Am not sure why I cannot access my Label control which was inside the Panel and the Panel is inside the DataList
<asp:DataList ID="DataList2" runat="server" DataSourceID="SqlDataSource1" Width="100%"> <ItemTemplate> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <!-- post details --> <td style="width: 60%"> <asp:Panel ID="panelPostDetails" runat="server" CssClass="postpage_details"> <table border="0" cellpadding="5" cellspacing="0" width="100%"> <tr> <td colspan="2"><div class="postpage_header"><%# Eval("Heading") %></div></td> </tr> <tr> <td> <img src="picserver/posts/<%# Eval("ImagePath") %>/1.jpg" alt="preview" style="width: 240px;" /> <div id="morepictures"> <asp:Label ID="lblMorePictures" runat="server" /> </div> </td> <td> <div style="padding: 0px 5px 0px 5px;"> <div> more stuff here </div> </div> </td> </tr> </table> </asp:Panel> <asp:RoundedCornersExtender ID="RoundedCornersExtender1" runat="server" Radius="6" Corners="All" TargetControlID="panelPostDetails"></asp:RoundedCornersExtender> </td> </tr> </table> </ItemTemplate> </asp:DataList>
but when I tried using "lbl" in Page_Load, it seems it cannot find the control? can you please help me?
ItemDataBound and Page_Load event --------------------------------- Panel p = DataList2.FindControl("panelPostDetails") as Panel; Label l = p.FindControl("lblMorePictures") as Label; l.Text = code;
that code returns Object reference not set to an instance of an object.
Thanks in advance
update:
ItemDataBound and Page_Load event --------------------------------- Panel p = DataList2.FindControl("panelPostDetails") as Panel; if(p==null) { System.Diagnostic.Debug.WriteLine("panel does not exist"); } else { System.Diagnostic.Debug.WriteLine("panel does exist"); } output: panel does not exist
what on earth is going on!?!
Typically, you access controls like this at runtime by handling either the DataList's ItemCreated or ItemDataBound event. Here's a sample event handler:
protected void DataList2_ItemDataBound(object sender, DataListItemEventArgs e) {
if (e.Item.ItemType == ListItemType.Item) {
Label lbl = (Label)e.Item.FindControl("panelPostDetails").FindControl("lblMorePictures");
lbl.Text = code;
}
}
Wire up your the event handler like this:
<asp:DataList ID="DataList2" runat="server" OnItemDataBound="DataList2_ItemDataBound" ...