在C＃MVC实体框架中创建和使用不在EF模型中的动态表

如何解决在C＃MVC实体框架中创建和使用不在EF模型中的动态表

环境为 C＃， MVC ，实体框架， SQL Server 。数据类型是固定的，但表名不是固定的。创建它是为了在运行期间利用某些SQL功能。其名称因UserId而异。

问题是创建后，当我遍历循环，执行工作，执行查询，然后进行插入时。那是记录1.没问题。设置了下一个查询查询，以提取刚刚添加的内容，但由于实体框架错误而失败。

完成后，可能有成百上千的用户同时通过此代码，我真的不想进行模型路线的动态更改。我担心在生产中会破坏EF模型。我想让它尽可能简单。类“ TempProspect”在EF模型之外。临时表也是如此。 EF是否可能因为其处于“广告系列”模式而参与其中？同一数据库？希望不会。

创建：

int abc = db.Database.ExecuteSqlCommand
        ("IF NOT EXISTS (SELECT * FROM sysobjects WHERE name='TempProspectsUid" + GlobalConstants.CurrentUser.UserId + "' AND xtype='U')" +
            "CREATE TABLE [Campaigns].[TempProspectsUid" + GlobalConstants.CurrentUser.UserId + "]" +
            "(" +
                "[Id] [int] IDENTITY(1,1) NOT NULL," +
                "[IdxMatchingFirstLastNames1] [varchar] (128) NULL," +
                "[IdxMatchingFirstLastNames2] [varchar] (128) NULL," +
                "[IdxMatchingStreet1] [varchar] (64) NULL," +
                "[IdxMatchingCompanyName1] [varchar] (48) NULL," +
                "[IdxMatchingCompanyName2] [varchar] (48) NULL," +
                "[ProspectGroupId] [int] NULL," +
                "[CompanyId] [int] NULL," +
                "[CompanyName] [nvarchar](48) NULL," +
                "[Department] [nvarchar](48) NULL," +
                "[Division] [nvarchar](48) NULL," +
                "[Position] [nvarchar](48) NULL," +
                "[Gender] [char](1) NULL," +
                "[DateOfBirth] [varchar](10) NULL," +
                "[Title] [varchar](10) NULL," +
                "[FirstName] [nvarchar](64) NULL," +
                "[MiddleName1] [nvarchar](32) NULL," +
                "[MiddleName2] [nvarchar](32) NULL," +
                "[LastName] [nvarchar](64) NULL," +
                "[NameSuffix] [nvarchar](16) NULL," +
                "[PhoneHome] [varchar](24) NULL," +
                "[PhoneMobile] [varchar](24) NULL," +
                "[PhoneWork] [varchar](24) NULL," +
                "[MobileProvider] [smallint] NULL," +
                "[EmailPersonal] [varchar](64) NULL," +
                "[EmailWork] [varchar](64) NULL," +
                "[Language] [smallint] NULL," +
                "[Street1] [varchar](64) NULL," +
                "[Street2] [varchar](64) NULL," +
                "[PobGeneral] [varchar](64) NULL," +
                "[SpecialDelivery] [varchar](64) NULL," +
                "[City] [varchar](64) NULL," +
                "[StateOrProvince] [varchar](64) NULL," +
                "[ZipOrPostalCode] [varchar](16) NULL," +
                "[CountryCode] [int] NOT NULL," +
                "CONSTRAINT [PK_TempProspectsUid" + GlobalConstants.CurrentUser.UserId + "] " +
                    "PRIMARY KEY CLUSTERED( [Id] ASC )," +
                "INDEX Idx_MatchingFirstLastNames1 NONCLUSTERED(IdxMatchingFirstLastNames1)," +
                "INDEX Idx_MatchingFirstLastNames2 NONCLUSTERED(IdxMatchingFirstLastNames2)," +
                "INDEX Idx_MatchingStreet1 NONCLUSTERED(IdxMatchingStreet1)," +
                "INDEX Idx_MatchingCompanyName1 NONCLUSTERED(IdxMatchingCompanyName1)," +
                "INDEX Idx_MatchingCompanyName2 NONCLUSTERED(IdxMatchingCompanyName2)" +
                "WITH (PAD_INDEX = OFF,STATISTICS_NORECOMPUTE = OFF,IGNORE_DUP_KEY = OFF," +
                    "ALLOW_ROW_LOCKS = ON,ALLOW_PAGE_LOCKS = ON) " +
            "ON [PRIMARY]) " +
            "ON [PRIMARY]"
        );

查询：（我已经尝试了许多不同的语法，包括Object []和SQLParameter等，都以相同的结果失败了）

lstTempProspects = db.Database.SqlQuery （$“ SELECT * FROM [Campaigns]。[TempProspectsUid {GlobalConstants.CurrentUser.UserId}]，其中IdxMatchingFirstLastNames2 ='{qm1}'”）。ToList（）;

插入：

int numberOfRowsInserted = db.Database.ExecuteSqlCommand
(@"INSERT INTO [Campaigns].[TempProspectsUid" + GlobalConstants.CurrentUser.UserId + "] " +
             "(IdxMatchingFirstLastNames1,IdxMatchingFirstLastNames2,IdxMatchingStreet1," +
             "IdxMatchingCompanyName1,IdxMatchingCompanyName2,ProspectGroupId,CompanyId," +
              "CompanyName,Department,Division,Position,Gender,DateOfBirth," +
              "Title,FirstName,MiddleName1,MiddleName2,LastName,NameSuffix," +
              "PhoneHome,PhoneMobile,PhoneWork,MobileProvider,EmailPersonal," +
              "EmailWork,Language,Street1,Street2,PobGeneral,SpecialDelivery," +
              "City,StateOrProvince,ZipOrPostalCode,CountryCode) " +
              "VALUES " +
             "('" + 
              tp.IdxMatchingFirstLastNames1 + "','" + tp.IdxMatchingFirstLastNames2 + "','" + 
              tp.IdxMatchingStreet1 + "','" + tp.IdxMatchingCompanyName1 + "','" +
              tp.IdxMatchingCompanyName2 + "','" + tp.CompanyName + "','" + 
              tp.Department + "','" + tp.Division + "','" +
              …….
              tp.Street1 + "','" + tp.Street2 + "','" + tp.PobGeneral + "','" +
               tp.SpecialDelivery + "','" + tp.City + "','" + tp.StateOrProvince + "','" +
               tp.ZipOrPostalCode + "','" + tp.CountryCode + "')"

错误：

引发的异常：EntityFramework.dll中的“ System.InvalidOperationException” 引发异常：mscorlib.dll中的'System.InvalidOperationException'

解决方法

业余错误/简单的调试解决方案（尝试/捕获）：

意识到之后，我需要的提示比：抛出异常：EntityFramework.dll中的'System.InvalidOperationException'。抛出异常：mscorlib.dll中的'System.InvalidOperationException'

我将try / catch放入逻辑中并得到： “从具体化的'System.String'类型到可空的'System.DateTime'类型的指定转换无效。”

现在不是更多帮助了吗？是的，弄乱了表中的字符串和模型中的DateTime。我能说什么愚蠢的错误。是的，关于如何创建索引和如何为SQL查询创建字符串还有其他错误，这绝不是我怀疑的Entity Framework的过错。与跟踪等无关。没有兔子的所有兔子洞。只是简单的日期类型不匹配。

在C＃MVC实体框架中创建和使用不在EF模型中的动态表

如何解决在C＃MVC实体框架中创建和使用不在EF模型中的动态表

解决方法

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