A container problem

  • Thread starter Thread starter Cem Louis
  • Start date Start date
C

Cem Louis

Hi Bill,

I think I have some same problem as I wrote in codeproject boards. I put a
textbox on my dialog and I want to send the text to the child's label. I
think it is the same problem(I work only in SDI systems before, these MDI
systems are new for me...). If you have time can you quick check the code? I
am sending my Parent, Dialog and Child.cs files...

Thank you very much,
Cem Louis

/////Parent.cs/////

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

namespace Test1
{
/// <summary>
/// Summary description for Parent.
/// </summary>
public class Parent : System.Windows.Forms.Form
{
private System.Windows.Forms.MainMenu mainMenu1;
private System.Windows.Forms.MenuItem menuItem1;
private System.Windows.Forms.MenuItem menuItem2;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public Parent()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
}

/// <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.mainMenu1 = new System.Windows.Forms.MainMenu();
this.menuItem1 = new System.Windows.Forms.MenuItem();
this.menuItem2 = new System.Windows.Forms.MenuItem();
//
// mainMenu1
//
this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItem1});
//
// menuItem1
//
this.menuItem1.Index = 0;
this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItem2});
this.menuItem1.Text = "Show Dialog";
//
// menuItem2
//
this.menuItem2.Index = 0;
this.menuItem2.Text = "Show!";
this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
//
// Parent
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.IsMdiContainer = true;
this.Menu = this.mainMenu1;
this.Name = "Parent";
this.Text = "Parent";

}
#endregion

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Parent());
}

private void menuItem2_Click(object sender, System.EventArgs e)
{
Test1.Dialog Dialog = new Test1.Dialog(this);
Dialog.Show();
}
}
}

///// Dialog.cs /////

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

namespace Test1
{
/// <summary>
/// Summary description for Dialog.
/// </summary>
public class Dialog : System.Windows.Forms.Form
{
private Form MainForm;

private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public string sample_text;

public Dialog(Form frmMain)
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
this.MainForm = frmMain;
}
public Dialog()
{
InitializeComponent();
}

/// <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.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(104, 104);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "Show Child";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(96, 64);
this.textBox1.Name = "textBox1";
this.textBox1.TabIndex = 1;
this.textBox1.Text = "textBox1";
//
// Dialog
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.textBox1,
this.button1});
this.Name = "Dialog";
this.Text = "Dialog";
this.ResumeLayout(false);

}
#endregion

private void button1_Click(object sender, System.EventArgs e)
{
this.sample_text = this.textBox1.Text;
Test1.Child chform = new Test1.Child();
chform.MdiParent = this.MainForm;
chform.Show ();
}
}
}

///// Child.cs /////

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

namespace Test1
{
/// <summary>
/// Summary description for Child.
/// </summary>
public class Child : System.Windows.Forms.Form
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
private System.Windows.Forms.Label label1;
Test1.Dialog Dialog = new Test1.Dialog();

public Child()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
}

/// <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.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// label1
//
this.label1.Location = new System.Drawing.Point(56, 80);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(168, 48);
this.label1.TabIndex = 0;
this.label1.Text = "label1";
//
// Child
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.label1});
this.Name = "Child";
this.Text = "Child";
this.Paint += new
System.Windows.Forms.PaintEventHandler(this.Child_Paint);
this.ResumeLayout(false);

}
#endregion

private void Child_Paint(object sender, PaintEventArgs e)
{
if(Dialog.sample_text == "")
{
this.label1.Text = "No text written";
}
else
{
this.label1.Text = Dialog.sample_text;
}

}
}
}
 
Your problem is that in the Child you declare (and instantiate) a new
dialog - meaning you will never find the original dialog when you try to
read it's text.
Instead you should create a new constructor in your child, and transfer the
string as a parameter to this constructor - or the Dialog if that's better.

/Freddy

Cem Louis said:
Hi Bill,

I think I have some same problem as I wrote in codeproject boards. I put a
textbox on my dialog and I want to send the text to the child's label. I
think it is the same problem(I work only in SDI systems before, these MDI
systems are new for me...). If you have time can you quick check the code? I
am sending my Parent, Dialog and Child.cs files...

Thank you very much,
Cem Louis

/////Parent.cs/////

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

namespace Test1
{
/// <summary>
/// Summary description for Parent.
/// </summary>
public class Parent : System.Windows.Forms.Form
{
private System.Windows.Forms.MainMenu mainMenu1;
private System.Windows.Forms.MenuItem menuItem1;
private System.Windows.Forms.MenuItem menuItem2;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public Parent()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
}

/// <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.mainMenu1 = new System.Windows.Forms.MainMenu();
this.menuItem1 = new System.Windows.Forms.MenuItem();
this.menuItem2 = new System.Windows.Forms.MenuItem();
//
// mainMenu1
//
this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItem1});
//
// menuItem1
//
this.menuItem1.Index = 0;
this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItem2});
this.menuItem1.Text = "Show Dialog";
//
// menuItem2
//
this.menuItem2.Index = 0;
this.menuItem2.Text = "Show!";
this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
//
// Parent
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.IsMdiContainer = true;
this.Menu = this.mainMenu1;
this.Name = "Parent";
this.Text = "Parent";

}
#endregion

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Parent());
}

private void menuItem2_Click(object sender, System.EventArgs e)
{
Test1.Dialog Dialog = new Test1.Dialog(this);
Dialog.Show();
}
}
}

///// Dialog.cs /////

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

namespace Test1
{
/// <summary>
/// Summary description for Dialog.
/// </summary>
public class Dialog : System.Windows.Forms.Form
{
private Form MainForm;

private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public string sample_text;

public Dialog(Form frmMain)
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
this.MainForm = frmMain;
}
public Dialog()
{
InitializeComponent();
}

