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

C#

    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;
    	}
    }