You cannot select multiple items in RadComboBox by default however you can follow this code library
if you want to implement a custom solution.
As to the RadListBox, there is multi select functionality
. Here is a sample about selecting the first and the third item using code:
|private void radButton1_Click(object sender, EventArgs e)
| this.radListBox1.SelectionMode = SelectionMode.MultiSimple;
You can also use this.radListBox1.SelectedItems
collection to select items instead of indices
I hope this helps. Please do not hesitate to write us back if you have further questions.
All the best,
the Telerik team