protected string EditValueHelper(ITypeDescriptorContext context, IServiceProvider provider,
string value, IList <string> valueList)
{
if ((value == null) || (valueList == null))
{
throw new ArgumentNullException();
}
if (provider != null)
{
IWindowsFormsEditorService editorService = provider.GetService(typeof(IWindowsFormsEditorService))
as IWindowsFormsEditorService;
if (editorService == null)
{
return(value);
}
// prepare list
editor.Begin(editorService, value, valueList);
// show drop-down now
editorService.DropDownControl(editor);
// now we take the result
value = editor.Value;
// reset editor
editor.End();
}
return(value);
}
