C# Code:

[Designer(typeof(MyComponentDesigner), typeof(IDesigner))]
[DefaultProperty("Object")]
public partial class ComponentCS : Component
{
   
   /// <summary>
   /// 嵌套的对象，打开属性编辑器可修改这个对象
   /// </summary>
   private MyObject _Object = new MyObject();
   
   public ComponentCS(IContainer container)
   : base()
   {
      container.Add(this);
   }
   
   /// <summary>
   /// 嵌套的对象，打开属性编辑器可修改这个对象
   /// </summary>
   [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
   [Editor(typeof(MyItemEditor), typeof(UITypeEditor))]
   [LocalizableAttribute(true)]
   [Category("Appearance")]
   [Description("MyObject类型对象")]
   public MyObject Object
   {
      get { return _Object; }
      set { _Object = value; }
   }
   
}

//来源:C/S框架网(www.csframework.com) QQ:1980854898

C# Code:


/// <summary>
/// 自定义设计器
/// </summary>
public class MyComponentDesigner : ComponentDesigner
{
   public MyComponentDesigner()
   : base()
   {
      // 添加"编辑Items"到右键菜单和智能标记中。
      DesignerVerb verb = new DesignerVerb("编辑Items", new EventHandler(OnDesignItems));
      this.Verbs.Add(verb);
   }
   
   private void OnDesignItems(object sender, EventArgs e)
   {
      this.DoDefaultAction();
   }
   
   // 1、可以设计Component的默认事件创建方法签名，并将用户的光标定位到该位置。
   // 2、也可以为Component添加双击时要进行的操作。
   public override void DoDefaultAction()
   {
      ComponentCS c = this.Component as ComponentCS;
      
      if (c.Object == null) c.Object = new MyObject();
      
      frmMyObjectEditor editor = new frmMyObjectEditor(c.Object);
      
      //调用属性编辑窗体编辑对象
      if (DialogResult.OK == editor.ShowDialog())
      {
         //取出Object属性的PropertyDescriptor，派生类：ReflectPropertyDescriptor
         //PropertyDescriptor:是抽象基类.
         PropertyDescriptor pd = TypeDescriptor.GetProperties(c)["Object"];
         
         //当设计器修改了对象的属性，持久化属性的值到Designer.cs文件。
         if (pd != null) pd.SetValue(c, c.Object);
      }
      
      editor.Dispose();
   }
}

//来源:C/S框架网(www.csframework.com) QQ:1980854898

C# Code:

 //取出Object属性的PropertyDescriptor，派生类：ReflectPropertyDescriptor
         //PropertyDescriptor:是抽象基类.
         PropertyDescriptor pd = TypeDescriptor.GetProperties(c)["Object"];
         
         //当设计器修改了对象的属性，持久化属性的值到Designer.cs文件。
         if (pd != null) pd.SetValue(c, c.Object);