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

结合GridView使用的自定义控件,App_code/data.cs文件为数据生成文件PopupMenu_InGridView为演示文件夹、TraceMenu为自定义组建源码

自定义控件核心代码:

using System;
using System.ComponentModel;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace TraceMenu
{
    [DefaultProperty("TargetControl")]
    [ToolboxData("<{0}:PopupTraceMenu runat=server></{0}:PopupTraceMenu>")]
    //[Designer(typeof(System.ComponentModel.Design.DesignerCollection))]
    public class PopupTraceMenu : Control, IComponent
    {

        [Bindable(true)]
        [Category("Appearance")]
        [DefaultValue("[PopupTraceMenu \"PopupTraceMenu11\"]")]
        [Localizable(true)]
        public string Text
        {
            get
            {
                String s = (String)ViewState["Text"];
                return ((s == null) ? String.Empty : s);
            }

            set
            {
                ViewState["Text"] = value;
            }
        }

        [Bindable(true)]
        [Category("Appearance")]
        [DefaultValue("")]
        [Description("设置此控件的寄主控件")]
        [TypeConverter(typeof(ControlIDConverter))]
        public string TargetControl
        {
            get
            {
                String s = (String)ViewState["TargetControl"];
                return ((s == null) ? String.Empty : s);
            }
            set
            {
                ViewState["TargetControl"] = value;
            }
        }

        protected override void Render(HtmlTextWriter writer)
        {
            if (DesignMode)
            {
                this.Controls.Clear();
                LiteralControl lc = new LiteralControl();
                lc.Text = this.Text;
                this.Controls.Add(lc);
            }
            base.Render(writer);
        }

        protected override void CreateChildControls()
        {
            base.CreateChildControls();
        }

        protected override void OnPreRender(EventArgs e)
        {

            if (!Page.ClientScript.IsClientScriptBlockRegistered("BuildMenu"))
            {
                Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "BuildMenu",
                    "<script type='text/javascript' src='JScript.js'></script>");
            }

            Control targetControl = this.FindControl(TargetControl);

            StringBuilder strInitScript = new StringBuilder();
            if (targetControl != null)
            {
                strInitScript.Append("<script text/javascript> ");
                strInitScript.Append("   writeStyle(); makeMenu(); ");
                strInitScript.Append("   if( document.all&&window.print ) ");
                strInitScript.Append("   { ");
                strInitScript.Append("      var objClientId = '" + targetControl.ClientID + "';");
                strInitScript.Append("      if(objClientId != null) ");
                strInitScript.Append("      {");
                strInitScript.Append("         var obj = document.getElementById(objClientId);");
                strInitScript.Append("         document.onclick = hideMenu; ");
                strInitScript.Append("         obj.oncontextmenu = showMenu;");
                strInitScript.Append("      }");
                strInitScript.Append("      else {alert('Please Set TargetControl Property!')}");
                strInitScript.Append("   } ");
                strInitScript.Append("</script>");
            }
            else
            {
                strInitScript.Append("<script text/javascript> ");
                strInitScript.Append("   alert('Please Set TargetControl Property!'); ");
                strInitScript.Append("</script>");
            }
            if (!Page.ClientScript.IsStartupScriptRegistered("InitScript"))
            {
                Page.ClientScript.RegisterStartupScript(this.GetType(), "InitScript",
                    strInitScript.ToString());
            }

            base.OnPreRender(e);
        }
    }
}

涉及的Js代码:

调用代码1:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>

<%@ Register Assembly="TraceMenu" Namespace="TraceMenu" TagPrefix="cc1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Memory Xframe Company</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table cellpadding="0" cellspacing="0" border="1" bordercolor=black>
            <tr>
               <td>
                   <img id="img1" src="Images/Xframe.jpg" runat="server" />
               </td>
            </tr>
        </table>

        <br />
        <br />
        <cc1:popuptracemenu id="PopupTraceMenu1" runat="server" TargetControl="img1"></cc1:popuptracemenu>
    </div>
    </form>
</body>
</html>

调用代码2:

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<%@ Register Assembly="Microsoft.ReportViewer.WebForms, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"
    Namespace="Microsoft.Reporting.WebForms" TagPrefix="rsweb" %>
<%@ Register Assembly="CrystalDecisions.Web, Version=10.2.3600.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"
    Namespace="CrystalDecisions.Web" TagPrefix="CR" %>

<%@ Register Assembly="TraceMenu" Namespace="TraceMenu" TagPrefix="cc1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>PopupTraceMenuExample</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="GridView1" runat="server" BackColor="White" BorderColor="#3366CC" BorderStyle="None" BorderWidth="1px" CellPadding="4">
            <FooterStyle BackColor="#99CCCC" ForeColor="#003399" />
            <RowStyle BackColor="White" ForeColor="#003399" />
            <SelectedRowStyle BackColor="#009999" Font-Bold="True" ForeColor="#CCFF99" />
            <PagerStyle BackColor="#99CCCC" ForeColor="#003399" HorizontalAlign="Left" />
            <HeaderStyle BackColor="#003399" Font-Bold="True" ForeColor="#CCCCFF" />
        </asp:GridView>   <br />
        <cc1:PopupTraceMenu ID="PopupTraceMenu1" runat="server" TargetControl="GridView1">
        </cc1:PopupTraceMenu>
    </div>
    </form>


</body>
</html>

效果截图:

完整代码下载:创建自定义菜单

posted on 2007-05-20 22:43 Travelling 阅读(667) 评论(1) 编辑收藏举报

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