比较asp.net中的三个文本框

Question

我有问题。我必须将一个文本框与其他两个文本框进行比较，如果值匹配，则它们应该显示一条错误消息。

我尝试了两个比较验证器，但一次只有一个比较验证器有效，所以获取第一个值只能查看我的代码。

<asp:CompareValidator ForeColor="Red" Font-Size="Small" runat="server" 
     ID="CompareValidator2" controltovalidate="txtsponsorfatherhusbandname" 
     controltocompare="txtfatherhusbandname" operator="NotEqual" type="String" 
     errormessage="Sponsor and applicant father name cannot be same" SetFocusOnError="true">
</asp:CompareValidator>
<asp:CompareValidator ForeColor="Red" Font-Size="Small" runat="server" 
     ID="cmpfather" controltovalidate="txtsponsorname" 
     controltocompare="txtfatherhusbandname" operator="NotEqual" type="String" 
     errormessage="Sponsor and applicant father name cannot be same" SetFocusOnError="true">
</asp:CompareValidator>         

我曾使用代码文件对其进行编码，但问题是它必须刷新页面，因此如果有任何帮助，将不胜感激。 see the picture i want to check if applicant name is not equal to either Sponsor name and sponsor father husband name and if they are equal then they show a message and focus is on applicant name

Answer 1

您可以为此使用CustomValidator。您可以在ClientValidationFunction 中编写自己的逻辑。

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
<br />
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
<br />
<asp:Button ID="Button1" runat="server" Text="Button" />
<br />

<asp:CustomValidator ID="CustomValidator1" runat="server" 
    ClientValidationFunction="checkAll3Boxes" ErrorMessage="All three are the same"></asp:CustomValidator>

<script type="text/javascript">
    function checkAll3Boxes(sender, element) {
        var tb1 = document.getElementById('<%= TextBox1.ClientID %>').value;
        var tb2 = document.getElementById('<%= TextBox2.ClientID %>').value;
        var tb3 = document.getElementById('<%= TextBox3.ClientID %>').value;

        if (tb1 != "" && tb1 == tb2 && tb1 == tb3) {
            element.IsValid = false;
        } else {
            element.IsValid = true;
        }
    }
</script>