WebCombo supports AllowAddItem feature to allow users to add items that are not in the DataSource transparently.

When users input a text that is not in the DataSource and press Tab or lose the WebCombo’s focus, the control will invoke an OnTheFly PostBack to process OnAddItem server side event if defined. If the OnAddItem’s ReturnValue is True (default), the control will process and add the item in client side dynamically. Otherwise, it will cancel the default processing and not adding any items.

I enclosed a simple sample of this scenario as attachment. A WebGrid shows list of Products of Northwind.mdb access data base. It has ten fields: ProductID; ProductName; SupplierID; CategoryID; QuantityPerUnit; UnitPrice; UnitsInStock; UnitsOnOrder; ReorderLevel; Discontinued. WebCombo1 control is utilized as CategoryID field edit type and shows the CategoryName instead of CategoryID.

In the sample, user can type text that is not in the DataSource of Category and press Tab or lose the WebCombo’s focus, then the control will add the item in the DataSource transparently.

Please have the attached sample evaluated on your end and let us know whether this helps or not.

Thanks for the detailed answer and the sample code; I just like to ask if there's any possibility to do this using asp:linqDataSource 'cos you've given the sample with accessDataSource and I can't find the equivalent of the insertCommand etc. through the linqDataSource.

Thanks a lot

Thanks for the detailed answer and the sample code; I just like to ask if there's any possibility to do this using asp:linqDataSource 'cos you've given the sample with accessDataSource and I can't find the equivalent of the insertCommand etc. through the linqDataSource.

Thanks a lot

As it is understood that, linq does that automatically. Thanks for the detailed answer.

Glad to hear that the sample helps.

Should you need further assistance or run into any problems regarding our controls, feel free to post it into our community site. We would be happy to assist you again.