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]

(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: <GridView id="GridView1" runat="server" />

   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    ///   <summary>
  2       ///  Author: ChengKing(ZhengJian)
  3       ///   </summary>
  4      [DefaultProperty( " TargetControl " )]
  5      [ToolboxData( " <{0}:PopupTraceMenu runat=server></{0}:PopupTraceMenu> " )]
  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://files.cnblogs.com/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