一个自定义窗口属性的控件(C#)

using System;
using System.ComponentModel;
using System.ComponentModel.Design.Serialization;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Globalization;
using System.Reflection;
using System.Windows.Forms;
using System.Windows.Forms.Design;
using System.Drawing.Design;

namespace TestInstanceDescriptor
{

 [TypeConverter(typeof(MySizeTypeConverter))]
 public class MySize
 {
  private int _x,_y;
  public readonly static MySize Empty;

  static MySize()
  {
   Empty = new MySize();
  }

  public MySize()
  {
  }

  public MySize(int x,int y)
  {
   _x = x;
   _y = y;
  }

  public int X
  {
   get
   {
    return _x;
   }
   set
   {
    _x = value;
   }
  }

  public int Y
  {
   get
   {
    return _y;
   }
   set
   {
    _y = value;
   }
  }

  public override string ToString()
  {
   return String.Format("{0},{1}",_x.ToString(),_y.ToString());
  }
 }

 public class MySizeTypeConverter:TypeConverter
 {
  public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
  {
   if(sourceType == typeof(string))
    return true;
   else
    return base.CanConvertFrom(context,sourceType);
  }

  public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
  {
   if(destinationType == typeof(string) ||
    destinationType == typeof(InstanceDescriptor))
    return true;
   else
    return base.CanConvertTo(context,destinationType);
  }

  public override object ConvertFrom(ITypeDescriptorContext context,
   System.Globalization.CultureInfo culture, object value)
  {
   if (value == null)
   {
    return null;
   }
   if (!(value is string))
   {
    return base.ConvertFrom(context, culture, value);
   }
   string str = ((String)value).Trim();
   if (str.Length == 0)
   {
    return MySize.Empty;
   }
   char[] splitchar = {','};
   string[] values = ((string)value).Split(splitchar);
   if(values.Length != 2)
    return MySize.Empty;
   try
   {
    int x = Convert.ToInt32(values[0]);
    int y = Convert.ToInt32(values[1]);
    MySize s = new MySize();
    s.X = x;
    s.Y = y;
    return s;
   }
   catch(FormatException)
   {
    return MySize.Empty;
   }
  }

  public override object ConvertTo(ITypeDescriptorContext context,
   System.Globalization.CultureInfo culture, object value, Type destinationType)
  {
   if(destinationType == typeof(InstanceDescriptor))
   {
    MySize o = (MySize)value;
    Type intType = typeof(int);
    MemberInfo mi = typeof(MySize).GetConstructor(new Type[]{intType,intType});
    object[] args = new object[] {o.X,o.Y};
    return new InstanceDescriptor(mi,args);
   }
   if (destinationType != typeof(string))
   {
    return base.ConvertTo(context, culture, value, destinationType);
   }
   if (value != null)
   {
    MySize size = (MySize)value;
    if(size != MySize.Empty)
     return size.ToString();
   }
   return String.Empty;
  }
 }

 /// <summary>
 /// Summary description for InstDescLabe.
 /// </summary>
 public class InstDescLabel:System.Web.UI.WebControls.Label
 {
  [EditorAttribute(typeof(MySizeEditor),typeof(UITypeEditor))]
  public MySize NewSize
  {
   get
   {
    object o = ViewState["Size"];
    if(o == null)
     return MySize.Empty;
    return (MySize)o;
   }
   set
   {
    ViewState["Size"] = value;
   }
  }

 
  public InstDescLabel()
  {
   //
   // TODO: Add constructor logic here
   //
  }
 }

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

  public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
  {
   IWindowsFormsEditorService wfe = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
   MySize o = (MySize)value;

   if(wfe != null)
   {
    LabelComponentEditorForm form = new LabelComponentEditorForm(o.X,o.Y);
    using(form)
    {
     wfe.DropDownControl(form);
     return new MySize(form.X,form.Y);
    }
   }
   return base.EditValue (context, provider, value);
  }

