Setting DataSource property on RadComboBox at runtime

[Michael]

 

I am trying to set the datasource property of a radcombobox in the selectedindexchanged eventhandler of another radcombobox.

I am getting this error. 

 

 

How do I accomplish this?

[Michael]

I am able to set the DataSource property in PageLoad event. Because the values in this dropdown depend on the users selection in the country dropdown, I need to set the state dropdown datasource property in the country dropdown's SelectedIndexChanged event handler. It is not allowing me to do that.

[Vessy]

Hello Michael,

You can see how to implement cascading functionalities between several RadcomboBox controls here:

• https://demos.telerik.com/aspnet-ajax/combobox/examples/functionality/multiplecomboboxes/defaultcs.aspx

 

Please, give this approach a try and let me know if you need further assistance on this matter after that.

Regards,
Vessy
Progress Telerik