在转发器中动态创建的LinkButtons不触发ItemCommand事件

我有一个转发器,用来显示一个动态报告的输出,它从页面上的网络控件中获取条件。

问题是,当单击linkbutton时,它们不会触发ItemCommand事件,尽管它们显然被正确地创建并添加到标题中(有一些额外的代码来设置cssClass,repeater中的第一个列标题是在标记中设置的,itemcommand事件仅在此列上正确触发。当单击其他列标题时,repeater会按编程重新绑定,但不会动态地重新生成列。

如果有人能解释一下我做错了什么,我会非常感激的-虽然我是按照认可的方式来做的:-(

简化代码如下:

噩梦.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>

噩梦.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());
}