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:

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">