Question

我创建了usercontrol GridEx：UserControl。在那个控件上我推出了GridControl（DevExpress数据网格控件）。我创建了Property DataGrid，它返回内部数据网格控件（之前已添加）如何为DataGrid启用设计支持？我试着把

[Designer("DevExpress.XtraGrid.Design.GridControlDesigner,
    DevExpress.XtraGrid.v8.2.Design", typeof(IDesigner))]

但我收到此错误：无法创建组件'DataGridControl' 错误消息如下：

System.NullReferenceException: Object reference not set to an instance of an object.
  at DevExpress.XtraGrid.Design.GridControlDesigner.Initialize(IComponent component)
  at System.ComponentModel.Design.DesignerHost.AddToContainerPostProcess(IComponent component, String name, IContainer containerToAddTo)
  at System.ComponentModel.Design.DesignerHost.Add(IComponent component, String name)
  at System.ComponentModel.Design.DesignerHost.System.ComponentModel.Design. IDesignerHost.CreateComponent(Type componentType, String name)
   at System.ComponentModel.Design.DesignerHost.System.ComponentModel. Design.IDesignerHost.CreateComponent(Type componentType)
   at System.Drawing.Design.ToolboxItem.CreateComponentsCore(IDesignerHost host)
   at System.Drawing.Design.ToolboxItem.CreateComponentsCore(IDesignerHost host, IDictionary defaultValues)
   at System.Drawing.Design.ToolboxItem.CreateComponents(IDesignerHost host, IDictionary defaultValues)
   at System.Windows.Forms.Design.OleDragDropHandler.Cre...

Answer 1

尝试从DevExpress网格控件而不是'UserControl'类派生用户控件。

Answer 2

解决方案可以在这里建立：

http://www.devexpress.com/kb=A577

在Visual Studio 2008中为用户控件启用设计时支持

2 个答案: