PropertyGrid中的ContextMenuStrip

Question

顶级控件无法添加到控件请告诉我，如何在PropertyGrid中显示ContextMenuStrip？为此，我用这个代码：

public class SaveFileNameEditor : UITypeEditor 
    { 
     public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context) 
     { 
      return UITypeEditorEditStyle.DropDown; 
     } 

     public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value) 
     { 
      IWindowsFormsEditorService FileEditor = 
      provider.GetService(typeof(IWindowsFormsEditorService)) as 
      IWindowsFormsEditorService; 
      ContextMenuStrip MenuList = null; 
      ToolStripMenuItem MenuItem = null; 
      if (FileEditor != null) 
      { 
       MenuList = new ContextMenuStrip(); 
       MenuItem = new ToolStripMenuItem("Add File..."); 
       MenuList.Items.Add(MenuItem); 
       MenuItem = new ToolStripMenuItem("Save File ..."); 
       MenuList.Items.Add(MenuItem); 
       MenuItem = new ToolStripMenuItem("Delete File ..."); 
       MenuList.Items.Add(MenuItem); 

       FileEditor.DropDownControl(MenuList); 
       MenuList.Show(); 
      } 
      return value; 
     }  
    } 

，但我得到错误信息“顶级控件不能被添加到控制”上线

FileEditor.DropDownControl(MenuList); 

Answer 1

我已经找到了解决办法。取而代之的

FileEditor.DropDownControl(MenuList); 

把

Point MenuCoords = (System.Windows.Forms.Control.MousePosition); 
MenuList.Show(MenuCoords);