 }

 public class LabelComponentEditorForm : System.Windows.Forms.UserControl //System.Windows.Forms.Form
 {
  private System.Windows.Forms.Label label1;
  private System.Windows.Forms.TextBox textBox1;
  private System.Windows.Forms.Button button1;

  private System.Windows.Forms.Label label2;
  private System.Windows.Forms.TextBox textBox2;
  
  public int X
  {
   get
   {
    return Convert.ToInt32(this.textBox1.Text);
   }
  }

  public int Y
  {
   get
   {
    return Convert.ToInt32(this.textBox2.Text);
   }
  }
  /// <summary>
  /// 必需的设计器变量。
  /// </summary>
  private System.ComponentModel.Container components = null;

  public LabelComponentEditorForm()
  {
   //
   // Windows 窗体设计器支持所必需的
   // 
   InitializeComponent();

   //
   // TODO: 在 InitializeComponent 调用后添加任何构造函数代码
   //
  }

  public LabelComponentEditorForm(int x,int y) : this()
  {
   this.textBox1.Text = x.ToString();
   this.textBox2.Text = y.ToString();
  }

  /// <summary>
  /// 清理所有正在使用的资源。
  /// </summary>
  protected override void Dispose( bool disposing )
  {
   if( disposing )
   {
    if (components != null)
    {
     components.Dispose();
    }
   }
   base.Dispose( disposing );
  }

  #region Windows 窗体设计器生成的代码
  /// <summary>
  /// 设计器支持所需的方法 - 不要使用代码编辑器修改
  /// 此方法的内容。
  /// </summary>
  private void InitializeComponent()
  {
   this.label1 = new System.Windows.Forms.Label();
   this.textBox1 = new System.Windows.Forms.TextBox();
   this.button1 = new System.Windows.Forms.Button();
   this.label2 = new System.Windows.Forms.Label();
   this.textBox2 = new System.Windows.Forms.TextBox();
   this.SuspendLayout();
   //
   // label1
   //
   this.label1.Location = new System.Drawing.Point(8, 16);
   this.label1.Name = "label1";
   this.label1.Size = new System.Drawing.Size(88, 24);
   this.label1.TabIndex = 0;
   this.label1.Text = "请输入提示X：";
   //
   // textBox1
   //
   this.textBox1.Location = new System.Drawing.Point(96, 14);
   this.textBox1.Name = "textBox1";
   this.textBox1.Size = new System.Drawing.Size(112, 21);
   this.textBox1.TabIndex = 1;
   this.textBox1.Text = "";
   //
   // button1
   //
   this.button1.Location = new System.Drawing.Point(120, 80);
   this.button1.Name = "button1";
   this.button1.Size = new System.Drawing.Size(80, 24);
   this.button1.TabIndex = 2;
   this.button1.Text = "OK";
   this.button1.Click += new System.EventHandler(this.button1_Click);
   //
   // label2
   //
   this.label2.Location = new System.Drawing.Point(8, 48);
   this.label2.Name = "label2";
   this.label2.Size = new System.Drawing.Size(88, 24);
   this.label2.TabIndex = 0;
   this.label2.Text = "请输入提示Y：";
   //
   // textBox2
   //
   this.textBox2.Location = new System.Drawing.Point(96, 48);
   this.textBox2.Name = "textBox2";
   this.textBox2.Size = new System.Drawing.Size(112, 21);
   this.textBox2.TabIndex = 1;
   this.textBox2.Text = "";
   //
   // LabelComponentEditorForm
   //
   //this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
   this.ClientSize = new System.Drawing.Size(216, 114);
   this.Controls.Add(this.button1);
   this.Controls.Add(this.textBox1);
   this.Controls.Add(this.label1);
   this.Controls.Add(this.label2);
   this.Controls.Add(this.textBox2);
   //this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedToolWindow;
   this.Name = "LabelComponentEditorForm";
   this.Text = "Form1";
   this.ResumeLayout(false);

  }
  #endregion

  

  private void button1_Click(object sender, System.EventArgs e)
  {
   //this.Close();
  }
 }
}

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