How to Allow Only Numeric Values in Asp.net

Java Script function only Integers values in Textbox

In Asp.net Programming some time we need only enter Numeric value in text-boxes like EmpolyeeId, Telephone Number, Mobile Number and so on.

We can use JavaScript for this kind of problem. To allow only numerical values in Asp.net Textboxes.

JavaScript Function:

<script type="text/javascript" language="javascript">

function isNumberKey()

{

if(!(((event.keyCode>=48&&event.keyCode<=57) || (event.keyCode>=96&&event.keyCode<=105))||(event.keyCode==8) || (event.keyCode==9) || (event.keyCode==37) || (event.keyCode==39) || (event.keyCode==46) || (event.keyCode==190)))

event.returnValue=false;

}

<script>

Asp.net:

Calling the above function from Asp.net Textbox control:

<label> Empolyee Id</label>

<asp:TextBox ID="txtEmpID" runat="server"  onkeydown="isNumberKey();">

<asp:TextBox>

HTML:

<label> Empolyee Id</label>

<input ID="txtEmpID"  onkeydown="isNumberKey();" />

How to Allow Only Numeric Values in Asp.net Using Javascript

Posted in: Asp.Net, Java Scripts