nConnType = value; }
}
public int nDest
{
get { return m_nDest;}
set { m_nDest = value; }
}
public int nDestPort
{
get { return m_nDestPort;}
set { m_nDestPort = value; }
}
public int nPortNumber
{
get { return m_nPortNumber;}
set { m_nPortNumber = value; }
}
}
}

--
Thanks,

Michael S. Wells \|/
Software Engineer ^O-O^
---------------------------o00o--(_)--o00o----------------------------
 
I have inherited a huge multi project VS2003 .NET solution:
Two of the projects call the same dialog boxes but have differences within
the classes.
For maintainability and future conversion to VS2005 C# Main GUI I was
creating a C# Windows Form:

1) I finally managed to call the Windows Form.
2) I receive error C2039: 'm_nConnType' : is not a member of
'DialogLibrary::OpenSysbusSocket': see declaration of
'DialogLibrary::OpenSysbusSocket' when I build the solution.

Here is my C++ code:

#include "stdafx.h"
#include "genui.h"
#include "opensysb.h"
#include "genuidlg.h"
#include "cmdid.h"
#include "SysArray.h"

//I added the #using statements
#using <System.Windows.Forms.dll>
#using <system.dll>
#using <mscorlib.dll>
#using <DialogLibrary.dll>

IMPLEMENT_SERIAL (COpenSysbusIMDO, CIMDO, 1)
MIRAgEProcType COpenSysbusIMDO::m_nDest = user_defined;
struct OpenStruct
{
ConnectMethod CM;//defined in sysbsock.h
MIRAgEProcType nDest;
char szDestHostName [16];
};

COpenSysbusIMDO::COpenSysbusIMDO()
{
}

COpenSysbusIMDO::~COpenSysbusIMDO() {}

int COpenSysbusIMDO::RetrieveData(BOOL bEditFlag)
{
//COpenSysbusDlg dlg;
//I replaced the above line with the following line
DialogLibrary::OpenSysbusSocket *dlg = new
DialogLibrary::OpenSysbusSocket;

int nResult;

OpenStruct* pData = (OpenStruct*)m_sData.GetBufferSetLength(sizeof
OpenStruct);

if (bEditFlag)
{
if (m_mpDest != scmt)
{
// processing open sysbus socket
//dlg.m_nSim = (int)m_mpDest;
//I changed the notation from '.' to '->'
dlg->m_nConnType = (int)(pData->CM) - 1;
}
}

// set remaining member variables to indicate a Open SYSBUS Socket
command
m_dwParam = OpenSysbus;
m_nDest = pData->nDest;
m_sData.ReleaseBuffer(sizeof OpenStruct);
return nResult;
}

---------------------------------------------------------------------
Here is part of my C# class"

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace DialogLibrary
{
/// <summary>
/// Summary description for Class1.
/// </summary>
public class OpenSysbusSocket : Form
{
// private members
int m_nSim;
int m_nConnType;
int m_nDest;
int m_nDestPort;
int m_nPortNumber;

// empty constructor
public OpenSysbusSocket()
{
InitializeComponent();

this.m_nSim = 0;
this.m_nConnType = 0;
this.m_nDest = 0;
this.m_nDestPort = 0;
this.CalcPort();
}

// full constructor
public OpenSysbusSocket ( int nSim, int nConnType, int nDest, int
nDestPort, int nPortNumber)
{
this.m_nSim = nSim;
this.m_nConnType = nConnType;
this.m_nDest = nDest;
this.m_nDestPort = nDestPort;
this.CalcPort();
}

// public accessors
public int nSim
{
get { return m_nSim;}
set { m_nSim = value; }
}
public int nConnType
{
get { return m_nConnType;}
set { m_nConnType = value; }
}
public int nDest
{
get { return m_nDest;}
set { m_nDest = value; }
}
public int nDestPort
{
get { return m_nDestPort;}
set { m_nDestPort = value; }
}
public int nPortNumber
{
get { return m_nPortNumber;}
set { m_nPortNumber = value; }
}
}
}


--
Thanks,

Michael S. Wells \|/
Software Engineer ^O-O^
---------------------------o00o--(_)--o00o----------------------------
 
