Insert UpdatePanel in ItemTemplate dynamically

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how can I convert the sample html code below into C#? I have searched around but could not find any usable help.

ASP.NET

<asp:TemplateField HeaderText="ID">

<ItemTemplate>
<asp:UpdatePanel runat="server" ID="UpId" 
UpdateMode="Conditional" ChildrenAsTriggers="true">
<ContentTemplate>
<asp:TextBox ID="TxtId" runat="server" 
Text="" OnTextChanged="TxtId_TextChanged" 
AutoPostBack="true"></asp:TextBox>
</ContentTemplate>

</asp:UpdatePanel>
</ItemTemplate>

</asp:TemplateField>

I have tried this so far, but have no idea how to get the UpdatePanel into Templatefield.

C#

TemplateField tpfield = new TemplateField();
tpfield.HeaderText = "ID"
gv.Columns.Add(tpfield);

UpdatePanel u1 = new UpdatePanel();
TextBox tb1 = new TextBox();
tb1.AutoPostBack = true;
tb1.TextChanged += tb1_TextChanged;

u1.ContentTemplateContainer.Controls.Add(tb1);

Posted 3-Nov-14 21:29pm

Member 11204763

Updated 3-Nov-14 22:24pm

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DamithSL 4-Nov-14 3:57am

can you update the question with the code what you have tried so far?

Member 11204763 4-Nov-14 4:25am

Done.

DamithSL 4-Nov-14 4:40am

You are create gridview controls, update panel and child controls dynamically and also you have to fire events on dynamically added controls. To do this, you need to be fully aware about ASP.NET page life cycle. check below thread for more information and how much its complex. dynamic-created-controls-inside-updatepanel[^] if you can explain the requremnent there may be a possiblity to find alternative way.

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Richard Deeming · Answer 1 · 2014-11-04T00:09:00

You need to create a class which implements the ITemplate interface[^]. The InstantiateIn method[^] will be called with the container control, and your class should add the template controls at that point.

C#

sealed class IDFieldTemplate : ITemplate
{
    public EventHandler TextChangedHandler;
    
    public void InstantiateIn(Control container)
    {
        UpdatePanel u1 = new UpdatePanel();
        TextBox tb1 = new TextBox();
        tb1.AutoPostBack = true;
        tb1.TextChanged += TextChangedHandler;
        
        u1.ContentTemplateContainer.Controls.Add(tb1);
        container.Controls.Add(u1);
    }
}
...

IDFieldTemplate template = new IDFieldTemplate();
template.TextChangedHandler += tb1_TextChanged;

TemplateField tpfield = new TemplateField();
tpfield.HeaderText = "ID"
tpfield.ItemTemplate = template;
gv.Columns.Add(tpfield);

NB: If you need to support two-way data binding, your template class will also need to implement the IBindableTemplate interface[^].