效果：



适用场合：


编辑日期类型数据



步骤一：定义从UITypeEditor 派生的类，示例如下：

using System;

using System.Windows.Forms;

using System.Drawing.Design;

using System.Windows.Forms.Design;


namespace blog.csdn.net.zhangyuk

{
/// <summary>

/// 在 PropertyGrid 上显示日期控件

///

/// </summary>


public class PropertyGridDateItem : UITypeEditor

{

MonthCalendar dateControl = new MonthCalendar();


public PropertyGridDateItem()
{

   dateControl.MaxSelectionCount = 1;

}


public override UITypeEditorEditStyle GetEditStyle(

System.ComponentModel.ITypeDescriptorContext context)

{

   return UITypeEditorEditStyle.DropDown;

}


public override object EditValue(

   System.ComponentModel.ITypeDescriptorContext context,

   System.IServiceProvider provider,

   object value)

{

try

{
   IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)

   provider.GetService(typeof(IWindowsFormsEditorService));

if( edSvc != null )

{

if( value is string )
  {
    dateControl.SelectionStart = DateTime.Parse( value as String );

    edSvc.DropDownControl( dateControl );

    return dateControl.SelectionStart.ToShortDateString();

   }

else if( value is DateTime )

{

   dateControl.SelectionStart = (DateTime)value;

   edSvc.DropDownControl( dateControl );

   return dateControl.SelectionStart;
 
      }

   }

}

catch( Exception ex )

  {
    System.Console.WriteLine( "PropertyGridDateItem Error : " + ex.Message );

       return value;

      }

      return value;

     }

   }

}


步骤二：编辑属性类，指定编辑属性。示例如下：

namespace blog.csdn.net.zhangyuk

{

public class SomeProperties

{
   private string _finished_time = "";

   ……

   Description("完成时间"),

   Category("属性"),

   EditorAttribute(typeof(PropertyGridDateItem),

   typeof(System.Drawing.Design.UITypeEditor))


  public String 完成时间

   {
      get { return _finished_date; }

      set { _finished_date = value;}

    }

……

  }

}


步骤三：设置PropertyGrid的属性对象。示例如下：

private void Form1_Load(object sender, System.EventArgs e)
{
   this.propertyGrid1.SelectedObject = new SomeProperties();
 }