Required javascript for textbox in asp.net

Posted Date: 12 Jul 2012 Posted By:: none Member Level: Bronze Member Rank: 1989 Points: 1 Responses: 7

hello friends i required javascript only for numeric value

any budy have the script than send me

Responses

#680042 Author: jogesh Member Level: Gold Member Rank: 229 Date: 12/Jul/2012 Rating: Points: 4
Can you please clarify your question. Do you mean that your textbox should accept only numeric values. If yes then use a Regular expression validator instead of javascript. <asp:RegularExpressionValidator ID="regularExpressionValidator" runat="server" ControlToValidate="TextBox1" ValidationExpression="[0-9]+" ErrorMessage="Please enter a numeric value"></asp:RegularExpressionValidator> This validator will show error "Please enter a numeric value", if you enter any thing other than number in the textbox.

#680044 Author:

Paritosh Mohapatra Member Level: Diamond Member Rank: 6 Date: 12/Jul/2012 Rating: 2 out of 5

Points: 4

Please check the following code:


<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Untitled Page</title>

    <script type="text/javascript">
        function isNumberKey(evt) {
            var charCode = (evt.which) ? evt.which : event.keyCode
            if ((charCode > 31 && (charCode < 48 || charCode > 57))) {
                alert('ERROR: You Can Enter Numbers Only');
                return false;
            }
            return true;
        }
    </script>

</head>
<body>
    <form id="form1">
    <input id="Text1" type="text" onkeypress="return isNumberKey(event)" />
    </form>
</body>
</html>

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

#680048 Author: none Member Level: Bronze Member Rank: 1989 Date: 12/Jul/2012 Rating: Points: 1
not for textbox click required for button click

#680075 Author:

Ajatshatru Upadhyay Member Level: Gold Member Rank: 19 Date: 12/Jul/2012 Rating: 2 out of 5

Points: 4

Hi,

See below code:


<head runat="server">
    <title></title>
    <script language="javascript" type="text/javascript">
        function check() {
            var isNum = document.getElementById("TextBox1").value;
            if (isNaN(isNum)) {
                alert("Enter only number");
                return false;
            }
            else {
                return true;
            }
            return false;
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox><br />
        <asp:Button ID="Button1" runat="server" Text="Check for Number" 
            OnClientClick="return check()" onclick="Button1_Click" />
    </div>
    </form>
</body>
</html>

Hope it'll help you.
Regards
Ajatshatru

#680090 Author:

Ravindran

Member Level: Diamond Member Rank: 3 Date: 12/Jul/2012 Rating: 2 out of 5

Points: 4

Refer below code sample


<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Javascript validations using Regular Expression</title>
<script language="JavaScript" type="text/javascript">
//Allow only numeric charecters 0-9 and  backspace delete

function NumberKey(evt) {
    var charCode = (evt.which) ? evt.which : event.keyCode
    var allowchar = /^([0-9])$/;
    if (allowchar.test(String.fromCharCode(charCode)) == true) {
        return true;
    }
    else {
        return false;
    }
}
</script> 
</head>
<body>
    <form id="form1" runat="server">
    <div>
                    NumberKey Validation              
                    <asp:TextBox ID="TextBox5" runat="server" onkeyPress="return NumberKey(event);"></asp:TextBox>                    
    </div>
    </form>
</body>
</html>

Further more detail refer my resource
http://www.dotnetspider.com/resources/43590-How-validate-user-input-using-JavaScript.aspx

Regards
N.Ravindran
Your Hard work never fails

#680115 Author:

Anil Kumar Pandey Member Level: Platinum Member Rank: 1 Date: 12/Jul/2012 Rating: 2 out of 5

Points: 4

Please find the sample Java script code for Numeric validation.


<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

#680125 Author: chandramohan Member Level: Gold Member Rank: 221 Date: 12/Jul/2012 Rating: Points: 2
function numericFilter(txb) { txb.value = txb.value.replace(/[^\0-9]/ig, ""); } <input type="text" onKeyUp="numericFilter(this);" />

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