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MultiSelectComboBoxColumn in Q1 2011

6 Answers 125 Views

GridView

This is a migrated thread and some comments may be shown as answers.

6 Answers, 1 is accepted

answered on 27 May 2011, 01:47 AM

Hi Telerik

I got what I needed partially working as outlined in the code below

I am stuck on two issues:
1. How best to capture the selections and deselections. I want to create a list of the selected values.
2. How to stop the editor from closing after a check box has been checked/unchecked

Thanks
Ian

private void rgvParameters_EditorRequired(object sender, EditorRequiredEventArgs e)

{

if (e.EditorType == typeof(RadDropDownListEditor))

{

e.Editor = new MyDropDownListEditor();

}

}

public class MyDropDownListEditor:RadDropDownListEditor 
{ 
    protected override RadElement CreateEditorElement() 
    { 
        return new MyDropDownListEditorElement(); 
    } 
      
}

public class MyDropDownListEditorElement:RadDropDownListEditorElement

{

protected override void OnLoaded()

{

base.OnLoaded();

this.ListElement.CreatingVisualItem += new CreatingVisualListItemEventHandler(ListElement_CreatingVisualItem);

}

private void ListElement_CreatingVisualItem(object sender, CreatingVisualListItemEventArgs args)

{

RadListVisualItem visualItem = new RadListVisualItem();

visualItem.Padding = new Padding(12, 0, 0, 0);

//visualItem.NumberOfColors = 1;

//visualItem.BackColor = Color.Yellow;

RadCheckBoxElement chkBox = new RadCheckBoxElement();

chkBox.MinSize = new Size(12, 12);

chkBox.MaxSize = chkBox.MinSize;

chkBox.ToggleStateChanged += new StateChangedEventHandler(chkBox_ToggleStateChanged);

visualItem.Children.Add(chkBox);

args.VisualItem = visualItem;

}

private void chkBox_ToggleStateChanged(object sender, StateChangedEventArgs args)

{

Debug.WriteLine("CheckPressed");

}

answered on 28 May 2011, 09:35 AM

RadDropDownListCustom.zip

Hi Ian,

Thank you for writing.

RadGridView has undergone a significant change since 2009, including many major upgrade and improvements, together with many new features. Due to these changes, as you have noticed, the approach of getting a multi select combo box should be modified. Please find attached a sample project which demonstrates how you can implement such a scenario. Please note that this is a not fully featured solution and you may need to modify it according to your specific needs.

I hope you find this information helpful.

Greetings,
Stefan
the Telerik team

Q1’11 SP1 of RadControls for WinForms is available for download; also available is the Q2'11 Roadmap for Telerik Windows Forms controls.