源代码
<script runat="server"> Sub submit(sender As Object, e As EventArgs) If Page.IsValid Then lbl1.Text="页面有效。" Else lbl1.Text="页面无效！" End If End Sub </script> <html> <body> <form runat="server"> 请输入 1 到 100 之间的数字： <asp:TextBox id="tbox1" runat="server" /> <br /><br /> <asp:Button Text="提交" OnClick="submit" runat="server" /> <br /><br /> <asp:Label id="lbl1" runat="server" /> <br /> <asp:RangeValidator ControlToValidate="tbox1" MinimumValue="1" MaximumValue="100" Type="Integer" EnableClientScript="false" Text="该值必须在 1 到 100 之间。" runat="server" /> </form> </body> </html>
运行结果
