C# telerik winforms radDropDownList 多选

Question

I have enabled multiple selections in the radDropDownList with below code.

radDropDownList1.DropDownListElement.SelectionMode = SelectionMode.MultiExtended;

This list has 10 options and each user can choose one to 10 of them Now I want to retrieve the user selection that I saved in an array list ArrayList UserChoose = new ArrayList();

UserChoose = getUserChoose("username");

How can I through the code,Return user selections to the radDropDownList?

radDropDownList.Select = UserChoose ?

Answer 1

There is 2 ways how you can achive that. It will be little complex but it will work for you I believe.
Way 1:
As I think, you might not able to do that using only radDropDownList . If still you want to do that using radDropDownList then you have to customized radDropDownList like in the telerik dicussion forum . Source code link is here .

Way 2:
You can use RadMultiColumnComboBox . It will be easy to implement. At the same time it has more features. Check link of telerik over here=> RadMultiColumnComboBox Documentation .

Note: Personally I support the latter one rather than the former one.So, way 2 is much more effective.

Answer 2

The easiest replacement for a Windows Forms dropdown with multiple selection using Telerik is the RadCheckedDropDownList control, that is intended to provide that particular functionality.

It is available since version 2018.1.116.