Selecting Values ​​from a Repeater Control in an ItemDataBound Event

Question

how to get repeater control values ​​in ItemDataBound event i wrote the following asp code

<asp:Repeater ID="repeaterItems" runat="server" OnItemDataBound="rptData_ItemDataBound" > <itemtemplate> <tr> <td style="font-family:Tahoma; font-size:small"><asp:Label id="content" runat="server">&nbsp;&nbsp;<%#DataBinder.Eval(Container.DataItem, "cont")%></asp:Label></td> </tr> <tr><td style="font-family:Verdana; font-size:small"><asp:Label id="url" runat="server"><a style="color:Green" href="<%#DataBinder.Eval(Container.DataItem, "url")%>" target="_blank"><%#DataBinder.Eval(Container.DataItem, "url")%></a></asp:Label></td></tr> <tr><td><asp:LinkButton runat="server" ID="glossary" >Glossary</asp:LinkButton></td></tr> <tr><td><asp:HiddenField runat="server" ID="id1"/><%#DataBinder.Eval(Container.DataItem, "id")%></td></tr> <tr><td></td></tr><tr><td></td></tr><tr><td></td></tr> </itemtemplate> </asp:Repeater> 

and ItemDataBound event in vb.net

  Protected Sub rptData_ItemDataBound(ByVal source As Object, ByVal e As RepeaterItemEventArgs) Dim content As String = "" Dim url As String = "" Dim lbl1 As Label = TryCast(e.Item.FindControl("content"), Label) Dim lbl2 As Label = TryCast(e.Item.FindControl("url"), Label) content = lbl1.Text url = lbl2.Text Dim btn As LinkButton = CType(e.Item.FindControl("glossary"), LinkButton) btn.PostBackUrl = "glossary.aspx?cont=" + content + "&url=" + url end sub 

but I get a null value in the content and url ... please help

Answer 1

First of all, in the markup, use the Text property of the label, do not put the databinder.Eval in

 <asp:Label ..> do not put content here </asp:Label> 

In the data bit element, events first detect the control in which the template is.

follow this example:

Markup:

 <asp:Repeater ID="Repeater1" runat="server" onitemdatabound="Repeater1_ItemDataBound"> <HeaderTemplate> </HeaderTemplate> <ItemTemplate> <asp:Label ID="Label1" runat="server" Text='<%# Eval("content") %>'></asp:Label> <asp:LinkButton ID="LinkButton1" runat="server">LinkButton</asp:LinkButton> </ItemTemplate> <AlternatingItemTemplate></AlternatingItemTemplate> <SeparatorTemplate></SeparatorTemplate> </asp:Repeater> 

Source:

WITH#:

 protected void Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e) { if (e.Item.ItemType == ListItemType.Item) { Label lbl = (Label)e.Item.FindControl("Label1"); LinkButton link = (LinkButton)e.Item.FindControl("LinkButton1"); link.PostBackUrl = "abcd/" + lbl.Text; } } 

VB.Net:

 Protected Sub Repeater1_ItemDataBound(sender As Object, e As RepeaterItemEventArgs) If e.Item.ItemType = ListItemType.Item Then Dim lbl As Label = DirectCast(e.Item.FindControl("Label1"), Label) Dim link As LinkButton = DirectCast(e.Item.FindControl("LinkButton1"), LinkButton) link.PostBackUrl = "abcd/" + lbl.Text End If End Sub