Can someone explain how I can update an existing project using EF 4.1 to use the latest EF 5.x in Visual Studio 2010?
I have already used NuGet to download the EF 5.x code. Is it simply a matter of replacing the reference of 'EntityFramework' to the one from EF 5.x? If so where is the EF 5.x code stored on my local drive? With EF 4.1 there was a directory called 'Microsoft Entity Framework 4.1' but I don't see anything like that for EF 5.x.
When you download the package from NuGet it will add the references for you, if you want to locate the binaries (although you shouldn't have to) they can be found in the /packages folder in the root of your solution.
You can double-check the reference has been added by expanding the 'References' solution folder as normal.
Related
I installed EF with NuGet and the project's dependencies folder shows warning that EF may not be compatible. Which package do I install to use EF from the standard library?
I installed this EF:
Here is the assembly used in another project of the solution:
That's because you added the package for EF 6.2, which only targets the Full framework. It won't work on the .NET Core Runtime.
You need to use Entity Framework Core. This is was fully rewritten to target .NET Standard and fix many of the problems people had with the older Entity Framework.
Since it targets .NET Standard, it can be used in all runtimes - .NET Core, Full framework and UWP projects.
Its new features make it a great choice for the Full framework as well. For example, EF Core 2.2 added spatial types support, by using the open source NetTopologySuite package. Even EF 6.2 never had spatial type support.
Entity Framework Core is broken into various packages which enables you to add only the drivers/features you need to your project. Even the SQL Server provider is available as a separate package. A list of providers is available here
Luckily, each provider brings in all other required dependencies so all you need to do is include a provider to bring in all other required packages as transitive dependencies. That means, they don't appear as dependencies in Visual Studio or the csproj file. No more 50 package references that we don't know what to do about!
For SQL Server, you need to include Microsoft.EntityFrameworkCore.SqlServer, eg with
dotnet add package Microsoft.EntityFrameworkCore.SqlServer
You need to add Microsoft.EntityFrameworkCore.Tools if you want to use database migration commands. If not, just don't add the package. You can always add it later.
Do add Microsoft.EntityFrameworkCore.Analyzers. It's a Roslyn analyzer that checks for common EF Core errors, especially when you use the RawSql method. It's way too easy to get this wrong.
Consider adding Microsoft.EntityFrameworkCore.InMemory in your test projects. It's a simple in-memory provider that can be used to test EF code without connecting to a database as shown here
Which package do I install to use EF from the standard library?
Just as Panagiotis pointed out, you should use Microsoft.EntityFrameworkCore instead of EntityFramework.
If you download those two packages from nuget.org, EntityFramework, Microsoft.EntityFrameworkCore, then open it with NuGet Package Explorer(You can get it from Microsoft Store.):
So, if you want to use EF from the standard library, you should install the nuget package Microsoft.EntityFrameworkCore.
Hope this helps.
I created a new MVC project in Visual Studio 2017. I wanted to add an EDMX file (I will be doing database-first) so right clicked on the project and selected Add|New Item.
However, I cannot find the Entity Framework components that were available in the previous versions of Visual Studio. Does anyone know where they went?
I had a similar issue today after i updated my VS to the latest 2017 version. I tried to open an .edmx file in VS2017 and it didn't show the designer view. So i realised i forgot to select Entity Framework tools during the installation:
Everything is back to normal :)
In .NET Framework-based projects, the Entity Framework 6 templates are still there. However, for .NET Core-based projects, I believe you're expected to use the dotnet ef commands. This includes a means of scaffolding a code-first DbContext from an existing database. See ASP.NET Core - Existing Database.
To verify this, I setup a demo project with the following structure:
The New Item/Data dialog for the .NET Framework project:
Note that there is also an EF POCO Generator template available in the Online templates section that may be of interest to you:
I know this is late, but I ran into the same exact issue. After reading some of the other answers, I realized I had created a .Net project with Standard library instead of the Framework library.
I faced this issue, while creating an MVC application on my latest installation of VS2017.
