ComboBox and ITemplate fails under ASP.NET AJAX (working under ASP.NET)

[Brandon]

Telerik.Web.UI.dll v2008.1.619.20

Hi Telerik, trying to upgrade my custom (inherited) ComboBox to the version above from RadComboBox.Net2.dll v2.8.1.0

Inheriting from Combox, ComboBoxItem and creating a custom ItemTemplate (note that ComboBoxItem in this example is not really necessary but my production version has additional attributes added here)

Basically, when I 'databind my control it renders fine, but when I add elements to my cmbo via the <items/> collection in my ASPX page the controls fails to render.  I added calls to .DataBind() on the control and the individual items but this doesn't seem to help any ...debugger shows that the ComboBoxTemplate is never instantiated/created for the controls with items declared in the markup.

All was/is fine under the old version?

Thanks for any and all advice

ComboBox.cs

using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using Telerik.Web.UI;

namespace TelerikTestSite
{
    public class ComboBox : RadComboBox
    {
        protected override void OnInit ( EventArgs e )
        {
            // set template
            base.ItemTemplate = new ComboBoxTemplate ( );

            // continue event
            base.OnInit ( e );
        }
    }
}

ComboBoxItem.cs

namespace TelerikTestSite
{
    public class ComboBoxItem : RadComboBoxItem
    {
        public ComboBoxItem ( ) : base ( )
        {

        }
    }
}

ComboBoxTemplate.cs

using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using Telerik.Web.UI;

namespace TelerikTestSite
{
    public class ComboBoxTemplate : ITemplate
    {
        public void InstantiateIn ( Control container )
        {
            CheckBox cb = new CheckBox ( );
            cb.ID = "cb";
            cb.DataBinding += new EventHandler ( cb_DataBinding );
            container.Controls.Add ( cb );
        }

        void cb_DataBinding ( object sender, EventArgs e )
        {
            CheckBox target = (CheckBox) sender;
            RadComboBoxItem item = (RadComboBoxItem) target.BindingContainer;
            target.Text = (string) DataBinder.Eval ( item, "Text" );
        }
    }
}

Default.aspx

<div>
            DataBind ..works: <app:combobox runat="server" id="cb1" />
        </div>
        <br />
        <div>Declarative ..fails:
            <app:combobox runat="server" id="cb2" highlighttemplateditems="true">
                <items>
                    <app:comboboxitem text="Item 1" />
                    <app:comboboxitem text="Item 2" />
                    <app:comboboxitem text="Item 3" />
                </items>
            </app:combobox>
        </div>

Default.aspx.cs

 protected void Page_Load(object sender, EventArgs e)
    {
        ArrayList al = new ArrayList ( 3 );
        al.Add ( "Item 1" );
        al.Add ( "Item 2" );
        al.Add ( "Item 3" );

        this.cb1.DataSource = al;
        this.cb1.DataBind ( );

        foreach ( ComboBoxItem item in cb2.Items )
            item.DataBind ( );

        this.cb2.DataBind ( );
    }

[Veselin Vasilev]

Hello Matthew Tamm,

Please try the following:

ComboBoxTemplate  template = new ComboBoxTemplate ();
   foreach (RadComboBoxItem item in RadComboBox1.Items)
   {
       template.InstantiateIn(item);
   }

   RadComboBox1.DataBind();

Let me know the results.

All the best,
Veskoni
the Telerik team

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