Does anyone have an example of how to use a MultiColumnComboBox with RadControls for WinForms 2010 Q2?  I can't seem to find an example in the demos that came with it and I'm not able to get it working.  My code is posted below.  Basically my grid (the comboelement if I'm reading correctly) never displays.  The first value in the datatable displays in the text box but no grid shows up.  I can press the down arrow and the value changes but still never displays.  Can anyone help me?

 

 

 

//set up data

 

 

 

Data objData = new Data();

 

 

DataTable dtCarriers = objData.GetCarriers();

 

bindingSource1.DataSource = dtCarriers;

 

 

//setup drop down grid display options

 

rmccbCarrier.AutoSizeDropDownToBestFit =

true;

 

rmccbCarrier.DisplayMember =

"CARRIER_CODE";

 

 

RadMultiColumnComboBoxElement multiColumnComboElement = this.rmccbCarrier.MultiColumnComboBoxElement;

 

multiColumnComboElement.DropDownSizingMode =

SizingMode.UpDownAndRightBottom;

 

multiColumnComboElement.DropDownMinSize =

new Size(420, 300);

 

 

this.rmccbCarrier.MultiColumnComboBoxElement.AutoCompleteMode = AutoCompleteMode.None;

 

 

this.rmccbCarrier.DropDownStyle = RadDropDownStyle.DropDown;

 

 

FilterDescriptor descriptor = new FilterDescriptor(this.rmccbCarrier.DisplayMember, FilterOperator.StartsWith, string.Empty);

 

 

this.rmccbCarrier.EditorControl.FilterDescriptors.Add(descriptor);

 

 

this.rmccbCarrier.DropDownStyle = RadDropDownStyle.DropDown;

 

rmccbCarrier.AutoFilter =

true;

 

rmccbCarrier.MultiColumnComboBoxElement.AutoCompleteMode =

AutoCompleteMode.None;