Hi.
I've got a repeater that's used to display
the output of a dynamic report that takes criteria from webcontrols on
the page.
Within the repeater's ItemDataBound method I'm adding
controls (Linkbuttons for sorting by column values) dynamically to
the header of
the repeater based on values selected in a checkbox list and at this point setting
the CommandArgument and CommandName properties of
the linkbuttons.
The issue is that when
the linkbuttons are clicked they don't fire
the ItemCommand event although they are clearly being correctly created and added to
the header (there is some additional code to set
the cssClass, text etc. and this works as expected.)
The first column header in
the repeater is set in
the markup and
the itemcommand event fires correctly on this one only. When
the other column headers are clicked
the repeater rebinds as programmed, but
the columns are not dynamically re-generated.
I would really appreciate somebody explaining what I'm doing wrong - afaik I'm following
the approved way of doing this :-(
Simplified code follows:
Nightmare.ascx
<asp:repeater runat="server" id="rptReport" OnItemDataBound="rptResults_ItemDataBound" OnItemCommand="rptResults_ItemCommand" EnableViewState="true">
<headertemplate>
<table>
<tr runat="Server" id="TRDynamicHeader">
<th>
<!-- This one works -->
<asp:Linkbutton runat="server" CommandName="sort" commandArgument='<%# Eval("Name")%?' />
</th>
<!-- additional header cells get added dynamically here -->
</tr>
</headertemplate>
<itemTemplate>
<td><%# Eval("Name")</td>
...
</itemTemplate>
</asp:repeater>
Nightmare.ascx.cs
protected void PageLoad(object sender, eventArgs e){
if (! isPostback){
setupGui();//just binds dropdowns etc. to datasources
}
}
protected void btnRunReport_Click(...){
List<ReportLines> lstRep = GetReportLines();
rptReport.DataSource = lstRep;
repReport.DataBind();
}
protected void rptReport_ItemDataBound (...){
if (e.Item.ItemType == ListItemType.Header)
{
foreach (ListItem li in chbxListBusFuncs.Items)
{
if (li.Selected)
{
th = new HtmlTableCell();
lb = new LinkButton();
lb.CssClass = "SortColHeader";
lb.CommandArgument = li.Text.Replace(" ", "");
lb.CommandName = "sort";
lb.Text = li.Text;
th.
Controls.Add(lb);
((HtmlTableRow)e.Item.FindControl("TRDynamicHeader")).Cells.Add(th);
}
}
}
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
//Row level customisations, totals calculations etc.
}
}
<!-- this only gets called when
the 'hardcoded' linkbutton in
the markup is clicked.
protected void rptReport_ItemCommand(object sender, Eventargs e){
lblDebug.Text = string.Format("Well? What's Happening? -> {0}:{1}", e.CommandName, e.CommandArgument.ToString());
}
(The only thing that can call
the runreport routine is a single button on
the page, not shown in
the code snippet above.)
