如何使用javascript检查asp.net中两个数字和两个十进制值的文本框验证?
例如,按文本框中的键,它应该只允许我xx.xx格式,例如:12.25,25.50,48.45等。
答案 0 :(得分:0)
我得到了答案。
<div>
<asp:TextBox ID="TextBox2" runat="server"
onkeypress="return isDecimalNumber(event,this);" MaxLength="5">
</asp:TextBox>
</div>
<script type="text/javascript" language="javascript">
var count = 0;
function isDecimalNumber(evt, c) {
count = count + 1;
var charCode = (evt.which) ? evt.which : event.keyCode;
var dot1 = c.value.indexOf('.');
var dot2 = c.value.lastIndexOf('.');
if (count > 2 && dot1 == -1) {
c.value = "";
count = 0;
}
if (dot1 > 2) {
c.value = "";
}
if (charCode != 46 && charCode > 31 && (charCode < 48 || charCode > 57))
return false;
else if (charCode == 46 && (dot1 == dot2) && dot1 != -1 && dot2 != -1)
return false;
return true;
}
</script>
答案 1 :(得分:0)
试试这个,
$('.TextBox2').keypress(function (event) {
if ((event.which != 46 || $(this).val().indexOf('.') != -1) && (event.which < 48 || event.which > 57)) {
event.preventDefault();
}
var text = $(this).val();
if ((text.indexOf('.') != -1) && (text.substring(text.indexOf('.')).length > 2)) {
event.preventDefault();
}
});
答案 2 :(得分:-1)
http://jsfiddle.net/hibbard_eu/vY39r/
$("#amount").on("keyup", function(){
var valid = /^\d{0,2}(\.\d{0,2})?$/.test(this.value),
val = this.value;
if(!valid){
console.log("Invalid input!");
this.value = val.substring(0, val.length - 1);
}
});