[Solved] Custom Attributes not accessible during SelectedIndexChanged event

[Paul Corbett]

Hi,

I am using a radComboBox with LoadOnDemand enabled. During the ItemRequested event I populate the list of items based on the key stroke, when I create the new RadComboBoxItem to add my combo I add a new attribute by

newItem.Attributes["MyAttribute"] = "SomeValue";

I need to access this attribute during the SelectedIndexChanged server event.
When I try

string myAttr = myCombo.SelectedItem.Attributes["MyAttribute"];

I get a null Exception error


thanks

[Veselin Vasilev]

Hi Chris Lekkas,

ComboBox items loaded on demand using the ItemsRequested event handler do not exist on the server and cannot be accessed (or their custom attributes) using the server-side FindItemByText / Value methods.

This is needed for speed (otherwise the combobox will not be that responsive upon each keypress if state information and ViewState were persisted).

I suggest that you take a look at this code library: Access Custom Attributes of the Selected Item at Server Side when using Load On Demand

The code is using the "classic" RadComboBox, but I think you will easily get the idea.

Greetings,
Veskoni
the Telerik team

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