问题描述
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。