how to validate the textbox that should accept only Numeric values?

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hi,

Can anyone know?

how to validate the textbox that should accept only Numeric values?

Posted 19-Feb-12 19:15pm

sathiyak

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Sarvesh Kumar Gupta · Answer 1 · 2012-02-19T19:21:00

Hi, call JS function on textbox. use below code for this:

ASP.NET

<asp:textbox id="txtBox" runat="server" width="150px" onkeypress="javascript:return isNumericWithDecimal(event);" xmlns:asp="#unknown"> </asp:textbox>

JS Function

JavaScript

function isNumericWithDecimal(e) 
{
    if ((e.which < 48 || e.which > 57)) 
    {
        if (e.which == 8 || e.which == 46 || e.which == 0) 
        {
            return true;
        }
        else 
        {
            return false;
        }
    }
}

Om Prakash Pant · Answer 2 · 2012-02-19T19:23:00

JavaScript

Validate using javascript like,

function allownumbers(e)
   {
    var key = window.event ? e.keyCode : e.which;
    var keychar = String.fromCharCode(key);
    var reg = new RegExp("[0-9.]")
    if (key == 8)
    {
     keychar = String.fromCharCode(key);
    }
    if (key == 13)
    {
     key=8;
     keychar = String.fromCharCode(key);     
    }
    return reg.test(keychar);
   } 

Call this method in ONKEYPRESS event of the textbox like,
txtBox.Attributes.Add("onkeypress","javascript:return allownumbers(event);");

More options:

http://forums.asp.net/t/1156966.aspx/1[^]

sathiyak · Answer 3 · 2012-02-19T19:30:00

VB

<asp:RegularExpressionValidator id="RegularExpressionValidator1"
                   ControlToValidate="TextBox1"
                   ValidationExpression="\d+"
                   Display="Static"
                   EnableClientScript="true"
                   ErrorMessage="Please enter numbers only"
                   runat="server"/>

how to validate the textbox that should accept only Numeric values?

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