type only numbers and dot in textbox

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Hi I only need to type numbers and one dot(.) in my textbox. how can i validate it. i am using asp.net with vb.

thanks
afsal

Posted 20-Mar-12 23:44pm

afsal.mp

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4 solutions

Solution 3

try this

in textbox textchanged validate this function

C#

public static bool IsDesimal(string strValue)
        {
            string decimalNumber = ".0123456789";
            for (int i = 0; i < strValue.Trim().Length; i++)
            {
                if (decimalNumber.IndexOf(strValue[i]) == -1)
                {
                    return false;
                }
            }

            return true;
        }

Posted 21-Mar-12 0:05am

Bojjaiah

Updated 21-Mar-12 0:06am

v2

Solution 4

hi,
try the following,

XML

<HTML>
   <HEAD>
   <SCRIPT language=Javascript>
      <!--
      function isNumberKey(evt)
      {
         var charCode = (evt.which) ? evt.which : event.keyCode
 
         if (charCode = 46 || (charCode >= 48 && charCode <= 57))
            return false;

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

Posted 21-Mar-12 0:28am

Hrushikesh_phapale

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Prasad_Kulkarni · Accepted Answer · 2012-03-20T23:47:00

Solution 1

Try this:

C#

void NumberValidation(object sender, KeyPressEventArgs e)
        {
            if ((e.KeyChar >= 48 && e.KeyChar <= 57) || e.KeyChar == 46)
            {
                e.Handled = false;
            }
            else
            {
                e.Handled = true;
            }
        }

Posted 20-Mar-12 23:47pm

Prasad_Kulkarni

Comments

afsal.mp 21-Mar-12 6:02am

where to fix this code?

afsal.mp 21-Mar-12 6:17am

thank you pashad

Prasad_Kulkarni 21-Mar-12 8:03am

Glad it helps

RashdSiddique · Accepted Answer · 2012-03-20T23:47:00

Solution 2

You can use Filter textbox extender of ajax control toolkit,or you can use javascript allow user type only what you want.

Posted 20-Mar-12 23:47pm

RashdSiddique

Comments

afsal.mp 21-Mar-12 6:16am

done it

function ValDigit(val) {

var keyCodeEntered = (event.which) ? event.which : (window.event.keyCode) ? window.event.keyCode : -1;

if ((keyCodeEntered >= 48) && (keyCodeEntered <= 57)) {

return true;

}

else if (keyCodeEntered == 46) {

if ((val.value) && (val.value.indexOf('.') >= 0))

return false;

else

return true;

}

return false;

}

<asp:TextBox ID="TextBox1" onkeypress="return ValDigit(this);" runat="server">

Sarathkumar Nallathamby 19-Dec-12 7:52am

I got the code using Ajax for numbers and dots.. But my Case is for only one dot have to enter and two decimals only allowed....!!!