问题
I'm initializing Entity Framework Object context, and this gives me the keyword not supported error:
metadata=res://*/MainDB.csdl|res://*/MainDB.ssdl|res://*/MainDB.msl;provider=System.Data.SqlClient;provider connection string="Data Source=.\SQLEXPRESS;AttachDbFilename=D:\Workspace\vs\Leftouch\Leftouch.Web\Data\Leftouch.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True;App=EntityFramework"
I took the connection string directly from web.config which was working, and modified only the path to the file (which I set dynamically), and instead of using the default value, used this connection string explicitly. What could cause this error?
回答1:
The real reason you were getting this error is because of the " values in your connection string.
If you replace those with single quotes then it will work fine.
http://blogs.msdn.com/b/rickandy/archive/2008/12/09/explicit-connection-string-for-ef.aspx
(Posted so others can get the fix faster than I did.)
回答2:
I fixed this by changing EntityClient back to SqlClient, even though I was using Entity Framework.
So my complete connection string was in the format:
<add name="DefaultConnection" connectionString="Data Source=localhost;Initial Catalog=xxx;Persist Security Info=True;User ID=xxx;Password=xxx" providerName="System.Data.SqlClient" />
回答3:
This appears to be missing the providerName="System.Data.EntityClient" bit. Sure you got the whole thing?
回答4:
Believe it or not, renaming LinqPad.exe.config to LinqPad.config solved this problem.
回答5:
Just use \" instead ", it should resolve the issue.
回答6:
Make sure you have Data Source and not DataSource in your connection string. The space is important. Trust me. I'm an idiot.
来源：https://stackoverflow.com/questions/6997035/keyword-not-supported-data-source-initializing-entity-framework-context