从sql服务器数据库移动到不需要客户端安装服务器（C＃Entity Framework） [英] Moving from a sql server database to one that doesn't require the client to install a server (C# Entity Framework)

问题描述

我试图使用一个sqlite数据库与实体框架。我使用的是.NET 4.5和Visual Studio 2013。

我安装了相应的sqlite nuget软件包，我已经在网上完成了一系列的教程，但 Visual Studio不在乎。

无论我做什么，我都无法连接到我的sqlite数据库。 >

我做了一个包含数据库文件的应用程序。我想要将它作为一个独立的应用程序，不需要额外的安装（sql服务器等）。

我试过了

像我说的，我一直试图让sqlite在Visual Studio中玩得很好，但我没有运气。 p>

我一直在寻找其他数据库类型，但我似乎找不到任何不需要额外的安装和可以使用实体框架。

我已经看到人们建议使用Microsoft Access数据库文件，但我没有运气得到的工作与EF。

我的问题

• 有人知道为什么Visual Studio不给我选择连接到sqlite数据库？


• Microsoft SQL Server Compact数据库是否需要从客户端安装？


• 我可以使用Microsoft Access数据库文件




结束





像往常一样，我可能过度思考这件事，也许有一个非常简单的解决方案，我的问题凝视着我的脸。非常感谢。





编辑：








根据请求，这里是我的连接字符串（尝试获取sqlite工作，而不是工作连接字符串）：

 <？xml version =1.0encoding =utf-8？> 
< configuration> 
< configSections> 
<！ - 有关Entity Framework配置的详细信息，请访问http://go.microsoft.com/fwlink/?LinkID=237468  - > 
< section name =entityFrameworktype =System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection，EntityFramework，Version = 6.0.0.0，Culture = neutral，PublicKeyToken = b77a5c561934e089requirePermission =false/> ; 
< / configSections> 
< startup> 
< supportedRuntime version =v4.0sku =。NETFramework，Version = v4.5/> 
< / startup> 
< entityFramework> 
< defaultConnectionFactory type =System.Data.Entity.Infrastructure.LocalDbConnectionFactory，EntityFramework> 
< parameters> 
< parameter value =v11.0/> 
< / parameters> 
< / defaultConnectionFactory> 
< providers> 
< provider invariantName =System.Data.SqlClienttype =System.Data.Entity.SqlServer.SqlProviderServices，EntityFramework.SqlServer/> 
< provider invariantName =System.Data.SQLitetype =System.Data.SQLite.SQLiteProviderServices，System.Data.SQLite.Linq/> 
< / providers> 
< / entityFramework> 
< system.data> 
< DbProviderFactories> 
< remove invariant =System.Data.SQLite/> 
< remove invariant =System.Data.SQLite.EF6/> 
< add name =SQLite数据提供者（Entity Framework 6）invariant =System.Data.SQLite.EF6description =SQLite（实体框架6）的网络框架数据提供者type = .Data.SQLite.EF6.SQLiteProviderFactory，System.Data.SQLite.EF6/> 
< add name =SQLite Data Providerinvariant =System.Data.SQLitedescription =。SQLite的Net Framework数据提供者type =System.Data.SQLite.SQLiteFactory，System.Data.SQLite /> 
< / DbProviderFactories> 
< /system.data> 
< connectionStrings> 
< add name =VVCDbContextconnectionString =Data Source = | DataDirectory | \VVCDatabase.sqliteproviderName =System.Data.SQLite/> 
< / connectionStrings> 
< / configuration> 
  

至于我用来访问数据库的代码，我使用DbContext访问数据库





其中一个教程我试图遵循是 this one ，当添加新的连接时，他们得到sqlite的选项：








我只能得到选项：








我已经开始空白项目，但我不知道我做错了什么。

解决方案

1：您需要从无数个sqlite软件包安装正确的vs支持包。我只能使用sqlite使用代码优先，而不是edm向导使用EF6。





2：使用SQL Server Compact无需客户端安装，请参阅我的博客。在VS中安装我的SQLCE工具箱后，您将得到完整的ef工具支持。





3：不知道，不。





4：sqlce或sqlite是你最好的选择，如果它必须是一个免费的工具，需要EF支持。




I'm going to try to keep this as short and to the point as I can.

The Problem

I'm trying to use a sqlite database with the entity framework. I am using .NET 4.5, and Visual Studio 2013.

I've installed the appropriate sqlite nuget packages, and I've followed a bunch of tutorials online to accomplish this, but Visual Studio doesn't care.

No matter what I do, I can't connect to my sqlite database.

I made an application that includes a database file. I want to be able to distribute it as a standalone application that doesn't require additional installations (sql server, etc.).

What I've Tried

Like I said, I've been trying to get sqlite to play nice with Visual Studio all night, but I've had no luck.

I've been looking around for other database types, but I can't seem to find any that don't require additional installs AND can use the entity framework.

I've seen people suggest using a Microsoft Access database file, but I haven't had luck getting that to work with EF either.

My Questions

• Does anybody know why Visual Studio doesn't give me the option to connect to a sqlite database?
• Does a Microsoft SQL Server Compact database require an install from the client?
  • If not, how can I use it with my existing code?
• Can I use a Microsoft Access database file with the Entity Framework?
• Is there a better option that I have not pursued yet?

The End

Like usual, I am probably over-thinking this whole thing, and there is probably a really simple solution to my problem staring me in the face. Any feedback/help would be greatly appreciated.

Thanks in advance!

Edit:

As requested, here is my connection string (attempting to get sqlite to work, not the working connection string):

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v11.0" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
      <provider invariantName="System.Data.SQLite" type="System.Data.SQLite.SQLiteProviderServices, System.Data.SQLite.Linq" />
    </providers>
  </entityFramework>
  <system.data>
    <DbProviderFactories>
      <remove invariant="System.Data.SQLite" />
      <remove invariant="System.Data.SQLite.EF6" />
      <add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".Net Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
    <add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".Net Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
    </DbProviderFactories>
  </system.data>
  <connectionStrings>
    <add name="VVCDbContext" connectionString="Data Source=|DataDirectory|\VVCDatabase.sqlite" providerName="System.Data.SQLite" />
  </connectionStrings>
</configuration>

As far as the code I use to access the database, I use a DbContext to access the database (which works with my current setup).

Edit Again

One of the tutorials I have tried to follow is this one, and when adding a new connection, they get the option for sqlite:

I only get the options:

I've started blank projects, and followed everything exactly, but I have no idea what I'm doing wrong.

解决方案

1: You need to install the correct vs support package from the myriad of sqlite packages. And I have only been able to make sqlite Work with EF6 using Code First, not the edm wizard.

2: With SQL Server Compact no client install is required, see my blog for details. With my SQLCE Toolbox installed in VS, you get full ef tooling support.

3: Not as far as I know, no.

4: sqlce or sqlite are your best options, if it must be a free Tool, and EF support is required.

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