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Asp.net 2.0 自定义控件开发[创建自定义右键PopupMenu控件][示例代码下载]

技术2022-05-11  0


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(一). 概述

        1. 当鼠标悬浮到控件对象上, 右击, 会弹出此自定义控件.

        2. 仅当控件支持oncontextmenu事件. 另外, 与其功能类似的控件[浮动Toobar自定义控件]

(二). 运行如图

  

(三). 用法

   1. 将PopupTraceMenur控件Dll添加引用到Web站点工程中

   2. 从工具箱拖动一个PopupTraceMenu控件和另一个支持oncontextmenu事件的控件到设计器中,

       比如:

   3. 设置PopupTraceMenur的属性TargetControl=GridView1

   4. F5运行即可

(四). 完整代码

    1. 主控件PopupTraceMenu.cs代码

  1    ///     2     /// Author: ChengKing(ZhengJian)  3     ///    4      [DefaultProperty( " TargetControl " )]   5      [ToolboxData( " <{0}:PopupTraceMenu runat=server> " )]   6       // [Designer(typeof(System.ComponentModel.Design.DesignerCollection))]   7       public   class  PopupTraceMenu : Control, IComponent   8      {   9   10          [Bindable( true )]  11          [Category( " Appearance " )]  12          [DefaultValue( " [PopupTraceMenu / " PopupTraceMenu11/ " ] " )]  13          [Localizable( true )]  14           public   string  Text  15          {  16               get  17              {  18                  String s  =  (String)ViewState[ " Text " ];  19                   return  ((s  ==   null ?  String.Empty : s);  20              }  21   22               set  23              {  24                  ViewState[ " Text " =  value;  25              }  26          }  27   28          [Bindable( true )]  29          [Category( " Appearance " )]  30          [DefaultValue( "" )]  31          [Description( " 设置此控件的寄主控件 " )]  32          [TypeConverter( typeof (ControlIDConverter))]   33           public   string  TargetControl  34          {  35               get  36              {  37                  String s  =  (String)ViewState[ " TargetControl " ];  38                   return  ((s  ==   null ?  String.Empty : s);                                                  39              }  40               set  41              {  42                  ViewState[ " TargetControl " =  value;  43              }  44          }  45   46           protected   override   void  Render(HtmlTextWriter writer)  47          {  48               if  (DesignMode)  49              {  50                   this .Controls.Clear();                  51                  LiteralControl lc  =   new  LiteralControl();  52                  lc.Text  =   this .Text;                  53                   this .Controls.Add(lc);                  54              }  55               base .Render(writer);              56          }  57   58           protected   override   void  CreateChildControls()  59          {              60               base .CreateChildControls();  61          }  62   63           protected   override   void  OnPreRender(EventArgs e)  64          {  65   66               if  ( ! Page.ClientScript.IsClientScriptBlockRegistered( " BuildMenu " ))  67              {  68                  Page.ClientScript.RegisterClientScriptBlock( this .GetType(),  " BuildMenu " ,  69                       " <script type='text/javascript' src='JScript.js'></script> " );  70              }  71   72              Control targetControl  =   this .FindControl(TargetControl);  73   74              StringBuilder strInitScript  =   new  StringBuilder();  75               if  (targetControl  !=   null )  76              {                  77                  strInitScript.Append( " <script text/javascript>  " );  78                  strInitScript.Append( "    writeStyle(); makeMenu();  " );  79                  strInitScript.Append( "    if( document.all&&window.print )  " );  80                  strInitScript.Append( "    {  " );  81                  strInitScript.Append( "       var objClientId = ' "   +  targetControl.ClientID  +   " '; " );  82                  strInitScript.Append( "       if(objClientId != null)  " );  83                  strInitScript.Append( "       { " );  84                  strInitScript.Append( "          var obj = document.getElementById(objClientId); " );  85                  strInitScript.Append( "          document.onclick = hideMenu;  " );  86                  strInitScript.Append( "          obj.oncontextmenu = showMenu; " );  87                  strInitScript.Append( "       } " );  88                  strInitScript.Append( "       else {alert('Please Set TargetControl Property!')} " );  89                  strInitScript.Append( "    }  " );  90                  strInitScript.Append( " </script> " );  91              }  92               else  93              {  94                  strInitScript.Append( " <script text/javascript>  " );  95                  strInitScript.Append( "    alert('Please Set TargetControl Property!');  " );  96                  strInitScript.Append( " </script> " );  97              }  98               if  ( ! Page.ClientScript.IsStartupScriptRegistered( " InitScript " ))  99              { 100                  Page.ClientScript.RegisterStartupScript( this .GetType(),  " InitScript " , 101                      strInitScript.ToString()); 102              } 103              104               base .OnPreRender(e); 105          }         106      }

    2. 测试页面文件default.aspx代码

1 <div>2    <asp:GridView ID="GridView1" runat="server"  asp:GridView>  3    <cc1:PopupTraceMenu ID="PopupTraceMenu1" runat="server" TargetControl= "GridView1">

  cc1:PopupTraceMenu>                      4  div>

(五). 示例代码下载

       http://www.cnblogs.com/Files/MVP33650/自定义控件开发--[右键菜单].rar

 (六). 控件开发其它相关文章:

        http://blog.csdn.net/ChengKing/category/288694.aspx

 

 

 

 

 

 

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