RadComobox Clear

[mohamed]

In RadCombobox i bind tree View how i clear the selected tree view value

Thanks,
Mohamed.

[mohamed]

I'm clear like that .
            BrowsebyCategory.Text = "";
            BrowsebyCategory.SelectedValue = "";
            BrowsebyCategory.ClearSelection();
            BrowsebyCategory.Items.Clear();

After clear i newly load that ramcobobox  inside radtreeview

RadTreeView radtreeview = (RadTreeView)BrowsebyCategory.Items[0].FindControl("CategoryTreeView");

Error come on

Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

Thanks,
Mohamed.