Using a Multicolumn Combobox with OpenAccess and trying to insert a blank item - as need to
have the option of not selecting any item from the list - tried various solutions/posts with no success - code for combobox as below
Tried online demo http://www.telerik.com/help/aspnet-ajax/combobox-insert-default-item-when-databinding.html
4 Answers, 1 is accepted
Please have a look into the complete code to insert a blank Item in RadMultiColumComboBox.
Hope this will helps you.
(Using OpenAccess with simple binding and edit form template to allow editing of record)
I guess your RadComboBox is inside another control.(Here for example inside RadGrid). I have tried a sample scenario and was able to update the data. Please have a look into the following code.
Please make sure that your updating column allows null value to add into database table. For more help, please provide your complete code.
I'm using a GridDropDownColumn that is bound to a different data source than the RadGrid - got a solution by adding a blank item in the RadGrid_ItemDataBound Event as code below (removed other columns etc. to make it easier to read) - used this code to add a blank item to other dropdown lists (copied it but can't remember where found it) - the only disadvantage to this method is that the blank item appears at the bottom of the list - but otherwise works OK