adding buttons to a datagrid (web forms)

[Phil Townsend]

I have a datagrid which is part of a web form. I need to place a button
in each row to invoke a custom method (not an update, delete, cancel,
etc.). I thought that a button in a datagrid item template raises the
ItemCommand event. however, I can get no response from the button. The
code is never reached. I have registered an event handler that points to
the method. What could I be doing wrong?

 

[Dan Bass]

Phil,

Could you put down your HTML for the grid, as well as the item command event
handler?

We'll see if we can help from there.

Thanks

Dan.
ps. are you related to a Paul Towsend?

 

[Phil Townsend]

webform code:

<form id="Form1" method="post" runat="server">
<asp:datagrid id="dgconcept" runat="server"
AlternatingItemStyle-BackColor="#99ffcc" AutoGenerateColumns="False"
CellPadding="4">
<Columns>
<asp:TemplateColumn HeaderText="">
<ItemTemplate>
<%#DataBinder.Eval(Container.DataItem,"conceptid")%>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="Concept">
<ItemTemplate>
<%#DataBinder.Eval(Container.DataItem,"concept")%>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn>
<ItemTemplate>
<asp:Button ID="btnQuestionList" CommandName="showQuestions"
Text=" ? " Runat="server" />
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:datagrid>
<asp:datagrid id="dgquestions" runat="server"></asp:datagrid>
<asp:datagrid id="dganswers" runat="server"></asp:datagrid>
</form>

Codebehind:


protected void showQuestions(object source, DataGridCommandEventArgs
e)
{
dgquestions.DataSource=dsfulltest().Tables[1];
dgquestions.Visible=true;
dgquestions.DataBind();
}

As mentioned before, when running this through a VS.NET debugger, the
code in showQuestions method is never reached.

 

[Dan Bass]

Phil,

From you've setup the command for "showQuestions", but there's no link (in
the code you've provided anyway) that assigns the onclick event to the
function.

try this:
<ItemTemplate>
<asp:Button ID="btnQuestionList" OnClick="showQuestions"
CommandName="showQuestions" Text=" ? " Runat="server" />
</ItemTemplate>

I found this page with an example of the sort of thing you're doing...
http://authors.aspalliance.com/aldotnet/examples/cd.aspx (Example
1)

Hope that helps.
Daniel.