C#.Net组件开发(高级篇) - 自定义CollectionEditor编辑器

        //

        // 摘要:

        //     Gets a collection that contains all the columns in the control.

        //

        // 返回结果:

        //     The System.Windows.Forms.DataGridViewColumnCollection that contains all the

        //     columns in the System.Windows.Forms.DataGridView control.

        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]

        [Editor("System.Windows.Forms.Design.DataGridViewColumnCollectionEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))]

        [MergableProperty(false)]

        public DataGridViewColumnCollection Columns { get; }

    // 摘要:

    //     Represents a collection of System.Windows.Forms.DataGridViewColumn objects

    //     in a System.Windows.Forms.DataGridView control.

    [ListBindable(false)]

    public class DataGridViewColumnCollection : BaseCollection, IList, ICollection, IEnumerable

    {
    }       

C# Code:

/// <summary>
/// 自定义CollectionEditor编辑器
/// </summary>
public class MyCollectionEditor : CollectionEditor
{
   public MyCollectionEditor(Type type)
   : base(type)
   { }
   
   /// <summary>
   /// 限制一次选一个实例
   /// </summary>
   /// <returns></returns>
   protected override bool CanSelectMultipleInstances()
   {
      return false;
   }
   
   /// <summary>
   /// 指定创建的对象类型
   /// </summary>
   /// <returns></returns>
   protected override Type CreateCollectionItemType()
   {
      return typeof(CSFrameworkNode);
   }
   
   protected override object CreateInstance(Type itemType)
   {
      //创建一个实例
      CSFrameworkNode o = (CSFrameworkNode)itemType.Assembly.CreateInstance(itemType.FullName);
      
      IDesignerHost host = (IDesignerHost)this.GetService(typeof(IDesignerHost));
      host.Container.Add(o);//重要！自动生成组件的设计时代码！
      
      //或者：
      //this.Context.Container.Add(o);//重要！自动生成组件的设计时代码！
      
      return o;
   }
   
   protected override void DestroyInstance(object instance)
   {
      base.DestroyInstance(instance);//重要！自动删除组件的设计时代码！
   }
   
}


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

C# Code:


/// <summary>
/// 自定义BaseCollection对象集合，实现IList接口
/// 如Object Collection Editor窗体的Add/Delete钮不可用是因为没有实现IList接口
/// </summary>
public class MyNodeCollection : BaseCollection, IList
{
   private ArrayList _innerList;
   
   public MyNodeCollection()
   {
      _innerList = new ArrayList();
   }
   
   protected override ArrayList List
   {
      get
      {
         return (ArrayList)_innerList;
      }
   }
   
   #region IList Members
   
   public int Add(object value)
   {
      return this.List.Add(value);
   }
   
   public void Clear()
   {
      this.List.Clear();
   }
   
   public bool Contains(object value)
   {
      return this.List.Contains(value);
   }
   
   public int IndexOf(object value)
   {
      return this.List.IndexOf(value);
   }
   
   public void Insert(int index, object value)
   {
      this.List.Insert(index, value);
   }
   
   public bool IsFixedSize
   {
      get { return this.List.IsFixedSize; }
   }
   
   public void Remove(object value)
   {
      this.List.Remove(value);
   }
   
   public void RemoveAt(int index)
   {
      this.List.RemoveAt(index);
   }
   
   public object this[int index]
   {
      get
      {
         return List[index];
      }
      set
      {
         List[index] = value;
      }
   }
   
   #endregion
}

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

C# Code:

/// <summary>
/// 用于测试打开Collection Editor的编辑器窗体
/// </summary>
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
[Editor(typeof(MyCollectionEditor), typeof(UITypeEditor))]//属性编辑器
public MyNodeCollection MyNodeCollection
{
   get
   {
      return _MyNodeCollection;
   }
   set
   {
      _MyNodeCollection = value;
   }
}

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