在asp.net中比较三个文本框

Question

我遇到问题。我必须将一个文本框与另外两个文本框进行比较，如果值匹配，则应显示错误消息。

我已经尝试过两个比较验证器，但一次只能比较一次验证器，所以得到第一个值只能看到我的代码。

<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>   

我用了从代码的文件，但问题编码它

是它刷新页面，所以如果有任何帮助，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

您可以使用一个CustomValidator。您可以在ClientValidationFunction内编写自己的逻辑。

<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>