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Javascript to enter only digits with "-"(eg:040-4444444)

Posted Date: 17 Jul 2012 Posted By:: Naseer Member Level: Bronze Member Rank: 2055 Points: 5 Responses: 5

i my page i want to enter the landline no,but i want to enter the district code so i want to enter in this format(eg:040-4444444),its taking only digits but i want to enter "-" also

<script type="text/javascript">
function AllowNumsOnly(evt)
{
var charCode = (evt.which) ? evt.which : event.keyCode
if (charCode > 31 && (charCode < 48 || charCode > 57))
return false;
else
return true;
}
</script>

<asp:TextBox ID="txt_Qty" runat="server" onkeypress="return AllowNumsOnly(event);"></asp:TextBox>

thanks in advance,
Naseer.

Responses

#680725 Author: jogesh Member Level: Gold Member Rank: 229 Date: 17/Jul/2012 Rating: Points: 2
try this... here i have used regular expression, instead of ASCII keys <script type="text/javascript"> function checkPhone(str) { var phone2 = ^[\d-]+$; if (str.match(phone2)) { return true; } else { return false; } } </script> Hope this may help you...

#680726 Author:

Paritosh Mohapatra Member Level: Diamond Member Rank: 6 Date: 17/Jul/2012 Rating: 2 out of 5

Points: 4

Please check the following code:


<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script type="text/javascript">
        function AllowNumsOnly(evt) {
            var txt = document.getElementById('txt_Qty');
            if (txt.value.length == 3) {
                txt.value = txt.value + '-';
            }
            var charCode = (evt.which) ? evt.which : event.keyCode
            if (charCode > 31 && (charCode < 48 || charCode > 57))
                return false;
            else
                return true;
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="txt_Qty" runat="server" onkeypress="return AllowNumsOnly(event);"></asp:TextBox>
    </div>
    </form>
</body>
</html>

Thanks & Regards
Paritosh Mohapatra
Microsoft MVP (ASP.Net/IIS)
DotNetSpider MVM

#680731 Author:

Ravindran

Member Level: Diamond Member Rank: 3 Date: 17/Jul/2012 Rating: 2 out of 5

Points: 4

Try like this code


<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Javascript validations</title>
<script language="JavaScript" type="text/javascript">
function NumberKey(evt) {
    var charCode = (evt.which) ? evt.which : event.keyCode
    if (charCode > 47 && charCode < 58 || charCode == 127 || charCode == 8 || charCode == 45) {
        return true;
    }
    else {
        return false;
    }
}
</script> 
</head>
<body>
    <form id="form1" runat="server">
    <div>
             Enter number<asp:TextBox ID="TextBox5" runat="server" onkeyPress="return NumberKey(event);"></asp:TextBox>                     
    </div>
    </form>
</body>
</html>

Regards
N.Ravindran
Your Hard work never fails

#680742 Author: Ajatshatru Upadhyay Member Level: Gold Member Rank: 19 Date: 17/Jul/2012 Rating: Points: 4
Hi, You can do that by extending your code. But then the problem is user will be free to add any number of "hyphens (-)". Though you can restrict user to enter only one "hyphen (-)", but then the problem is: Suppose user enters a "hyphen (-)", then he/she found some mistake and used "backspace" key to delete what is already entered, then he/she cannot be able to enter "hyphen (-)" again, because you cannot trap the "backspace" key on "onkeypress" event. So a work around of this if you want to add a hyphen between code and the number is, you can add it when you process the data. But in this case also you have to keep track of the city, so that you know the length of the STD code (as it can be 3, 4, 5). Hope it'll help you. Regards Ajatshatru

#680789 Author:

Anil Kumar Pandey Member Level: Platinum Member Rank: 1 Date: 17/Jul/2012 Rating: 2 out of 5

Points: 4

Try using the below sample Query to validate the input as


<SCRIPT language="JavaScript">
  <!--

function IsNumeric(strString)
   //  check for valid numeric strings	
   {
   var strValidChars = "0123456789.-";
   var strChar;
   var blnResult = true;

   if (strString.length == 0) return false;

   //  test strString consists of valid characters listed above
   for (i = 0; i < strString.length && blnResult == true; i++)
      {
      strChar = strString.charAt(i);
      if (strValidChars.indexOf(strChar) == -1)
         {
         blnResult = false;
         }
      }
   return blnResult;
   }

  // -->
</SCRIPT>

Thanks & Regards
Anil Kumar Pandey
Microsoft MVP, DNS MVM

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