Asp.net 2.0 自定义控件开发[创建自定义浮动菜单FloadMenu控件][示例代码下载]

(一). 概述

1. 当鼠标悬浮到控件对象上, 会弹出此自定义控件.

2. 具有通用性,只要支持 onmouseenter/onmouseleave 等几个事件方法的目标控件都可以使用此控件.

3. 此控件与前面自定义控件[右击弹出菜单]控件有些类似, 区别是这个控件客户端JavaScript部分有些麻烦.

(二). 运行如图

(三). 用法

1. 将FloatTraceMenu控件Dll添加引用到Web站点工程中

2. 从工具箱拖动一个FloatTraceMenu控件和另一个支持onmouseenter/onmouseleave 等事件

的控件到设计器中, 比如: <GridView id="GridView1" runat="server" /> <img id="img' /> 等

3. 设置FloatTraceMenu的属性指向目标控件ID, 比如: TargetControl=GridView1

4. F5运行即可

(四). 完整代码

1. 主控件FloatTraceMenu.cs代码

1 /// <summary>
2 /// Author:[ChengKing(ZhengJian)]
3 /// Blog:Http://blog.csdn.net/ChengKing
4 /// Date:2007/4/3
5 /// </summary>
6 [DefaultProperty( " TargetControl " )]
7 [ToolboxData( " <{0}:FloatTraceMenurunat=server></{0}:FloatTraceMenu> " )]
8 // [Designer(typeof(System.ComponentModel.Design.DesignerCollection))]
9 public class FloatTraceMenu:Control,IComponent
10 {
11
12 [Bindable( true )]
13 [Category( " Appearance " )]
14 [DefaultValue( " [FloatTraceMenu\ " FloatTraceMenu1\ " ] " )]
15 [Localizable( true )]
16 public string Text
17 {
18 get
19 {
20 Strings = (String)ViewState[ " Text " ];
21 return ((s == null ) ? String.Empty:s);
22 }
23
24 set
25 {
26 ViewState[ " Text " ] = value;
27 }
28 }
29
30 [Bindable( true )]
31 [Category( " Appearance " )]
32 [DefaultValue( "" )]
33 [Description( " 设置此控件的寄主控件 " )]
34 [TypeConverter( typeof (ControlIDConverter))]
35 public string TargetControl
36 {
37 get
38 {
39 Strings = (String)ViewState[ " TargetControl " ];
40 return ((s == null ) ? String.Empty:s);
41 }
42 set
43 {
44 ViewState[ " TargetControl " ] = value;
45 }
46 }
47
48 protected override void Render(HtmlTextWriterwriter)
49 {
50 if (DesignMode)
51 {
52 this .Controls.Clear();
53 LiteralControllc = new LiteralControl();
54 lc.Text = this .Text;
55 this .Controls.Add(lc);
56 }
57 base .Render(writer);
58 }
59
60 protected override void CreateChildControls()
61 {
62 base .CreateChildControls();
63 }
64
65 protected override void OnPreRender(EventArgse)
66 {
67
68 if ( ! Page.ClientScript.IsClientScriptBlockRegistered( " BuildMenu " ))
69 {
70 Page.ClientScript.RegisterClientScriptBlock( this .GetType(), " BuildMenu " ,
71 " <scripttype='text/javascript'src='JScript.js'></script> " );
72 }
73
74 // GridView增加FloatMenu
75 ControltargetControl = this .FindControl(TargetControl);
76
77 // 给GridView头增加FloatMenu
78 // ControltargetControl=this.FindControl(TargetControl).Controls[0].Controls[0];
79
80 StringBuilderstrInitScript = new StringBuilder();
81 if (targetControl != null )
82 {
83 strInitScript.Append( " <scripttext/javascript> " );
84 strInitScript.Append( " writeStyle();makeMenu();varobj; " );
85 strInitScript.Append( " if(document.all&&window.print) " );
86 strInitScript.Append( " { " );
87 strInitScript.Append( " varobjClientId=' " + targetControl.ClientID + " '; " );
88 strInitScript.Append( " if(objClientId!=null) " );
89 strInitScript.Append( " { " );
90 strInitScript.Append( " obj=document.getElementById(objClientId); " );
91 strInitScript.Append( " document.onclick=forcehideMenu; " );
92 // strInitScript.Append("obj.onmouseover=showMenu;");
93 strInitScript.Append( " obj.onmouseenter=showMenu; " );
94 // strInitScript.Append("obj.onmouseout=hideMenu;");
95 strInitScript.Append( " obj.onmouseleave=hideMenu; " );
96 strInitScript.Append( " obj.onmousemove=moveMenu; " );
97 strInitScript.Append( " obj.oncontextmenu=showMenu; " );
98 strInitScript.Append( " } " );
99 strInitScript.Append( " else{alert('PleaseSetTargetControlProperty!')} " );
100 strInitScript.Append( " } " );
101 strInitScript.Append( " </script> " );
102 }
103 else
104 {
105 strInitScript.Append( " <scripttext/javascript> " );
106 strInitScript.Append( " alert('PleaseSetTargetControlProperty!'); " );
107 strInitScript.Append( " </script> " );
108 }
109 if ( ! Page.ClientScript.IsStartupScriptRegistered( " InitScript " ))
110 {
111 Page.ClientScript.RegisterStartupScript( this .GetType(), " InitScript " ,
112 strInitScript.ToString());
113 }
114
115 base .OnPreRender(e);
116 }
117 }

2. 测试页面文件default.aspx代码

1<div>
2<asp:GridViewID="GridView1"runat="server"</asp:GridView>
3<cc1:FloatTraceMenu ID="FloatTraceMenu1"runat="server"TargetControl= "GridView1">

</cc1:FloatTraceMenu>
4</div>

(五). 示例代码下载

http://www.cnblogs.com/Files/MVP33650/自定义控件开发--[浮动工具条].rar

[扩展]可以自定义(手动编程)浮动菜单的款项

http://www.cnblogs.com/Files/MVP33650/自定义控件开发--[浮动工具条--可手动编码自定义菜单项]V2.rar

(六). 控件开发其它相关文章:

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