改變 propertygrid 控件的編輯風格（3）——打開對話框

張昱[email protected] 效果：

適用場合：

1、   打開文件、打印設置等通用對話框

2、   打開特定的對話框

步驟一：定義從uitypeeditor 派生的類，以 openfiledialog 對話框為例，示例代碼如下：

using system;

using system.windows.forms;

using system.drawing.design;

using system.windows.forms.design;

namespace blog.csdn.net.zhangyuk

{

     /// <summary>

     /// imsopenfileinpropertygrid 的摘要說明。

     /// </summary>

     public class propertygridfileitem : uitypeeditor

     {

         public override uitypeeditoreditstyle geteditstyle(

system.componentmodel.itypedescriptorcontext context)

         {

              return uitypeeditoreditstyle.modal;

         }

         public override object editvalue(

system.componentmodel.itypedescriptorcontext context,

system.iserviceprovider provider,

object value)

         {           

              iwindowsformseditorservice edsvc = (iwindowsformseditorservice)

provider.getservice(typeof(iwindowsformseditorservice));

              if( edsvc != null )

              {

                   // 可以打開任何特定的對話框

                   openfiledialog dialog = new openfiledialog();

                   dialog.addextension = false;

                   if( dialog.showdialog().equals(dialogresult.ok) )

                   {

                       return dialog.filename;

                   }

              }

              return value;

         }

     }

}

步驟二：編輯屬性類，指定編輯屬性。示例如下：

namespace blog.csdn.net.zhangyuk

{

         public class someproperties

     {

         private string _finished_time   = "";

                   ……

         // 文件

         string _filename = "";

         [

              description("文件打開對話框"),

              category("屬性"),

            editorattribute(typeof(propertygridfileitem),

typeof(system.drawing.design.uitypeeditor))

         ]

         public string 文件

         {

              get { return _filename; }

              set { _filename = value;}

         }

         ……

         }

}

步驟三：設置propertygrid的屬性對象。示例如下：

         private void form1_load(object sender, system.eventargs e)

         {

            this.propertygrid1.selectedobject = new someproperties();

         }