Hi in this post i will show how to allow only numeric values to be entered into the text-box.
1. On every keypress event in the textbox i will call this below function, this function will just allow you to enter numeric values and rest of the characters other than number will get blocked.
function isNumber(event) {
var KeyBoardCode = (event.which) ? event.which : event.keyCode;
if (KeyBoardCode > 31 && (KeyBoardCode < 48 || KeyBoardCode > 57)) {
return false;
}
return true;
}
Example :
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script language="javascript" type="text/javascript" >
function isNumber(event) {
var KeyBoardCode = (event.which) ? event.which : event.keyCode;
if (KeyBoardCode > 31 && (KeyBoardCode < 48 || KeyBoardCode > 57)) {
return false;
}
return true;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" onkeypress="return isNumber(event)" runat="server"></asp:TextBox>
</div>
</form>
</body>
</html>
1. On every keypress event in the textbox i will call this below function, this function will just allow you to enter numeric values and rest of the characters other than number will get blocked.
function isNumber(event) {
var KeyBoardCode = (event.which) ? event.which : event.keyCode;
if (KeyBoardCode > 31 && (KeyBoardCode < 48 || KeyBoardCode > 57)) {
return false;
}
return true;
}
Example :
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script language="javascript" type="text/javascript" >
function isNumber(event) {
var KeyBoardCode = (event.which) ? event.which : event.keyCode;
if (KeyBoardCode > 31 && (KeyBoardCode < 48 || KeyBoardCode > 57)) {
return false;
}
return true;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="TextBox1" onkeypress="return isNumber(event)" runat="server"></asp:TextBox>
</div>
</form>
</body>
</html>
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