Only one decimal point in text box validation in javascript

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Hi
Only one decimal point in text box validation in java script.Most java script Validation support multiple dot's.please send me

Posted 12-Oct-12 19:18pm

Loganathan.M

Updated 8-Mar-17 1:46am

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Sumit_Kumar_Sinha · Answer 1 · 2012-10-12T19:56:00

Solution 1

Try this one :- http://www.sitepoint.com/forums/showthread.php?797117-1-Decimal-Validation[^]

Posted 12-Oct-12 19:56pm

Sumit_Kumar_Sinha

_Amy · Answer 2 · 2012-10-12T19:59:00

Solution 2

Try this:
Javascript:

JavaScript

function checkDec(el){
     var ex = /^[0-9]+\.?[0-9]*$/;
     if(ex.test(el.value)==false){
         alert('Incorrect Number');
     }
}

HTML:

ASP.NET

<asp:textbox id="text1" runat="server" onblur="checkDec(this);" />

--Amit

Posted 12-Oct-12 19:59pm

_Amy

Updated 12-Oct-12 20:00pm

v2

Member 13045990 · Answer 3 · 2017-03-08T01:46:00

Put this code in textbox_keypress
here txtweight is my textbox name you use yours

private void txtweight_KeyPress(object sender, KeyPressEventArgs e)
{

if (txtweight.Text.Length == 0)
{
if (e.KeyChar == '.')
{
e.Handled = true;
}
}
if (!char.IsDigit(e.KeyChar) && e.KeyChar != 8 && e.KeyChar != 46)
{
e.Handled = true;
}
if (e.KeyChar == '.' && txtweight.Text.IndexOf('.') > -1)
{
e.Handled = true;
}

}