Combobox selection being forgotten in AJAX scenario

[Paul Buxton]

Hi,

I am trying to do the following.

I have a user control that contains.....

RAD Combo Box 1 - contains Filter Names (and underlying ID values), autopostback TRUE..  As part of the Click event, I set Combo Box2.Text to the value, so I can verify its set.

RAD Combo Box 2 is AJAX (typeahead LOD) and the data presented is based on the selection of Combo box 1. But....the problem I am getting here is that when Combo2  ItemsRequested is called, the SelectedValue or Value of ComboBox1 is empty!

The user control is wrapped in an AJAX panel on the webform.

Have I missed something really simple, because I think I can't see the wood for trees at the moment.

[Rosi]

Hi Paul ,

You cannot access any control's state in the ItemsRequested event handler.

Instead, you could use the ClientDataString property if you use RadComboBox for ASP.NET or the Context property if you use RadComboBox for  ASP.NET AJAX (part of Telerik.Web.UI suite) to pass any needed information regarding the states of the controls on the page where RadComboBox is.

Please read the following topics for more information if you use RadComboBox for ASP.NET:

• When is the ClientDataString needed?
• OnClientItemsRequesting

Please read the following topics for more information if you use RadComboBox for ASP.NET AJAX (part of Telerik.Web.UI suite)

• Passing Context Information to the Server
• OnClientItemsRequesting 

I hope this helps.

Regards,
Rosi
the Telerik team

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