text box validation in asp.net

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hi

I would like to validate this text box in integer. What can I do?

ASP.NET

<asp:TextBox ID="txt_postal_code" Width="85%" CssClass="tb_dbi" runat="server">

Thanks in advance.

Posted 18-Nov-11 1:33am

afsal.mp

Updated 18-Nov-11 1:58am

André Kraak

v3

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uspatel · Answer 1 · 2011-11-18T01:58:00

Solution 4

Use Compare Validator

C#

<asp:textbox id="textbox11" runat="server" xmlns:asp="#unknown">
<asp:comparevalidator id="intValidator" runat="server" controltovalidate="textbox1" operator="DataTypeCheck" type="int" errormessage="Value must be int" xmlns:asp="#unknown" />

Posted 18-Nov-11 1:58am

uspatel

Updated 18-Nov-11 1:59am

v2

Pandya Anil · Answer 2 · 2011-11-18T01:43:00

You have 2 choices, Use ASP.NET Validation Control, or use Javascript. both are displayed below.

1) ASP.NET validator controls:

Validator Controls in ASP.NET[^]

http://onetidbit.wordpress.com/2008/01/25/14/[^]

2) Javascript:

http://www.c-sharpcorner.com/UploadFile/purankaushal/103222006013805AM/1.aspx[^]

http://stackoverflow.com/questions/18082/validate-numbers-in-javascript-isnumeric[^]

Cheers :)

srinivas vadepally · Answer 3 · 2011-11-18T01:49:00

Solution 3

Hi afsal,
Numeric Textbox

Posted 18-Nov-11 1:49am

srinivas vadepally

Prince Antony G · Answer 4 · 2011-11-18T18:07:00

C#

<script language="javascript" type="text/javascript">
function isNumberKey(evt)
     {
        var charCode = (evt.which) ? evt.which : event.keyCode
        if (charCode > 31 && (charCode < 48 || charCode > 57))
        {
        if (charCode != 46)
        {
        alert("only Numbers are allowed");
           return false;

           }
        }
        return true;
     }
  </script>

C#

txt_postal_code.Attributes["onkeypress"] = "javascript:return isNumberKey(event);";

Or use Compare Validator

C#

<asp:TextBox ID="txt_postal_code" runat="server">
   <asp:CompareValidator ID="intValidator" runat="server" ControlToValidate="txt_postal_code" Operator="DataTypeCheck" Type="Integer" ErrorMessage="Value must be int">

resonance_siv · Answer 5 · 2011-11-18T01:38:00

HTML

<HTML>
   <HEAD>
   <SCRIPT language=Javascript>
   
      function isNumberKey(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode
         if (charCode > 31 && (charCode < 48 || charCode > 57))
            return false;

         return true;
      }
     
   </SCRIPT>
   </HEAD>
   <BODY>
      <INPUT id="txtChar"  önkeypress="return isNumberKey(event)" type="text" name="txtChar">
   </BODY>
</HTML>

i think this will be helpful

text box validation in asp.net

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