ASP.NET中ListBox实现Double Click事件

2019-11-17 04:05:20

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(1)在WEB页面上加入JS脚本和存放ListBox事件的隐藏输入框,LISTBOX是用来保存时间的名称,在CS页面用到:其JS代码如下:

<script language="javascript">
     function ListBox1_DoubleClick() {
       /* we will change value of this hidden field so  that inpage load event we can identify event.
       */
        document.forms[0].ListBox1Hidden.value = "doubleclicked";
        document.forms[0].submit();
     }
</script>

(2)将 asp.net控件LISTBOX中加入双击事件声明如下:

<asp:ListBox id="ListBox1"
                     ondblclick="ListBox1_DoubleClick()" runat="server">
                 <asp:ListItem Value="1">One</asp:ListItem>
                 <asp:ListItem Value="2">Two</asp:ListItem>
                 <asp:ListItem Value="3">Three</asp:ListItem>
                 <asp:ListItem Value="4">Four</asp:ListItem>
             </asp:ListBox>
(3)在WEB窗体加载的时候执行如下代码(即双击LISTBOX中ITEM后执行的内容),

if(Request.Params["ListBox1Hidden"] != null
     && (string)Request.Params["ListBox1Hidden"] == "doubleclicked" )

{
    //the Listwas double click Event
    }
    }

例子如下:

<html>
<head>
     <script language="Javascript">
     function ListBox1_DoubleClick() {
       /* we will change value of this hidden field so

    that in
    page load event we can identify event.
            */
        document.forms[0].ListBox1Hidden.value = "doubleclicked";
        document.forms[0].submit();
     }
</script>
</head>
<body>
     <form runat="server">
         <div>Double click on Listbox
             <br />
             <asp:ListBox id="ListBox1"
                     ondblclick="ListBox1_DoubleClick()" runat="server">
                 <asp:ListItem Value="1">One</asp:ListItem>
                 <asp:ListItem Value="2">Two</asp:ListItem>
                 <asp:ListItem Value="3">Three</asp:ListItem>
                 <asp:ListItem Value="4">Four</asp:ListItem>
             </asp:ListBox>
             <input type="hidden" name="ListBox1Hidden" />
         </div>
         <div>click on button
             <br />
             <asp:Button id="Button1" onclick="Button1_Click"
                 runat="server" Text="Button"/>
         </div>
     </form>
</body>
</html>WEB窗体加载时候执行下列代码就能实现双击ListBox中Item执行一些操作void Page_Load(Object sender, EventArgs e){
   if(Request.Params["ListBox1Hidden"] != null
     && (string)Request.Params["ListBox1Hidden"] == "doubleclicked") {
    //This means It was double click
     Response.Write("Double Click was fired selected item is "
     + ListBox1.SelectedItem.Text);

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