Failed:
Tried installing Entity Framework using Nuget package manager[Install-Package EntityFramework], but failed to show Ado.NET Entity data model
Success:
1. open programs under control panel and select Visual Studio 2017
2. select Change the installation
3. Select Modify installation
4. Select Individual components
5. If SQL server data tools already installed, deselect/uninstall this component and reinstall the same again.
6. uninstall and reinstall SQL Server Data tools
Note: with one component change, other components may also be deleted. You have to recheck while reinstalling
We have recently upgraded our Visual Studio from 2010 to 2013. With it came EF 6.0, which is incompatible with the code generated from EF 4.
I need to update a table in the model with the latest version from the DB schema. When doing that, both "Update" and "Add" after deletion of the table definition do the following:
Remove all custom code already written for all types in the model, even if they are in separate files than the model;
Generate the new EF 6.0 bindings;
(optionally) Generate the new repository.
Now, that's obviously not the same behavior as in EF 4, which only regenerated the repository and did not touch the custom code.
We are not using NuGet, but referencing the EF library inside the project.
I guess VS 2013 uses a different version of the code generator than VS 2010. How can we revert to the old behavior?
UPDATE:
I have tried using NuGet to download EF 4.3.1 and repeat the update model steps (also delete and then recreate), but I am still seeing the old behavior. I think there is a problem with the VS 2013 EF Code Generator.
For me, the following solution worked.
Double-click on your edmx file and open its properties window. Change Code Generation Strategy from T4 to Legacy Object Context. Build your solution. It may cause thousands of errors because you have redeclared functions and properties, so remove all files that weren't there before.
I have a web application on a web farm and i use .NET 4 and entity data model 4.1.
when i started working on this web application i used visual studio 2010, and today i have uninstalled it and installed new version (Visual Studio 2012).
Due to some reasons, i have deleted my ado.net entity data model to recreate it, but i
pay attention that visual studio 2012 use entity framework 5 not 4.1. I have updated it but in old model i can context constructor to change my connection string but in this new model have no constructor, is that true?
I have installed EF 4.1 but it doesn't works and I've added version 5 to my project.
Background info: my web application is on a shared host and i can not update it to EF 5.
How can i use entity framework 4.1 in visual studio 2012 ?
is that possible? if yes, how?
Remove Existing (Entity framework 5)
Remove the existing reference (to Entity framework 5) under the References section in your Project in Solution explorer.
Remove the corresponding entry from your packages.config file. If you open the packages.config file, you will see an xml structure and you will see an element with id EntityFramework with version attribute value as 5.0.0. Remove that line( that package element).
Add Again (Entity framework 4.1)
Now go to the package manager window(View->Other Windows -> Package Manager Console) and execute the following command there.
Install-Package EntityFramework -Version 4.1.10331.0
This will download EF 4.1 to your project and you will see the success message like below.
Reference : http://nuget.org/packages/EntityFramework/4.1.10331.0
Always keep in mind that there are a lot of improvements made in EF 5. So consider to consume all those as possible as you can.
Are you tired of checking if a newer version of the library you're using has been released, or when you update to new versions, change all references in all csproj projects?
For example, I have many csproj projects using those references:
<HintPath>..\..\..\Referencias Externas\Microsoft.Practices.EnterpriseLibrary 4.1\Microsoft.Practices.EnterpriseLibrary.ExceptionHandling.Logging.dll</HintPath>
...more...more...
<HintPath>..\..\..\Referencias Externas\Unity 1.2\Microsoft.Practices.Unity.dll</HintPath>
...more...more...
<HintPath>..\..\..\Referencias\Company\2.0\Company.Common.dll</HintPath>
Now, I would like use new versions, EnterpriseLibrary 5.0, Unity 2.1, NHibernate 3.2, etc, and references to Company Framework (Company.Common.dll, etc), but I need changes all references in many,many projects.
any extension in VS2010 for do it easy and quick?
I would like any like ProjectConverter - Auto update DevExpress references http://www.devexpress.com/Support/Center/p/Q308968.aspx
Reference:
http://feedback.wovs.com/forums/71955-extension-ideas/suggestions/1003595-automatic-reference-update
Use the package manager nuget to manage your dependencies.
NuGet is a Visual Studio extension that makes it easy to install and update third-party libraries and tools in Visual Studio.
As a workaround, you could create a library project that does the handling and forwards access to the .dlls and every other project uses this one. Then you only need to update the .dll references in this one wrapper project.