Hide the Drop-Down Button of of RadMultiColumnComboBox

Environment

Product Version	2024.1.312
Product	RadMultiColumnComboBox for WPF

Description

How to hide the drop-down button of the RadMultiColumnComboBox control.

Solution

Subscribe to the Loaded event of RadMultiColumnComboBox and utilize the ChildrenOfType method to retrive the RadDropDownButton element with x:Name="PART_DropDownButton". Then, set its Visibility property to Visibility.Collapsed.

Retrieve the RadDropDownButton element on the Loaded event of RadMultiColumnComboBox

private void RadMultiColumnComboBox_Loaded(object sender, RoutedEventArgs e) 
{ 
    var mccb = (RadMultiColumnComboBox)sender; 
 
    var dropDownButton = mccb.ChildrenOfType<RadDropDownButton>().FirstOrDefault(x => x.Name == "PART_DropDownButton"); 
    if (dropDownButton != null) 
    { 
        dropDownButton.Visibility = Visibility.Collapsed; 
    } 
}