如何限制用户在Web应用程序中没有验证器的情况下在文本框中输入字母?
问题描述:
我正在使用用户在其中输入金额的文本框.但是我要用户限制在Web应用程序中输入字母吗?
请帮助
问候
manohar
i am using textbox where user enter amount..But i want to the user to restrict from entering alphabets in web application?
plz help
regards
manohar
答
尝试一下,
js函数:
Try this,
js function :
function isNumberKey(evt, ctrlName) {
var str = ctrlName.value;
var charCode = (evt.which) ? evt.which : event.keyCode
if (charCode > 31 && (charCode < 48 && charCode != 46) || charCode > 57) {
return false;
}
else if (charCode == 46 && (str.indexOf(".") != -1)) {
return false;
}
else {
return true;
}
}
致电方式:
Calling way:
<asp:TextBox ID="txt_rate" runat="server" Width="103px" onkeypress="return isNumberKey(event,this)" ></asp:TextBox>
选项1:使用MaskedEdit之类的AJAX控件:
http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/MaskedEdit/MaskedEdit.aspx [ ^ ]
选项2:使用Javascript
,并先读取每个输入,然后再将其显示在控件上.
Option 1: Use AJAX controls like Masked
http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/MaskedEdit/MaskedEdit.aspx[^]
Option 2: UseJavascript
, and read every Input before allowing it to appear on the control.