问题
In the Windows Azure (Preview) Management Portal you can change the configuration options for web sites (see http://www.windowsazure.com/en-us/manage/services/web-sites/how-to-configure-websites/#howtochangeconfig).
I currently set the connection string for my ADO.NET Entity Framework connection via Web.Release.Config, but I want to set it via the Management Portal, but no matter what I use, I always end up with the following error:
The specified named connection is either not found in the configuration, not intended to be used with the EntityClient provider, or not valid.
It does work for regular connection strings, ie without the metadata key defining metadata and mapping information (csdl, ssdl, msl).
Here's what I do:
I go to https://manage.windowsazure.com/#Workspaces/WebsiteExtension/Website/[MY-STAGING-SITE-NAME]/configure
Under "connection strings" I have a key named "ApplicationServices" that looks like this:
Server=tcp:xxxxx.database.windows.net,1433;Database=xxxxx;User ID=xxxxx@xxxxx;Password=xxxxx;Trusted_Connection=False;Encrypt=True;Connection Timeout=30;
This one works.
I have another key for the Entity Framework connection. Let's call that one FooBarContext. It looks like this:
metadata=res:///Models.FooBarContext.csdl|res:///Models.FooBarContext.ssdl|res://*/Models.FooBarContext.msl;provider=System.Data.SqlClient;provider connection string="Server=tcp:fooserver.database.windows.net,1433;Database=foobar;User ID=myname@fooserver;Password=xxxxxxxxxx;Trusted_Connection=False;Encrypt=True;Connection Timeout=30;"
This one causes the error described above. It is copied from the working value in Web.Release.Config, with the " replaced by a ".
I have tried other variations: with the " untouched, with metadata appended at the end, but to no avail. I have reproduced the problem with a second website.
回答1:
The solution for my problem was selecting "Custom" instead of "SQL Azure" from the "SQL Azure / SQL Server / MySQL / Custom" selector for the Entity Framework connection string, even though the database does run on SQL Azure.
[Edit] From a popular comment by @matthew-steeples below:
I would add to this for anyone else having the same issue is that sometimes the config file will have
"instead of", and the Azure Websites needs those to be changed to"
回答2:
Replace
"
with
"
In the connection string.
回答3:
Not only did I have to use double quotes (or single quotes) instead of " (and select Custom for the type) but I also had to make sure there was a dummy value in my transform config. I was replacing the entire connectionStrings node, but decided to keep that and add this:
<add xdt:Transform="Replace" xdt:Locator="Match(name)" name="FooBarEntities" connectionString="temp" providerName="System.Data.EntityClient" />
Without this, I was getting the following error:
The connection string 'FooBarEntities' in the application's configuration file does not contain the required providerName attribute.
回答4:
Beside answers above, there are 2 very important things:
- You should remove "name=" from "name=connectionString" in constructor:
public MyEntities(string connectionString) : base($"name={connectionString}") { }
- You should leave "duplicate" of connection string in app.config, but replace connection string with dummy text, correct connection string will be loaded from Azure. That's needed for providerName part. Please read: https://mohitgoyal.co/2017/07/05/update-connection-string-for-entity-framework-in-azure-web-app-settings/comment-page-1/
回答5:
I had the same problem. I solved, putting in the web.config this connectionstring:
<add name="eManagerTurModelConnection" connectionString="metadata=res://*/ORM.eManagerFinanceModel.csdl|res://*/ORM.eManagerFinanceModel.ssdl|res://*/ORM.eManagerFinanceModel.msl;provider=System.Data.SqlClient;provider connection string="Data Source=<server>.database.windows.net;Initial Catalog=eManagerTur;Integrated Security=False;User ID=<user>;Password=<Password>;Connect Timeout=15;Encrypt=False;TrustServerCertificate=False;MultipleActiveResultSets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
And after I removed the connectionstring of my website, worked, because it was not getting the connection string that I added in my web.config.
English bad... =)
来源：https://stackoverflow.com/questions/14459748/how-do-i-set-an-ado-net-entity-framework-connection-string-via-the-windows-azure