Events not getting fired for templated controls.

Question

Hi,
I have an asp.net custom server control, in which I have given template support. The template controls render fine. But, the events of template controls are not getting fired. For example, If I added an asp dropdownlist as a template in my custom control
and select any item from dropdownlist and raised the postback, the selected item did not get updated in dropdownlist ( i.e selectedIndex, selectedText of the control remains the same as like initial rendering.), also I am not able to trigger the SelectedIndexChanged
server side event of dropdownlist.
I have used NamingContainer for rendering the template controls. The codes are as follows,
<code>
This is my source:
     private
ITemplate fileTemplate =
null;
 [TemplateContainer(typeof(ContentContainer)),
PersistenceMode(PersistenceMode.InnerProperty),
DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
TemplateInstance(TemplateInstance.Single)]
public ITemplate FileTemplate
get
   return fileTemplate;
set
fileTemplate = value;
public class
ContentContainer :
WebControl, INamingContainer
internal ContentContainer()
protected override
void CreateChildControls()
this.Controls.Clear();
ContentContainer container =
new ContentContainer();
this.FileTemplate.InstantiateIn(container);
this.Controls.Add(container);
base.CreateChildControls();
      public
override ControlCollection Controls
get
this.EnsureChildControls();
       return
base.Controls;
Whereas in my application, I have rendered the custom control with template as below,
[ASPX]
<mycustom control>
<FileTemplate>
<asp:DropDownList
ID="ddc1"
runat="server"
AutoPostBack="true"
OnSelectedIndexChanged="ddc1_SelectedIndexChanged"
>
<asp:ListItem
Text="Item1"
Value="one"></asp:ListItem>
<asp:ListItem
Text="Item2"
Value="two"></asp:ListItem>
<asp:ListItem
Text="Item3"
Value="three"></asp:ListItem>
<asp:ListItem
Text="Item4"
Value="four"></asp:ListItem>
</asp:DropDownList>
</FileTemplate>
</mycustom control>
[Code Behind]
This event is not getting raised.
protected
void ddc1_SelectedIndexChanged(object sender,
EventArgs e)
 I can get the template control's details here using "FindControl("templateID")". But not able to get the updated details.
protected void btn_Click1(object sender,
EventArgs e)
var template= this.CustomControl.Controls[0].FindControl("ddc1");
</code>
Where I am going wrong? Kindly help me on this.
Thanks in advance.
Regards,
Meena

Answer 1

This is a Windows Phone forum, not a web development forum. Please ask this question at the forums at
http://asp.net.
Matt Small - Microsoft Escalation Engineer - Forum Moderator
If my reply answers your question, please mark this post as answered.
NOTE: If I ask for code, please provide something that I can drop directly into a project and run (including XAML), or an actual application project. I'm trying to help a lot of people, so I don't have time to figure out weird snippets with undefined
objects and unknown namespaces.