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demo_reqfieldvalidator 在线工具

demo_reqfieldvalidator 在线工具

输入 运行代码 
<html>
<body>

<form runat="server">
Name: <asp:TextBox id="name" runat="server" />


Age: <asp:TextBox id="age" runat="server" />



<asp:Button runat="server" Text="Submit" />



<asp:RequiredFieldValidator
ControlToValidate="name"
Text="The name field is required!"
runat="server" />
</form>

</body>
</html>
运行结果
PC端 手机端 平板端