Besides the mistake of trying to access the private variables instead of the
accessor methods, I added my DialogLibrary class as a reference to the
project that uses the Windows Form and it compiled/executed and updated the
variables.
--
Thanks,

Michael S. Wells \|/
Software Engineer ^O-O^
---------------------------o00o--(_)--o00o----------------------------



RedJoy said:
I have inherited a huge multi project VS2003 .NET solution:
Two of the projects call the same dialog boxes but have differences within
the classes.
For maintainability and future conversion to VS2005 C# Main GUI I was
creating a C# Windows Form:

1) I finally managed to call the Windows Form.
2) I receive error C2039: 'm_nConnType' : is not a member of
'DialogLibrary::OpenSysbusSocket': see declaration of
'DialogLibrary::OpenSysbusSocket' when I build the solution.

Here is my C++ code:

#include "stdafx.h"
#include "genui.h"
#include "opensysb.h"
#include "genuidlg.h"
#include "cmdid.h"
#include "SysArray.h"

//I added the #using statements
#using <System.Windows.Forms.dll>
#using <system.dll>
#using <mscorlib.dll>
#using <DialogLibrary.dll>

IMPLEMENT_SERIAL (COpenSysbusIMDO, CIMDO, 1)
MIRAgEProcType COpenSysbusIMDO::m_nDest = user_defined;
struct OpenStruct
{
ConnectMethod CM;//defined in sysbsock.h
MIRAgEProcType nDest;
char szDestHostName [16];
};

COpenSysbusIMDO::COpenSysbusIMDO()
{
}

COpenSysbusIMDO::~COpenSysbusIMDO() {}

int COpenSysbusIMDO::RetrieveData(BOOL bEditFlag)
{
//COpenSysbusDlg dlg;
//I replaced the above line with the following line
DialogLibrary::OpenSysbusSocket *dlg = new
DialogLibrary::OpenSysbusSocket;

int nResult;

OpenStruct* pData = (OpenStruct*)m_sData.GetBufferSetLength(sizeof
OpenStruct);

if (bEditFlag)
{
if (m_mpDest != scmt)
{
// processing open sysbus socket
//dlg.m_nSim = (int)m_mpDest;
//I changed the notation from '.' to '->'
dlg->m_nConnType = (int)(pData->CM) - 1;
}
}

// set remaining member variables to indicate a Open SYSBUS Socket
command
m_dwParam = OpenSysbus;
m_nDest = pData->nDest;
m_sData.ReleaseBuffer(sizeof OpenStruct);
return nResult;
}

---------------------------------------------------------------------
Here is part of my C# class"

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace DialogLibrary
{
/// <summary>
/// Summary description for Class1.
/// </summary>
public class OpenSysbusSocket : Form
{
// private members
int m_nSim;
int m_nConnType;
int m_nDest;
int m_nDestPort;
int m_nPortNumber;

// empty constructor
public OpenSysbusSocket()
{
InitializeComponent();

this.m_nSim = 0;
this.m_nConnType = 0;
this.m_nDest = 0;
this.m_nDestPort = 0;
this.CalcPort();
}

// full constructor
public OpenSysbusSocket ( int nSim, int nConnType, int nDest, int
nDestPort, int nPortNumber)
{
this.m_nSim = nSim;
this.m_nConnType = nConnType;
this.m_nDest = nDest;
this.m_nDestPort = nDestPort;
this.CalcPort();
}

// public accessors
public int nSim
{
get { return m_nSim;}
set { m_nSim = value; }
}
public int nConnType
{
get { return m_nConnType;}
set { m_nConnType = value; }
}
public int nDest
{
get { return m_nDest;}
set { m_nDest = value; }
}
public int nDestPort
{
get { return m_nDestPort;}
set { m_nDestPort = value; }
}
public int nPortNumber
{
get { return m_nPortNumber;}
set { m_nPortNumber = value; }
}
}
}


--
Thanks,

Michael S. Wells \|/
Software Engineer ^O-O^
---------------------------o00o--(_)--o00o----------------------------



William DePalo said:
I don't think that anyone is going to bite your head off over where to place
an interop question.

I'd suggest you post a _small_ amount of code that exhibits your problem. Is
it a simple issue of data member visibility?

Regards,
Will
Click to expand...
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