源代码:
<html> <body> <form runat="server"> <table border="0" bgcolor="#b0c4de"> <tr valign="top"> <td colspan="4"><h4>Compare two values</h4></td> </tr> <tr valign="top"> <td><asp:TextBox id="txt1" runat="server" /></td> <td> <asp:ListBox id="list" rows="2" OnSelectedIndexChanged="check_operator" runat="server"> <asp:ListItem value="Equal" selected>=</asp:ListItem> <asp:ListItem value="NotEqual"><></asp:ListItem> </asp:ListBox> </td> <td><asp:TextBox id="txt2" runat="server" /></td> <td><asp:Button Text="Validate" runat="server" /></td> </tr> </table> <asp:CompareValidator id="compval" Display="dynamic" ControlToValidate="txt1" ControlToCompare="txt2" ForeColor="red" BackColor="yellow" Type="String" EnableClientScript="false" Text="Validation Failed!" runat="server" /> </form> </body> </html>
运行结果：
<html> <body> <form runat="server"> <table border="0" bgcolor="#b0c4de"> <tr valign="top"> <td colspan="4"><h4>Compare two values</h4></td> </tr> <tr valign="top"> <td><asp:TextBox id="txt1" runat="server" /></td> <td> <asp:ListBox id="list" rows="2" OnSelectedIndexChanged="check_operator" runat="server"> <asp:ListItem value="Equal" selected>=</asp:ListItem> <asp:ListItem value="NotEqual"><></asp:ListItem> </asp:ListBox> </td> <td><asp:TextBox id="txt2" runat="server" /></td> <td><asp:Button Text="Validate" runat="server" /></td> </tr> </table> <asp:CompareValidator id="compval" Display="dynamic" ControlToValidate="txt1" ControlToCompare="txt2" ForeColor="red" BackColor="yellow" Type="String" EnableClientScript="false" Text="Validation Failed!" runat="server" /> </form> </body> </html>