ASP.Net SQL ConnectionStrings config

问题

I am trying to pick up ASP.Net - and following the mvc tutorial: http://www.asp.net/mvc/tutorials/mvc-music-store-part-4 (Note: I am totally new to the .Net framework, both C# and ASP.Net)

At the beginning the tutorial suggested to use SQL Server Compact 4.0 - But, I got the SQL Server Express installed instead (since I will be using it after, not just for the tutorial)

SELECT @@VERSION AS [Version]

Microsoft SQL Server 2008 R2 (RTM) - 10.50.1600.1 (Intel X86) Apr 2 2010 15:53:02 Copyright (c) Microsoft Corporation Express Edition with Advanced Services on Windows NT 6.1 <X64> (Build 7600: ) (WOW64)

Now, I am having trouble when I got to the point to set up the db connection for the tutorial. The tutorial step to add this to the Web.config:

<connectionStrings>
    <add name="MusicStoreEntities"
         connectionString="Data Source=|DataDirectory|MvcMusicStore.sdf"
         providerName="System.Data.SqlServerCe.4.0"/>
</connectionStrings>  

But that doesn't work - and pretty sure it's because the different SQL Server that I am using. Suggestion on how to make this work?

I've tried changing the providerName to "System.Data.SqlClient" and it still doesnt work, and I've tried the following too:

  <connectionStrings>
    <add
       name="MusicStoreEntities"
       connectionString="Data Source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|MvcMusicStore.sdf"
       providerName="System.Data.SqlClient" />
  </connectionStrings>

And it still doesnt work with the following exception: The provider did not return a ProviderManifestToken string

Help with setting up this ASP.Net - SQL Server Express 2008 would be greatly appreciated!

---

EDIT

Seems like now I got it working, at least to connect to the db:

Now, obviously the database is empty - the tutorial didnt even say about instantiating the database, other than downloading some asset file for the db "SampeData.cs", and add it to the Global.asax.cs Application_Start method:

System.Data.Entity.Database.SetInitializer(new MvcMusicStore.Models.SampleData());

And now, 2 things:

1. The line above in Application_Start dont seem to be hit when in debug mode (I did try rebuild solution)

2. Now I am getting the following error: Model compatibility cannot be checked because the database does not contain model metadata. Ensure that IncludeMetadataConvention has been added to the DbModelBuilder conventions.

I think I am missing instantiating the data in the db - but not sure how / what - the tutorial doesnt say much

回答1:

I assume that you have restored a copy of the database to SqlExpress. Once you do that, you should add a Database element to the string with the name of the database you restored it as. A helpful resource for connectionstrings is http://www.connectionstrings.com

  <connectionStrings>
    <add
       name="MusicStoreEntities"
       connectionString="Data Source=.\SQLEXPRESS;Integrated Security=SSPI;Database=MusicStoreEntities"
       providerName="System.Data.SqlClient" />
  </connectionStrings>

Note that what you have is a link to an .sdf file, which is a SqlCE database. The |DataDirectory| portion is replaced with the location of your App_Data folder in your application.

回答2:

This is what I use:

<add name="<CONNECTION NAME>" 
     connectionString="Data Source=<SERVER NAME>;Initial Catalog=<DATABASE>;Persist Security Info=True;User ID=<USER ID>;Password=<PASSWORD>;" 
     providerName="System.Data.SqlClient" />

Replace <...> values with your corresponding values.

回答3:

I can never remember connection strings, I use this site to figure out what they need to be.

来源：https://stackoverflow.com/questions/6060643/asp-net-sql-connectionstrings-config