EF 5.0（数据库优先模型）不适用于一个表 [英] EF 5.0 (Database-First Model) not working on one table

问题描述

我有一个名为TBLFIRM的数据库表。我正在使用acc数据库优先模型。 EF准备的SQL错误。

I have a database table called TBLFIRM. I am using acc database-first model. EF prepares the sql wrong. What can be wrong on this object?

谢谢

我的语法，一个非常简单的调用：

My Syntax, a very simple call:

TBLFIRM d = VT.TBLFIRMs.FirstOrDefault(p => p.ID > 0);

EF 5准备的SQL语法

The SQL syntax that EF 5 prepares

SELECT TOP (1) 
[Extent1].[ID] AS [ID], 
[Extent1].[DISTID] AS [DISTID], 
[Extent1].[SESSIONKEY] AS [SESSIONKEY], 
[Extent1].[NAME] AS [NAME], 
[Extent1].[PHONE] AS [PHONE], 
[Extent1].[EMAIL] AS [EMAIL], 
[Extent1].[CREATEUSER] AS [CREATEUSER], 
[Extent1].[CREATEDATE] AS [CREATEDATE], 
[Extent1].[UPDATEUSER] AS [UPDATEUSER], 
[Extent1].[UPDATEDATE] AS [UPDATEDATE], 
[Extent1].[AUTHORIZEDUSERNAME] AS [AUTHORIZEDUSERNAME], 
[Extent1].[AUTHORIZEDUSEREMAIL] AS [AUTHORIZEDUSEREMAIL], 
[Extent1].[AUTHORIZEDUSERPHONE] AS [AUTHORIZEDUSERPHONE], 
[Extent1].[SENDEMAIL] AS [SENDEMAIL], 
[Extent1].[REPLYEMAIL] AS [REPLYEMAIL], 
[Extent1].[ACTIVE] AS [ACTIVE], 
[Extent1].[CANLOGIN] AS [CANLOGIN], 
[Extent1].[INTERNALNAME] AS [INTERNALNAME], 
[Extent1].[TBLDISTRIBUTOR_ID] AS [TBLDISTRIBUTOR_ID]
FROM [dbo].[TBLFIRMs] AS [Extent1]
WHERE [Extent1].[ID] > 0

上下文类

public DbSet<TBLFIRM> TBLFIRMs { get; set; }

TBLFirm类

 public partial class TBLFIRM
    {
        public TBLFIRM()
        {
            this.TBLFIRMSETTINGS = new HashSet<TBLFIRMSETTING>();
            this.TBLFIRMSMTPs = new HashSet<TBLFIRMSMTP>();
            this.TBLMAILFIRMMATCHes = new HashSet<TBLMAILFIRMMATCH>();
            this.TBLMAILGROUPs = new HashSet<TBLMAILGROUP>();
            this.TBLMAILTEMPLATEs = new HashSet<TBLMAILTEMPLATE>();
            this.TBLSCHEDULEs = new HashSet<TBLSCHEDULE>();
            this.TBLUSERGROUPs = new HashSet<TBLUSERGROUP>();
            this.TBLUSERS = new HashSet<TBLUSER>();
        }

        public int ID { get; set; }
        public int DISTID { get; set; }
        public string SESSIONKEY { get; set; }
        public string NAME { get; set; }
        public string PHONE { get; set; }
        public string EMAIL { get; set; }
        public string CREATEUSER { get; set; }
        public Nullable<System.DateTime> CREATEDATE { get; set; }
        public string UPDATEUSER { get; set; }
        public Nullable<System.DateTime> UPDATEDATE { get; set; }
        public string AUTHORIZEDUSERNAME { get; set; }
        public string AUTHORIZEDUSEREMAIL { get; set; }
        public string AUTHORIZEDUSERPHONE { get; set; }
        public string SENDEMAIL { get; set; }
        public string REPLYEMAIL { get; set; }
        public Nullable<bool> ACTIVE { get; set; }
        public Nullable<bool> CANLOGIN { get; set; }
        public string INTERNALNAME { get; set; }

        public virtual TBLDISTRIBUTOR TBLDISTRIBUTOR { get; set; }
        public virtual ICollection<TBLFIRMSETTING> TBLFIRMSETTINGS { get; set; }
        public virtual ICollection<TBLFIRMSMTP> TBLFIRMSMTPs { get; set; }
        public virtual ICollection<TBLMAILFIRMMATCH> TBLMAILFIRMMATCHes { get; set; }
        public virtual ICollection<TBLMAILGROUP> TBLMAILGROUPs { get; set; }
        public virtual ICollection<TBLMAILTEMPLATE> TBLMAILTEMPLATEs { get; set; }
        public virtual ICollection<TBLSCHEDULE> TBLSCHEDULEs { get; set; }
        public virtual ICollection<TBLUSERGROUP> TBLUSERGROUPs { get; set; }
        public virtual ICollection<TBLUSER> TBLUSERS { get; set; }
    }

推荐答案

经过更深入的研究后，我通过BRian Rogers @ 代码优先与数据库优先的回复，能够找到并解决问题。

After a deeper research I was able to find and fix the problem thanks to a reply by BRian Rogers @ Code First vs. Database First.

如果您首先使用数据库或模型，则连接字符串必须具有元数据，否则EF将此解释为代码优先方法。

If you are approaching Database or Model First the the connection string must have a metadata, otherwise EF interprets this as Code First approach.

当我从网站调用包含EF对象的库时，web.config的连接字符串是一个纯数据库连接。

As I was calling the library holding EF objects from a web site, the web.config's connectionstring was a plaing database connection.

<add name="EmmContext" connectionString="Data Source=.;Initial Catalog=GPMM;Persist Security Info=True;User ID=********;Pwd=******" providerName="System.Data.SqlClient"/>

更改为

<add name="EmmContext" connectionString="metadata=res://*/DAL.DBModel.csdl|res://*/DAL.DBModel.ssdl|res://*/DAL.DBModel.msl;provider=System.Data.SqlClient;provider connection string=&quot;data source=.;initial catalog=GPMM;persist security info=True;user id=*******;password=********;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient"/>

它就像一种魅力。

只是想分享这种特殊的经验。谢谢Brian Rogers！ ：-）

Just wanted to share this particular experience. Thank you Brian Rogers! :-)

这篇关于EF 5.0（数据库优先模型）不适用于一个表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！