I have an Azure Function system that's using a DAL dll. This dll uses entity framework to connect to a SQL database and is in the UnitOfWork format for our database first code.
In azure functions there isn't the standard "app.config" file to update with my connection string to my database. So I added it here in the Application Setting's GUI:
I have copied the code from the app.config by just taking the value from the config, converting the " values, and pasting it into the GUI.
<add name="Entities" connectionString="<This is what I copied>" providerName="System.Data.EntityClient" />
However, whenever I run the code, I get this error:
2016-10-14T12:39:44.248 C# ServiceBus queue trigger function processed message: test
2016-10-14T12:39:44.265 Getting UnitOfWork
2016-10-14T12:39:44.607 Getting Repository
2016-10-14T12:39:44.639 ERROR The connection string 'Entities' in the application's configuration file does not contain the required providerName attribute."
So, typically the provider name would be the entity framework, but I don't know how to include that in the code. My question is, how do I connect with this connection string, and have an entity framework provider?
If you are using Entity Framework 6 or greater, have you tried using Code-based configuration? Some sample implementation can be found here,
http://www.entityframeworktutorial.net/entityframework6/code-based-configuration.aspx
How to set connection in Entity Framework 6 using Code-Based Configuration
Related
I am trying to run a test project, to debug the code, but the moment its trying to save data to a table in database its giving this error:
Schema specified is not valid. Errors: MSLEntities.ssdl(2,2) : error 0152: No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClient'. Make sure the provider is registered in the 'entityFramework' section of the application config file.
Made sure that both are using the same version of EF (6.0). Check.
Tried to enter the provider name in the connection string but
already using providerName="System.Data.EntityClient"
Tried removing and reinstalling EF using PM console. Check. Manually
removed Ef references and readded them. Check.
What am I missing?
I've a solution with different projects. I'm using EF6 in my 'DALProject' structured with a repository pattern. What I need to do is to make CRUD operations from another project called 'MainProject' that references the one above, but I receive this error: `
No connection string named 'MyEntity' could be found in the application config file
To resolve this my idea is to pass directly the connection string to the DBContext constructor.
So I copied in an external file the connection string that is in the App.Config of my DALProject, and then I'm going to read this file from the MainProject. This is the connection string:
metadata=res://*/My_Model.csdl|res://*/My_Model.ssdl|res://*/My_Model.msl;provider=System.Data.SqlClient;provider connection string="data source=192.xxx.xxx.xxx\SQL2008R2EXP;initial catalog=My_Catalog;persist security info=True;user id=sa;password=xxxxxx;multipleactiveresultsets=True;application name=EntityFramework"
When this is done I try to set the DBContext in this way:
public class My_Entities : DBContext{
public My_Entities(string connStr)
: base (connStr){}
}
But what I got is this error: `
No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClient'. Make sure the provider is registered in the 'entityFramework' section of the application config file. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information.`
Any helps?
I got a ASP.NET MVC 5 project which is already published in a server. But I have to extend it. Thus I'm trying to make local development environment with local database. I don't want to loss any data which is already working. As this is huge project. So all model and controller is done.
I'm also not an expert in ASP.NET world. After searching for a while I found there is way called code first approach.
As I have all the model so I'm assuming it should be able to make all local database in my machine.
The actual project connection strings looks like this:
<connectionStrings>
<clear />
<add name="Name.DataSourceConnectionString"
connectionString="Data Source=test.test.com;User ID=myUser;Password=myPass"
providerName="System.Data.SqlClient" />
</connectionStrings>
So for local machine I updated as:-
<connectionStrings>
<add name="My TEST"
connectionString="Data Source= 192.168.1.12;Initial Catalog=MyDB;Persist Security Info=True;User ID=dev;Password=dev"
providerName="System.Data.SqlClient" />
</connectionStrings>
I got project source and build and launch the service locally. When I try to logged in I get following error:-
The model backing the 'ApplicationDbContext' context has changed since the database was created. Consider using Code First Migrations to update the database (http://go.microsoft.com/fwlink/?LinkId=238269).
Note that same login is working fine in server.
Then I follow the link.
In package management console I insert command enable-migrations and then update-database -Force. I got following error:-
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
I have SQL Server 2012 Express installed. I suspect my connection string is not defined correctly. How do I define it? Also any suggestion how to have local set-up development environment for working ASP.NET service?
connectionString="Server=myip;Port=3306;Database=mydatabase;Uid=admin;Pwd=password;"
you could try this maybe you missing port and select database don't know how many database is configure in your mssql server.
Code First, despite its name, can either create a new database or work with an existing database. However, and this is key, it cannot both create and manage tables and work with existing tables in the same database (at least not with the same context).
You can have multiple contexts, but they must be entirely segregated, i.e. they can't reference entities tracked by a different context or they'll attempt to take control of those entities away from that other context.
Long and short, if you have an existing database that you need to work with, Code First migrations are pretty much out the window. You can create new entity types, but you'll need to create the tables for them manually in your database.
As far as just get a local copy goes, though, all you need to do is take a backup of the production DB and restore it locally. It really has nothing to do with Entity Framework or MVC.
I want to use SQLite with Entity Framework. I installed the SQLite and did some specific changes in my app.config file. I can see the SQLite option in the data provider list.
When I select, it asks a connection string. After I write the connection string get the error saying :
An unexpected error occured in .NET framework data provider for SQLite
Regards, Mehmet
SQLite 1.0.9xx and EF 6.1.xx are very finicky to set up. Please see if my answer here works for you (be sure to watch the video) : Database first create entity framework 6.1.1 model using system.data.sqlite 1.0.93
I'am trying to use Entity Framework with Postgresql Database in my Silverlight application ,for that I am using npgsql data provider .
Fowlowing this link I registered Npgsql and Mono.Security in the GAC, and I added a provider factory entry into section of machine.config. I created a .edmx file with EdemGen2 and finaly I added a string connexion to my app.config as follows:
<add name="PostgreDatabase" connectionString="metadata=res://*/EspaceModel.csdl|res://*/EspaceModel.ssdl|res://*/EspaceModel.msl; provider=Npgsql;provider connection string=" Port=5432;Encoding=WIN1252;Server=localhost; Database=postgis;UserId=postgres;Password=admin"" providerName="Npgsql"/>
But, I still can't access my data. Any Help ?