In this blog we will know, allow only characters in textbox
in asp.net.
Method-1
<%@ Page Language="C#"
AutoEventWireup="true" CodeBehind="Default.aspx.cs"
Inherits="Enter_only_characters_in_textbox._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
<script
type="text/javascript" language="javascript">
function
character(e)
{
isIE =
document.all ? 1 : 0
keyEntry = !isIE ?
e.which : event.keyCode;
if (((keyEntry
>= '65') && (keyEntry <= '90')) || ((keyEntry >= '97')
&& (keyEntry <= '122')) || (keyEntry == '46') || (keyEntry == '32')
|| keyEntry == '45')
return true;
else
{
return false;
}
}
</script>
</head>
<body>
<form
id="form1" runat="server">
<div>
<asp:TextBox
ID="txtName1" runat="server" onkeypress="return
character(event)" ></asp:TextBox>
</div>
</form>
</body>
</html>
Method-2
<%@ Page Language="C#"
AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs"
Inherits="Enter_only_characters_in_textbox.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
<script
type="text/javascript" language="javascript">
function
character(evt)
{
evt = (evt) ? evt
: event;
var charCode =
(evt.charCode) ? evt.charCode : ((evt.keyCode) ? evt.keyCode :
((evt.which) ?
evt.which : 0));
if (charCode >
31 && (charCode < 65 || charCode > 90) &&
(charCode < 97
|| charCode > 122)) {
alert("Enter
only characters");
return false;
}
return true;
}
</script>
</head>
<body>
<form
id="form1" runat="server">
<div>
<input
type="text" onkeypress="return character(event)" />
</div>
</form>
</body>
</html>