Hello -

We're using RadComboBox as our standard drop down list in our product. We are using MarkFirstMatch to enable the "type ahead" function in lists, however we have found that if users type in invalid text the ComboBox will keep the value anyway (invalid being not in the list of items to select when used as a DDL). We would like to restrict user input only to the items found in the list, how might we go about doing this? Is there a good baked in way?

Hello Carlo,

In order to achieve the desired functionality, you should set the MarkFirstMatch property to true and AllowCustomText to false. You could test the behavior with our online demo here :

http://demos.telerik.com/aspnet-ajax/combobox/examples/functionality/autocompleteclientside/defaultcs.aspx

Simply set the aforementioned properties configuration to the AutoComplete fieldset demo and you could test the behavior.

Regards,
Nencho
Telerik