ASP.NET中ListBox实现Double Click事件

王朝学院·作者佚名  2009-11-11
窄屏简体版  字體: |||超大  

(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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