For one of my projects i am using asp.net mvc core and in this web application, for using EntityFramework i am not able to download 'Microsoft.Data.Entity' from nuget.
you have to install 2 package using the package manager
Microsoft.EntityFrameworkCore.SqlServer
Then in your code, require it:
using Microsoft.EntityFrameworkCore;
The package you need for EF Core is:
Microsoft.EntityFrameworkCore.SqlServer
It was due to ASP.Net Core framework was not installed correctly, i tried it in Visual Studio 2017 and guess what it worked perfectly.
Related
I'm having issues when creating an API Controller in .NET 5.0 with Entity Framework Core.
Here's what I'm doing:
I'm using .NET 5.0
Installed the Entity Framework Core packages and all 3 have the version 5.0
The model and DataContext classes have already been created and using them had already created a table in the database earlier
However when I right-click on the API project, click on Controller > Select "API Controller with actions, using Entity Framework" > Select "Model Class" & "DataContext class" > Enter the name of the controller
I keep getting the error
There was an error running the selected code generator: Package restore failed. Rolling back the changes for API
Troubleshooting done:
Cleared the NuGet Cache in Tools > Options > NuGet Package Manager > Clear All NuGet Cache(s)
Made sure that the Entity Framework Core packages and the .net version are the same in the .csproj
What am I missing here that is causing the issue?
If you have installed the latest version of Microsoft.VisualStudio.Web.CodeGeneration.Design package, you probably got version 5.0.2. That package cannot generate code based on Entity Framework Core packages of version 5.0.0.
From my experience - to generate EF Core based code, the version of your Design package should be equal to or less than the version of your EF Core packages. So, you need to either upgrade the EF Core packages, or install the version 5.0.0 of the Design package.
EDIT:
I faced the same issue and it was resolved after upgrading the EF Core packages, which is 5.0.4 currently, and installing the latest Design package, which is 5.0.2 currently.
In my case to generate EF core based code, i need to installed version 5.0.13 of Microsoft.EntityFrameworkCore and version 5.0.12 of Microsoft.EntityFrameworkCore.SqlServer and Microsoft.EntityFrameworkCore.Tools
and version 5.0.2 of Microsoft.VisualStudio.Web.CodeGeneration.Design
Note:- Make sure to clear Nuget Cache
I have created .net standard library project and I have created nuget package for this library, Now I need to install this package in both application .Net Core and .Net Framework4.5. Working fine in .Net Core but while installing .Net framework project it was showing below exception.
You are trying to install this package into a project that targets '.NETFramework,Version=v4.5.2', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.
Please let me know the right approach to resolve this.
The library that you have created targets .NET Standard 2.0, as stated in your tags. .NET Framework 4.5.2 does only implement .NET Standard up to version 1.2, that is why the assemblies are not compatible.
You should change your library to a .NET Standard version that is implemented by both .NET Core and .NET Framework or upgrade your .NET Framework version accordingly.
You can find the version mappings here, credits to #Matt Ward for providing the source.
I have this situation where I want to start using EF6 for new projects, because EF6 is the latest version, but I still want to be able the work on my old projects that use EF5.
To use EF6 in VS2012, I need to install the Entity Framework 6 Tools, but the problem is that install instructions say that "When you install the RC1 tooling it will replace the EF Designer that was included in Visual Studio 2012"
So to my understating, VS2012 will be unable to work with the old projects that use EF5?
The EF6 desing tools support both EF5 and EF6
I recently did a portion of the MVCMusicStore tutorial using MVC3 as directed. However, being that I have Visual Studio 2012, I'm attempting to use EF in an MVC4 application. I was attempting to add the using System.Data.Entity; directive and it was not found.
I know that I can probably just add the reference to it. But I'd like to know why it's not already available for my MVC4 project. Is there a new method of creating an Entity Framework supported application using MVC4?
Entity Framework is now being distributed separately from Visual Studio through the NuGet package management system as of Visual Studio 2012. The reason for this is to decouple EF from the release of VS, so it can be released on a different time schedule. They have also recently released EF as an open source framework, so it's being removed as a project from the .net framework release.
You have to use NuGet to install Entity Framework in your project. Right click on the project and choose Manage Nuget Packages. Make sure you select the Online tab in the dialog that opens, then in the search type Entity Framework and click Install. You will then be able to add the using statement.
I'm working on a project with Entity Framework in Webmatrix 2 RC, so I need to use Entity Framework v.5 RC because of conflicts between previous versions and .NET Framework 4.5.
The two ways I know to install NuGet packages in Webmatrix are from the NuGet Gallery on the Webmatrix ribbon and from the package manager in ASP.NET Web Pages Administration: either solution proposes only Entity Framework v4.3.1.
I have downloaded Entity Framework v.5 RC with the Package Manager Console of Visual Web Developer and copied the EntityFramework.dll into the bin folder of my project.
This solution works but I wonder if exists a way to install a not recommended NuGet package that doesn't require the use of Visual Web Developer.
You can use nuget.exe or NuGet Package Explorer, both are standalone and lightweight. You'll still have to manually add references to the files though.