Asp.Net自定义验证控件不显示错误消息

Question

以下代码用于验证表单提交按钮何时被命中，但我没有收到想要的结果。

它应该显示错误消息，但它们没有被显示我做错了什么？

自定义验证验证密码，它应根据所发生的错误更改错误信息：

1. 密码为空
2. 密码无效
3. 密码不匹配

一次只能显示一个错误，所以我在.ascx.cs中编写了这个自定义validator：

protected void cvPasswordValidation_ServerValidate(object source, ServerValidateEventArgs args) 
    { 

     bool IsPasswordBlank = false; 
     bool IsPasswordValid = false; 

     cvPasswordValidation.IsValid = false; 

     // If password is blank then IsValid is false, show blank password errors. 
     if (String.IsNullOrEmpty(args.Value)) 
     { 

      //args.IsValid = false; 
      IsPasswordBlank = true; 
      //Show blank password error depending on which box is empty. 
      if (String.IsNullOrEmpty(txtPassword.Text)) 
      { 
       cvPasswordValidation.ErrorMessage = "You must enter password"; 
      } 
      else 
      { 
       cvPasswordValidation.ErrorMessage = "You must confirm password"; 
      } 
      cvPasswordValidation.IsValid = false; 

     } 
     else 
     { 
      cvPasswordValidation.IsValid = true; 
     } 

     // If password is not valid format then IsValid is false, show invalid format errors. 
     if (!Regex.IsMatch(args.Value, RegexHelper.ValidPassword)) 
     { 

      IsPasswordValid = true; 
      //Show invalid format errors, if password is not blank 
      if (IsPasswordBlank == false) 
      { 
       cvPasswordValidation.ErrorMessage = "<b>Current password</b> not in correct format. Your password must contain 6 - 12 characters with a combination of numbers and letters."; 
      } 
      cvPasswordValidation.IsValid = false; 
     } 
     else 
     { 
      cvPasswordValidation.IsValid = true; 
     } 

     // If passwords do not match then IsValid is false, show do not match errors. 
     bool areEqual = String.Equals(txtPassword.Text, txtConfirmPassword.Text, StringComparison.Ordinal); 

     if (areEqual == false) 
     { 

      //Show do not match errors is password is not blank and is not invalid format 
      if (IsPasswordBlank == false && IsPasswordValid == false) 
      { 
       cvPasswordValidation.ErrorMessage = "Your passwords do not match."; 
      } 
      cvPasswordValidation.IsValid = false; 
     } 
     else 
     { 
      cvPasswordValidation.IsValid = true; 
     } 

    } 

和的.ascx：

<asp:TextBox runat="server" ID="txtPassword" MaxLength="12" autocomplete="off" TextMode="Password" ValidationGroup="vgOnlineDetails"></asp:TextBox> 

<asp:CustomValidator ID="cvPasswordValidation" 
       runat="server" 
       display="Dynamic" 
       OnServerValidate="cvPasswordValidation_ServerValidate" 
       ControlToValidate="txtPassword" 
       ValidationGroup="vgOnlineDetails"> 
</asp:CustomValidator> 

Answer 1

您需要设置ValidateEmptyText = true才能验证空字段。

Answer 2

你建议立即进行删除分配到IsValid属性后使用return。当你根本没有指定密码时的情况。如果分配后未指定return，则将执行全部三个if语句。在最后ifareEqual变量将是true，因为两个空字符串相等，并且cvPasswordValidation.IsValid = true;将被执行。在这种情况下，你的文本框将是有效的。