我正在嘗試創建一個存儲過程來添加或更新在 c# 中執行的對象集合，但不確定為什么它在 c# 中無法正確執行而在 sql 中運行良好。我不確定如何生成一些有用的錯誤消息來幫助調試。任何指導我走向正確方向的提示或指針都非常感謝。這是示例代碼：SQL 腳本：CREATE TYPE CodeListAS TABLE(    Code varchar(255) NOT NULL UNIQUE,    Name varchar(max) NOT NULL,    GeneratedDate date NULL);GOPRINT 'Created CodeList Type';GOCREATE PROCEDURE AddOrUpdateCodes    @List AS CodeList READONLYASBEGIN    SET NOCOUNT ON;    MERGE dbo.Code AS tgt    USING @List AS src    ON tgt.Code = src.Code    WHEN MATCHED THEN        UPDATE SET Name = src.Name, GeneratedDate = src.GeneratedDate    WHEN NOT MATCHED THEN        INSERT (Code, Name, GeneratedDate) VALUES (src.Code, src.Name, src.GeneratedDate);ENDGOPRINT 'Created AddOrUpdateCodes Stored Procedure';GODECLARE @List AS CodeList;INSERT INTO @List (Code, Name, GeneratedDate) VALUES ('SQLTEST', 'SQLTEST', '2018-07-30')EXEC AddOrUpdateCodes @ListGOSELECT * FROM Symbol;C# 代碼：public int AddOrUpdateCodes(List<Code> codes){    using (var entity = new CodeEntities())    {        var dataTable = new DataTable("CodeList");        using (var reader = ObjectReader.Create(codes, "Code", "Name", "GeneratedDate"))        {            dataTable.Load(reader);        }        var sqlParameter = new SqlParameter("@List", dataTable);        sqlParameter.SqlDbType = SqlDbType.Structured;        sqlParameter.TypeName = "dbo.CodeList";        var result = entity.Database.ExecuteSqlCommand("AddOrUpdateCodes",            sqlParameter);        entity.SaveChanges();        return result;    }}