 |
But we can handle the double click event of the list box through java script.
Ex:-
<asp:ListBox ID="lstBox" runat="server" Width="16%" CssClass="inputtext" SelectionMode="Multiple" ondblclick="ListBox1_DoubleClick()">
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>2</asp:ListItem>
<asp:ListItem>3</asp:ListItem>
<asp:ListItem>4</asp:ListItem>
<asp:ListItem></asp:ListItem>
</asp:ListBox>
here we can find ondblclick="ListBox1_DoubleClick()”, where “ListBox1_DoubleClick()" javascript function is called when user double clicks on any item in the list box.
In below example, I am using a hidden type which helps to work as a flag that says list box item is double clicked.
So when user double clicks on any one of the item, I will assign a flag to the hidden type as “doubleclicked" and postback or submit page.
While reading the value from this hidden parameter, if I find the value saying as “doubleclicked", then I can confirm that it is double click event of the list box and perform required action.
Aspx page:-
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!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>List box</title>
<script language="javascript">
function ListBox1_DoubleClick() {
document.forms[0].ListBox1Hidden.value = "doubleclicked";
document.forms[0].submit();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ListBox ID="lstBox" runat="server" Width="16%" CssClass="inputtext" SelectionMode="Multiple" ondblclick="ListBox1_DoubleClick()">
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>2</asp:ListItem>
<asp:ListItem>3</asp:ListItem>
<asp:ListItem>4</asp:ListItem>
<asp:ListItem></asp:ListItem>
</asp:ListBox>
<input type="hidden" name="ListBox1Hidden" />
</div>
</form>
</body>
</html>
Code behind page:-
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Default2 : System.Web.UI.Page
{
protected 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 "
+ lstBox.SelectedItem.Text);
}
}
}
output:-
When user double clicks on any item, I am writing the selected item’s text.
 |
No comments:
Post a Comment