Hi Mark,
Regarding on the questions you mentioned, here are some of my suggestion:
1) Creates a gridview control with the results of a SQL stored procedure
that has 1 parameter (text)
==============================
I'm wondering what's the difficulty you encounter here. To display the
results, I think it include two parts:
** first, you need to execute the SQSL stored procedure and get the
returned resultset(need to supply the parameter)
**second, you should bind the resultset to the gridview control
for calling stored procedure in ASP.NET, here are many reference:
#How to call SQL Server stored procedures in ASP.NET by using Visual
Basic
.NET
http://support.microsoft.com/kb/306574
And you can also use SQL Datasource control in ASP.NET 2.0 which make
databinding/query more convenient:
#SQLDataSource Control
http://www.learn-asp.net/ASPTutorials/SQLDataSourceControl.aspx
http://www.asp.net/LEARN/data-access/tutorial-47-cs.aspx
For bind resultset to Gridview, I think it's quite straightforward:
** if you query the database programmtically, you need to assign the result
set(datatable or datareader) to Gridview and call DataBind method. e.g.
Gridview1.DataSource = [returned data resultset];
Gridview1.DataBind();
Or you can use SqlDataSource control(refer to the aritlce I mentioned
above).
2) Adds an extra column that displays the result of a VB.Net function
that
uses a value from an existing column
================================
I think the natural approach is adding a template column which use other
existing column's datafield to compute the certain value you want. Here are
some reference about using template column:
#Using TemplateFields in the GridView Control
http://www.asp.net/learn/data-access/tutorial-12-cs.aspx
#GridView Examples for ASP.NET 2.0: Working with TemplateFields
http://msdn.microsoft.com/en-us/library/aa479353.aspx
And here is a simple example. I use a gridview to display data through a
SqlDataSource control and it contains two columns by default. I add an
additional template column which use a helper function(to calculate the
display value depend on the two existing column value):
aspx template>>>>>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$
ConnectionStrings:testdbConnectionString
%>"
SelectCommand="SELECT [id], [name] FROM
[numtable]"></asp:SqlDataSource>
<br />
<asp:GridView ID="GridView1" runat="server"
AutoGenerateColumns="False"
DataKeyNames="id" DataSourceID="SqlDataSource1">
<Columns>
<asp:BoundField DataField="id" HeaderText="id"
ReadOnly="True"
SortExpression="id" />
<asp:BoundField DataField="name" HeaderText="name"
SortExpression="name" />
<asp:TemplateField>
<ItemTemplate>
<%# MyFunction(Eval("id"), Eval("name")) %>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
code behind>>>>>>>>>>>>>>>
protected string MyFunction(object id, object name)
{
return id.ToString() + "|" + name.ToString();
}
In addition, if you do not have much ASP.NET programming experience, I
would suggest you have a look at the tutorials on ASP.NET offical site:
http://www.asp.net/learn/
and since you're developing data access application, the "Data Access
tutorial" is especially important for you:
http://www.asp.net/learn/data-access/
Sincerely,
Steven Cheng
Microsoft MSDN Online Support Lead
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--------------------
From: "Mark B" <
[email protected]>
Subject: Datagrid example
Date: Fri, 30 May 2008 13:10:32 +1200
Can someone write some VB.Net example code for me that does this:
1) Creates a gridview control with the results of a SQL stored procedure
that has 1 parameter (text)
2) Adds an extra column that displays the result of a VB.Net function that
uses a value from an existing column
I have spent 4 hours trying to do this after Googling for examples...
There
are many new concepts that I haven't had much experience with...
