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Friday, 29 November 2013

Introduction: In this article you will learn how to convert time to 24 hour time format using JQuery as shown in demo below:



Implementation:  In the default page (.aspx) write the following code having jQuery function “ConvertTimeFormat” that converts the time format.

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

<!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></title>
    <script type="text/javascript">
        function ConvertTimeFormat() {          
            var time = document.getElementById('txtTime').value;
            var hrs = Number(time.match(/^(\d+)/)[1]);
            var mnts = Number(time.match(/:(\d+)/)[1]);
            var format = time.match(/\s(.*)$/)[1];
            if (format == "PM" && hrs < 12) hrs = hrs + 12;
            if (format == "AM" && hrs == 12) hrs = hrs - 12;
            var hours = hrs.toString();
            var minutes = mnts.toString();
            if (hrs < 10) hours = "0" + hours;
            if (mnts < 10) minutes = "0" + minutes;
            alert("Converted Time: " + hours + ":" + minutes);              
        }
</script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <center>
    <table>
<tr>
<td><b>Enter Time:</b></td>
<td>
    <asp:TextBox ID="txtTime" runat="server" Text="10:00 PM"></asp:TextBox></td>
</tr>
<tr>
<td></td>
<td>
    <asp:Button ID="btnSubmit" runat="server" Text="Convert to AM/PM" OnClientClick="ConvertTimeFormat()" />

</td>
</tr>
</table>
</center>
    </div>
    </form>
</body>
</html>


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