数据读取器与指定的不兼容。类型的成员，在数据读取器中没有对应的同名列

Question

所以我正在使用存储过程在使用 C# 的测试 MVC 应用程序中将新用户添加到 db。

我不断收到错误，我认为这是因为我将新添加的用户的 ID 返回到数据库，注释掉代码什么也没做 :(，或者更确切地说，它给了我同样的错误但抱怨不同的变量。

有趣的是，它成功添加了一个用户就好了，只是它抛出了一个异常。

我仍然希望将 ID 返回给调用程序，并且我仍然希望使用参数化查询。

代码如下：

#region AddUser
public static bool AddUser(Models.User user)
{
    bool result = false;
    Models.UserRegistrationPasswordsEntities1 db = new Models.UserRegistrationPasswordsEntities1();
    var queryResult = db.Users.SqlQuery(@"EXECUTE uspAddUser @1, @2, @3, @4, @5, @6",
                                        new SqlParameter("1", user.userFirstName),
                                        new SqlParameter("2", user.userLastName),
                                        new SqlParameter("3", user.userName),
                                        new SqlParameter("4", user.userEmail),
                                        new SqlParameter("5", user.userPassword),
                                        new SqlParameter("6", user.userDateOfBirth)).Single();


    // the ternary opertor is pretty awesome
    result = queryResult == null ? false : true;

    return result;
}
#endregion

Model.user 下面：

public partial class User
{
    public int userID { get; set; }

    [Display(Name = "First Name")]
    [DataType(DataType.Text)]
    [Required(AllowEmptyStrings = false, ErrorMessage ="First name required")]
    public string userFirstName { get; set; }

    [Display(Name = "Last Name")]
    [DataType(DataType.Text)]
    [Required(AllowEmptyStrings = false, ErrorMessage = "Last name required")]
    public string userLastName { get; set; }

    [Display(Name = "Username")]
    [DataType(DataType.Text)]
    [Required(AllowEmptyStrings = false, ErrorMessage = "Username required")]
    public string userName { get; set; }

    [Display(Name = "Email")]
    [DataType(DataType.EmailAddress)]
    [Required(AllowEmptyStrings = false, ErrorMessage = "email is required")]
    public string userEmail { get; set; }

    [Display(Name = "Date Of Birth")]
    [DataType(DataType.DateTime)]
    [Required(AllowEmptyStrings = false, ErrorMessage = "Date of Birth is required")]
    [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:MM/dd/yyyy}")]
    public DateTime userDateOfBirth { get; set;}


    [Display(Name = "Password")]
    [DataType(DataType.Password)]
    [Required(AllowEmptyStrings = false, ErrorMessage = "Password is required")]
    [MinLength(6, ErrorMessage = "Minimum of 6 characters required")]
    public string userPassword { get; set; }

    [Display(Name = "Confirm Password")]
    [DataType(DataType.Password)]
    [Required(AllowEmptyStrings = false, ErrorMessage = "Confirm password is required")]
    [Compare("userPassword", ErrorMessage = "Confirm password and password do not match")]
    public string userConfirmPassword { get; set; }

    public bool userStatus { get; set; }
    public bool userEmailVerificationStatus { get; set; }

    public System.Guid userActivationCode { get; set; }
}

错误如下：
这是我收到的错误，存储过程代码被注释掉，如下所示。如果我取消注释它会尖叫 userFirstName

数据读取器与指定的“UserRegistrationPasswordsModel.User”不兼容。类型的成员“userID”在数据读取器中没有同名的对应列。

在下面创建表格：

CREATE TABLE [dbo].[Users] (
    [userID]                      INT              IDENTITY (1, 1) NOT NULL,
    [userFirstName]               VARCHAR (50)     NOT NULL,
    [userLastName]                VARCHAR (50)     NOT NULL,
    [userName]                    VARCHAR (50)     NOT NULL,
    [userEmail]                   VARCHAR (50)     NOT NULL,
    [userPassword]                VARCHAR (255)    NOT NULL,
    [userStatus]                  BIT              DEFAULT ((0)) NOT NULL,
    [userEmailVerificationStatus] BIT              DEFAULT ((0)) NOT NULL,
    [userActivationCode]          UNIQUEIDENTIFIER DEFAULT (newid()) NOT NULL,
    [userDateOfBirth]             DATETIME         NOT NULL,
PRIMARY KEY CLUSTERED ([userID] ASC)
);

存储过程如下：
请注意，底部的 SELECT 已被注释掉，因为我认为可能将 ID 返回给调用程序是问题所在。在我的最终解决方案中，如果可能的话，我仍然希望以这种方式将 Id 返回给调用程序。

CREATE PROCEDURE uspAddUser
 @userFirstName                 VARCHAR(50)
,@userLastName                  VARCHAR(50)
,@userName                      VARCHAR(50)
,@userEmail                     VARCHAR(50)
,@userPassword                  VARCHAR(100)
,@userDateOfBirth               DATETIME

AS
SET NOCOUNT ON      -- Report Only Errors
SET XACT_ABORT ON   -- Rollback transaction on error

BEGIN TRANSACTION

DECLARE @userID  INTEGER

-- CREATE new record
INSERT INTO Users(userFirstName, userLastName, userName, userEmail, userPassword, userStatus, userEmailVerificationStatus, userDateOfBirth)
VALUES(@userFirstName, @userLastName, @userName, @userEmail, @userPassword, 0 ,0, @userDateOfBirth)  -- 1 = Active

---- return ID to calling program
--SELECT UserID FROM Users WHERE userFirstName = @userFirstName AND
--                             userLastName = @userLastName   AND
--                             userName = @userName           AND
--                             userEmail = @userEmail

COMMIT TRANSACTION

我在以下搜索解决方案时访问的资源：
Exception : Execute Insert Stored Procedure using Entity framework ExecuteStoreQuery function

https://blogs.msdn.microsoft.com/diego/2012/01/09/stored-procedures-with-output-parameters-using-sqlquery-in-the-dbcontext-api/

Get return value from stored procedure

Using Entity Framework, should I use RETURN or SELECT in my stored procedures?

感谢您的任何帮助，谢谢。

Answer 1

作为一般规则，当使用SELECT 语句和SqlQuery 方法（而不是单个属性）时，您需要返回full part of the entity。将存储过程中的SELECT 语句更改为：

SELECT TOP 1 * FROM Users 
WHERE userFirstName = @userFirstName AND userLastName = @userLastName 
AND userName = @userName AND userEmail = @userEmail

然后，执行到queryResult：

var queryResult = db.Users.SqlQuery(@"EXECUTE uspAddUser @1, @2, @3, @4, @5, @6",
                                        new SqlParameter("1", user.userFirstName),
                                        new SqlParameter("2", user.userLastName),
                                        new SqlParameter("3", user.userName),
                                        new SqlParameter("4", user.userEmail),
                                        new SqlParameter("5", user.userPassword),
                                        new SqlParameter("6", user.userDateOfBirth)).Single();

如果你想从AddUser方法中获取userID，你可以从上面的查询结果中调用它（并将返回类型改为int而不是bool）：

int userId = queryResult.userID;

return userId;

旁注：

由于userID被声明为主键标识列，所以在EF模型类中将KeyAttribute和DatabaseGeneratedAttribute设置对应的属性为主键：

public partial class User
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int userID { get; set; }

    // other properties

}

类似问题：

does not have a corresponding column in the data reader with the same name