62,046
社区成员
发帖
与我相关
我的任务
分享
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
<script type="text/javascript">
function check()
{
if(!RequiredFieldValidatorEvaluateIsValid(RequiredFieldValidator1))
{
RequiredFieldValidator1.style.visibility = "visible";
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1"
ErrorMessage="non null"></asp:RequiredFieldValidator>
<input type="button" onclick="check()" value="Validate"/>
</form>
</body>
</html>