日期:2012-08-23  浏览次数:20405 次

为了比较两个控件的值,此时我们需要使用CompareValidator 控件。
在下面的这个例子中,我们将讲解CompareValidator 控件的用法。
先看文件validata4.aspx:
<!--源文件:form\web页面简介\validate4.aspx-->
<%@ Page clienttarget=downlevel %>
<html>
<title>CompareValidator控件示例</title>
<head>
    <script language="VB" runat="server">
        Sub Button1_OnSubmit(sender As Object, e As EventArgs)
            If Page.IsValid Then
               lblOutput.Text = "比较正确!"
            Else
               lblOutput.Text = "比较不正确!"
            End If
        End Sub
        Sub lstOperator_SelectedIndexChanged(sender As Object, e As EventArgs)
            comp1.Operator = lstOperator.SelectedIndex
            comp1.Validate
        End Sub
   </script>
</head>
<body>
<center>
    <h3><font face="Verdana">CompareValidator控件示例</font></h3>
    <form runat=server>
      <table bgcolor="#eeeeee" cellpadding=10>
      <tr valign="top">
        <td>
            <h5><font face="Verdana">字符串 1:</font></h5>
            <asp:TextBox Selected id="txtComp" runat="server"></asp:TextBox>
        </td>
        <td>
            <h5><font face="Verdana">比较运算符:</font></h5>
            <asp:ListBox id="lstOperator" OnSelectedIndexChanged="lstOperator_SelectedIndexChanged" runat="server">
                    <asp:ListItem Selected Value="Equal" >=</asp:ListItem>
                    <asp:ListItem Value="NotEqual" ><></asp:ListItem>
                    <asp:ListItem Value="GreaterThan" >></asp:ListItem>
                    <asp:ListItem Value="GreaterThanEqual" >>=</asp:ListItem>
                    <asp:ListItem Value="LessThan" ><</asp:ListItem>
                    <asp:ListItem Value="LessThanEqual" >=<</asp:L