Resize popup for ComboBoxColumn to fit items

[Justin]

Hi,

Can I resize the popup in a ComboBoxColumn to fit the items in the list? I know I can use the:

Popup.MinimumSize
Popup.Size

 But is there a way to autosize to bestfit the contents of the list?

Kind Regards
Justin

[Ivan Petrov]

Hi Justin,

Thank you for writing.

You can achieve this by setting the DropDownWidth of the editor's element. You have to first measure the width you will need and then assign it to the property. Here is how to do this inside the CellEditorInitialized event:

private void radGridView1_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
  RadDropDownListEditor editor = e.ActiveEditor as RadDropDownListEditor;

  if (editor == null)
  {
    return;
  }

  RadDropDownListElement element = editor.EditorElement as RadDropDownListEditorElement;

  int scrolBarWidth = 0;

  if (element.DefaultItemsCountInDropDown < element.Items.Count)
  {
    scrolBarWidth = 35;
  }

  foreach (RadListDataItem item in element.Items)
  {
    string text = item.Text;
    Size size = TextRenderer.MeasureText(text, element.Font);

    if (element.DropDownWidth < size.Width)
    {
      element.DropDownWidth = size.Width + scrolBarWidth;
    }
  }
}

I hope this will be useful for you. Should you have further questions, I would be glad to help.

Kind regards,
Ivan Petrov
the Telerik team