Utc Validaton using regular expression

Apr 2 2018 5:34 AM

Hello guys,

I have come up with a scenario where I want to validate a textbox with UTC format:

e.g: +05:30 -01:05 (this can be any time format)

I need to validate my textbox strictly, the user must be forced to enter 2 digits after + or minus sign and 2 digits after the colon.

Validation:

1) 1st character must be + or - only

2)next accept only 2 digits then append colon then 2 digits after colon.

Can anybody tell me how do i validate this utc format:

so far i have done this:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="home.aspx.cs" Inherits="reg.home" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="scripts/jquery-3.3.1.js"></script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" runat="server"
onkeyup="sayKeyCode(event,this.value);">
</asp:TextBox>
</div>
<asp:RegularExpressionValidator ID="rgx" ControlToValidate="TextBox1" runat="server"
ErrorMessage="only 2 digit is allowed before and after colon" ForeColor="Red"
Display="Dynamic"
ValidationExpression="^[0-9]{0,9}(\:[0-9]{2,2})?$"></asp:RegularExpressionValidator>
</form>
<script type="text/javascript" language="javascript">
function sayKeyCode(event, v)
{
var TextBox = document.getElementById('<%=TextBox1.ClientID%>');
//alert(event.keyCode);
if(event.keyCode != 8)
{
if (TextBox.value.length == 2 && TextBox.value.length != 3)
{
TextBox.value = TextBox.value + ":";
}
else
{
TextBox.value = TextBox.value;
}
}
}
</script>
</body>
</html>

Answers (1)