/// <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.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(104, 104);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "Show Child";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(96, 64);
this.textBox1.Name = "textBox1";
this.textBox1.TabIndex = 1;
this.textBox1.Text = "textBox1";
//
// Dialog
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.textBox1,
this.button1});
this.Name = "Dialog";
this.Text = "Dialog";
this.ResumeLayout(false);

}
#endregion

private void button1_Click(object sender, System.EventArgs e)
{
this.sample_text = this.textBox1.Text;
Test1.Child chform = new Test1.Child();
chform.MdiParent = this.MainForm;
chform.Show ();
}
}
}

///// Child.cs /////

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

namespace Test1
{
/// <summary>
/// Summary description for Child.
/// </summary>
public class Child : System.Windows.Forms.Form
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
private System.Windows.Forms.Label label1;
Test1.Dialog Dialog = new Test1.Dialog();

public Child()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
}

/// <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.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// label1
//
this.label1.Location = new System.Drawing.Point(56, 80);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(168, 48);
this.label1.TabIndex = 0;
this.label1.Text = "label1";
//
// Child
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.label1});
this.Name = "Child";
this.Text = "Child";
this.Paint += new
System.Windows.Forms.PaintEventHandler(this.Child_Paint);
this.ResumeLayout(false);

}
#endregion

private void Child_Paint(object sender, PaintEventArgs e)
{
if(Dialog.sample_text == "")
{
this.label1.Text = "No text written";
}
else
{
this.label1.Text = Dialog.sample_text;
}

}
}
}
Click to expand...
 
Hi Freddy,

If you have time can you give a sample? (I am a total newbie about these MDI
type of things)... If you don't have time, it's not a problem.

Thanx anyway,
Cem Louis

msnews.microsoft.com said:
Your problem is that in the Child you declare (and instantiate) a new
dialog - meaning you will never find the original dialog when you try to
read it's text.
Instead you should create a new constructor in your child, and transfer the
string as a parameter to this constructor - or the Dialog if that's better.

/Freddy

Cem Louis said:
Hi Bill,

I think I have some same problem as I wrote in codeproject boards. I put a
textbox on my dialog and I want to send the text to the child's label. I
think it is the same problem(I work only in SDI systems before, these MDI
systems are new for me...). If you have time can you quick check the
Click to expand...
code?
I
am sending my Parent, Dialog and Child.cs files...

Thank you very much,
Cem Louis

/////Parent.cs/////

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

namespace Test1
{
/// <summary>
/// Summary description for Parent.
/// </summary>
public class Parent : System.Windows.Forms.Form
{
private System.Windows.Forms.MainMenu mainMenu1;
private System.Windows.Forms.MenuItem menuItem1;
private System.Windows.Forms.MenuItem menuItem2;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public Parent()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
}

/// <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.mainMenu1 = new System.Windows.Forms.MainMenu();
this.menuItem1 = new System.Windows.Forms.MenuItem();
this.menuItem2 = new System.Windows.Forms.MenuItem();
//
// mainMenu1
//
this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItem1});
//
// menuItem1
//
this.menuItem1.Index = 0;
this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItem2});
this.menuItem1.Text = "Show Dialog";
//
// menuItem2
//
this.menuItem2.Index = 0;
this.menuItem2.Text = "Show!";
this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
//
// Parent
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.IsMdiContainer = true;
this.Menu = this.mainMenu1;
this.Name = "Parent";
this.Text = "Parent";

}
#endregion

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Parent());
}

private void menuItem2_Click(object sender, System.EventArgs e)
{
Test1.Dialog Dialog = new Test1.Dialog(this);
Dialog.Show();
}
}
}

///// Dialog.cs /////

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

namespace Test1
{
/// <summary>
/// Summary description for Dialog.
/// </summary>
public class Dialog : System.Windows.Forms.Form
{
private Form MainForm;

private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public string sample_text;

public Dialog(Form frmMain)
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
this.MainForm = frmMain;
}
public Dialog()
{
InitializeComponent();
}

/// <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.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(104, 104);
this.button1.Name = "button1";
this.button1.TabIndex = 0;
this.button1.Text = "Show Child";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(96, 64);
this.textBox1.Name = "textBox1";
this.textBox1.TabIndex = 1;
this.textBox1.Text = "textBox1";
//
// Dialog
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.textBox1,
this.button1});
this.Name = "Dialog";
this.Text = "Dialog";
this.ResumeLayout(false);

}
#endregion

private void button1_Click(object sender, System.EventArgs e)
{
this.sample_text = this.textBox1.Text;
Test1.Child chform = new Test1.Child();
chform.MdiParent = this.MainForm;
chform.Show ();
}
}
}

///// Child.cs /////

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

namespace Test1
{
/// <summary>
/// Summary description for Child.
/// </summary>
public class Child : System.Windows.Forms.Form
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
private System.Windows.Forms.Label label1;
Test1.Dialog Dialog = new Test1.Dialog();

public Child()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
}

/// <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.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// label1
//
this.label1.Location = new System.Drawing.Point(56, 80);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(168, 48);
this.label1.TabIndex = 0;
this.label1.Text = "label1";
//
// Child
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.label1});
this.Name = "Child";
this.Text = "Child";
this.Paint += new
System.Windows.Forms.PaintEventHandler(this.Child_Paint);
this.ResumeLayout(false);

}
#endregion

private void Child_Paint(object sender, PaintEventArgs e)
{
if(Dialog.sample_text == "")
{
this.label1.Text = "No text written";
}
else
{
this.label1.Text = Dialog.sample_text;
}

}
}
}
Click to expand...
Click to expand...
 
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