简单教程
提交运行
代码编辑器：
<script runat="server"> sub submit(sender As Object, e As EventArgs) if Page.IsValid then lbl.Text="The page is valid!" else lbl.Text="The page is not valid!" end if end sub </script> <!DOCTYPE html> <meta charset="utf-8" /> <form runat="server"> Enter a US zip code: <asp:TextBox id="txtbox1" runat="server" /> <br><br> <asp:Button text="Submit" OnClick="submit" runat="server" /> <br><br> <asp:Label id="lbl" runat="server" /> <br> <asp:RegularExpressionValidator ControlToValidate="txtbox1" ValidationExpression="\d{5}" EnableClientScript="false" ErrorMessage="The zip code must be 5 numeric digits!" runat="server" /> </form>
运行结果：