Question

执行时，我无法从存储过程中读取值。

这是我的存储过程

ALTER Procedure [dbo].[SaveInvitation]
(
    @InvitationID INT OUTPUT,
    @UserID INT,
    @Email NCHAR(100),
    @InvitationGUID  UNIQUEIDENTIFIER OUTPUT
)
AS
BEGIN
SET NOCOUNT ON;

BEGIN TRY
    IF @UserID = -1
        BEGIN
            SET @UserID = NULL
        END

    IF NOT EXISTS (SELECT 1 FROM Invitations WHERE LTRIM(RTRIM(Email)) = LTRIM(RTRIM(@Email)))
        BEGIN
            INSERT INTO Invitations (UserID,
                    Email,
                    CreateDate)
            VALUES (@UserID,
                    @Email,
                    GETDATE())

            -- GET NEWLY INSERTED INVITATIONS ID
            SET @InvitationID = IDENT_CURRENT('Invitations')

            -- GET GUID FROM INVITATION ID
            SELECT  @InvitationGUID = InvitationGUID
            FROM    Invitations
            WHERE   InvitationID = @InvitationID
        END
    ELSE
        BEGIN
            RAISERROR('ALREADY_INVITATED', 16, 127)
        END
END TRY
BEGIN CATCH
    IF @@TRANCOUNT > 0
        BEGIN
            ROLLBACK
        END
    EXEC ThrowError
END CATCH
END

我正在从此函数执行此过程

我的DataBaseModel.Designer.cs：

public ObjectResult<SaveInvitation_Result> SaveInvitation(ObjectParameter invitationID, Nullable<global::System.Int32> userID, global::System.String email, ObjectParameter invitationGUID)
    {
        ObjectParameter userIDParameter;
        if (userID.HasValue)
        {
            userIDParameter = new ObjectParameter("UserID", userID);
        }
        else
        {
            userIDParameter = new ObjectParameter("UserID", typeof(global::System.Int32));
        }

        ObjectParameter emailParameter;
        if (email != null)
        {
            emailParameter = new ObjectParameter("Email", email);
        }
        else
        {
            emailParameter = new ObjectParameter("Email", typeof(global::System.String));
        }

        return base.ExecuteFunction<SaveInvitation_Result>("SaveInvitation", invitationID, userIDParameter, emailParameter, invitationGUID);
    }

抛出异常

数据阅读器与指定的'TestModel.SaveInvitation_Result'不兼容。类型为“InvitationGUID”的成员在数据读取器中没有相应名称的相应列。

我创建了一个复杂类型，即SaveUserRegistration_Result，并导入了一个返回类型为SaveInvitation的函数SaveUserRegistration_Result。

如何解决上述异常？存储过程有变化吗？

屏幕截图

enter image description here

Answer 1

它给你这个错误，因为你实际上并没有SELECT结果。如果您在的末尾添加了一行 ，例如：

SELECT @InvitationGUID AS InvitationGUID

它应该对你有用。

读取存储过程参数值时出现问题

1 个答案: