textbox only allow numbers

Try This :-

In html part of the section put the following javascript code :-

<script language="Javascript" type="text/javascript">
var isShift=false;
function isNumeric(keyCode)

{
if(keyCode==16)

isShift = true;
return (((keyCode >= 48 && keyCode <= 57) || keyCode == 8 || keyCode == 189 || keyCode == 9 || (keyCode >= 96 && keyCode <= 105)) && isShift==false)

}
function isAlpha(keyCode)

{
if(keyCode==16)

isShift = true;
return (((keyCode >= 65 && keyCode <= 90) || keyCode == 8 || keyCode == 32 || keyCode == 190) && isShift==false)

}
function keyUP(keyCode)

{
if(keyCode==16)

isShift = false;

//alert(isShift);

}

</script>


and in the textbox section write down the following code

<asp:TextBox ID="txtrollno" runat="server" onkeyup = "keyUP(event.keyCode)" onkeydown = "return isNumeric(event.keyCode);" onpaste = "return false;" ></asp:TextBox>

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function isNumber(inputStr) {
for (var i = 0; i < inputStr.length; i++) {
var oneChar = inputStr.substring(i, i + 1)
if (oneChar < "0" || oneChar > "9") {
alert("Please enter only numeric value");
return false;
}
}
return true;
}

Thanks,
Rajni Shekhar

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Try wit this....

function EnterOnlyNumbers(x)

   {

    var len=x.value.length;

    var s_charcode=0;

    for(var s_i=0;s_i<len;s_i++)

    {

     s_charcode=x.value.charCodeAt(s_i);

     if(!((s_charcode>=48 && s_charcode<=57)))

     {

       alert("Enter only numbers");

       x.value="";

       x.focus();

       return false;

     }

    }

    return true;

   }

<asp:textbox id="txt1" ruat="server" onChange="EnterOnlyNumbers(this)">

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Klbaiju, if this helps please login to Mark As Answer. | Alert Moderator

Hi

By using Jquery we can simply validate ..check this link

http://www.developerscode.com/2011/09/allow-only-numerics-using-jquery-in.html

let me know..if you have any doubts

If you found answer,pls mark as answer

Tanisha Sayyad
.Net and Android Developer
INDIA(Andhra Pradesh)

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Hi,

Write down following javascript

function isNumeric(your-text){

  var regX = "^[0-9]*$";

  return regX.test(your-test);

}

Himanshu Manjarawala
Sr. Software Engineer@AutomationAnywhere
http://fieredotnet.wordpress.com/

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<asp:TextBox ID="txtorderid" runat="server" TabIndex="1"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="txtorderid" ErrorMessage="only number are allowed" ValidationExpression="^\d+$" ValidationGroup="a"></asp:RegularExpressionValidator>

ER sandeep chourasia
sandeepchrs@yahoo.com (on facebook)
http://www.aspnetcodes.com/

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