Here is the code in html to allow only one decimal point in a textbox:(这是html中的代码，该文本在文本框中仅允许一个小数点：)
<html>
<head>
<script type="text/javascript" language="javascript">
function isNumberKey(evt) {
var charCode = (evt.charCode) ? evt.which : event.keyCode
if (charCode > 31 && (charCode < 48 || charCode > 57) && charCode != 46)
return false;
else {
var input = document.getElementById("txtChar").value;
var len = document.getElementById("txtChar").value.length;
var index = document.getElementById("txtChar").value.indexOf('.');
if (index > 0 && charCode == 46) {
return false;
}
if (index >0 || index==0) {
var CharAfterdot = (len + 1) - index;
if (CharAfterdot > 2) {
return false;
}
}
if (charCode == 46 && input.split('.').length >1) {
return false;
}
}
return true;
}
</script>
</head>
<body>
<input type="text" id="txtChar" onkeypress="return isNumberKey(event)" name="txtChar" class="CsstxtChar" maxlength="4"/>
</body>
</html>
I want to done this in asp.net using c#.This code is not properly working in asp.net.(我想使用c＃在asp.net中完成此操作。此代码无法在asp.net中正常工作。)
ask by Monica translate from so
