无法使用 [Remote] 数据注释属性验证现有电子邮件 ID

Unable to Validate Existing email Id using [Remote] data annotation attribute(无法使用 [Remote] 数据注释属性验证现有电子邮件 ID)

问题描述

我想使用模型中的 [远程] 数据注释来验证数据库中电子邮件 ID 的存在.但是当我调用远程 JsonResult Action 方法时，参数将为空，结果将始终为 false 并显示错误消息.我的代码有什么问题?

I want to validate existence of Email Id in database using [Remote] data Annotation in Model. But when I call a remote JsonResult Action method the parameter will be null and the result will be always be false and error message will be displayed. What is the problem in my code?

模型:

public class RegisterModel
{
    [Required(ErrorMessage = "Email is Required!", AllowEmptyStrings = false)]
    [Remote("IsEmailIdExists", "Account", ErrorMessage = "Email Id already exists in Database")]
    [Display(Name = "Email Id")]
    [RegularExpression("[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+.[A-Za-z]{2,4}", ErrorMessage = "Invalid Email Id")]
    public string Email { get; set; }

    [Required(ErrorMessage = "Password is Required!", AllowEmptyStrings = false)]
    [DataType(DataType.Password)]
    [RegularExpression(@"(?=^.{8,15}$)((?=.*d)(?=.*[A-Z])(?=.*[a-z])|(?=.*d)(?=.*[^A-Za-z0-9])(?=.*[a-z])|(?=.*[^A-Za-z0-9])(?=.*[A-Z])(?=.*[a-z])|(?=.*d)(?=.*[A-Z])(?=.*[^A-Za-z0-9]))^.*", ErrorMessage = "Invalid Password!")]
    public string Password { get; set; }

    [System.ComponentModel.DataAnnotations.Compare("Password", ErrorMessage = "Confirm password dose not match!")]
    [Required(ErrorMessage = "Confirm Password is Required!")]
    [DataType(DataType.Password)]
    public string ConfirmPassword { get; set; }
}


public class EmailExists
    {
         public bool EmailCheck(string _email)
         {
              try
              {
                 var con = new SqlConnection();
                 con.ConnectionString = ConfigurationManager.ConnectionStrings["DBConnection"].ConnectionString;
                 SqlCommand com = new SqlCommand("spCheckEmail", con);
                 com.CommandType = CommandType.StoredProcedure;
                 com.Parameters.Add("@uname", SqlDbType.NVarChar, -1).Value = _email;
                 con.Open();
                 com.CommandTimeout = 120;
                 SqlDataReader reader = com.ExecuteReader();
                 if (reader.HasRows)
                 {
                     if (reader.Read())
                     {
                          if (reader["Active"].ToString() == "True")
                          {
                               reader.Dispose();
                               com.Dispose();
                               return true;
                          }
                          else
                          {
                               return false;
                          }
                     }
                     else
                     {
                          return false;
                     }
                 }
                 else
                 {
                     reader.Dispose();
                     com.Dispose();
                     return false;
                 }
                 con.Close();
                 com.Dispose();
            }
            catch(Exception ex)
            {
                return false;
            }
       }
   }

帐户控制器

public JsonResult IsEmailIdExists(string EmailId) -> Always Null

{
      Model.EmailExists emailCheck = new FresherModel.EmailExists();
      if(!emailCheck.EmailCheck(EmailId))
      {
           return Json(false);
      }
      else
      {
          return Json(true);
      }
}

推荐答案

您的资产名称是 Email.更改您的操作方法的签名以匹配

The name of your property is Email. Change the signature of your action method to match

public JsonResult IsEmailIdExists(string Email)
{
  .....

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