As mentioned in the title I need to modify a very old project. It uses .NET 4 Framework and connects to a local SQLite database. I used Visual Studio 2012 to avoid compatibility problems.
I cannot open the .EDMX file - I get this error:
Error 10027: The XML namespace for the conceptual model's Schema element is not supported on this project's target framework version.
I tried to install Entity Framework 6 because I read that should resolve the problem, but I'm not able to find it anywhere.
How can I fix this problem?
Related
After upgrading EF1.1 to EF2.0 now I'm not able to do migrations.
Error: Startup project 'QilinSystem.Store.Data.csproj' targets
framework '.NETStandard'. This framework is not intended for execution
and may fail to resolve runtime dependencies. If so, specify a
different project using the --s tartup-project option and try again.
How to solve this issue?
EF Core 2.0 Preview 1 requires Visual Studio 15.3 Preview, so you have to install it.
Announcing EF Core 2.0 Preview 1:
Accessing .NET Core tooling in Visual Studio requires Visual Studio
2017 15.3 Preview, Visual Studio for Mac or Visual Studio Code. More
information about this and download links can be found in the .NET
Core 2.0 Preview 1 announcement.
Visual Studio Preview FAQ:
Preview installs next to your stable Visual Studio IDE, allowing you
to use either independently.
I get the following error trying to add a new entity model. Any ideas on how to troubleshoot or fix this?
An error occurred loading the entity data model tools package. failed
to load entity data model tools package. the result is -2147024894
Visual Studio 2015 Update 1
v14.0.24720.00
Entity Framework Nuget Package
v6.1.3
Microsoft .net 4.6.0
UPDATE
I tried installing this, it worked once and then after rebooting a couple days later no longer fixed the issue. It's back:
I was able to fix this by downloading the entity framework 6.x t4 templates and installing them from this: https://visualstudiogallery.msdn.microsoft.com/18a7db90-6705-4d19-9dd1-0a6c23d0751f?SRC=VSIDE
I was able to get around this error by changing the framework from version 4.x to 4.5 on my project and then restarting visual studio. It took some tinkering but it appears this occurs because the Visual Studio 2015 Entity Model Package wizard is dependent on something in the 4.5 framework.
I am completely unaware of EF, but got an EF project from a candidate. Couldn't open it in Visual Studio 2010 and want at least to run it in IIS to review if neccessary functionality has been done.
How to install it in IIS ?
Entity Framework 6 is not supported by VS 2010, please check that this is not your problem.
Ensure your IIS server has .NET 4 for EF 5 and below, or .NET 4.5 if using EF 6
You will probably also need to edit the supplied connection string to point at a valid database server.
I have installed EntityFramework 6.01 and have added a reference to my project. I closed Visual Studio 2012 and I then installed EF Power Tools Beta 4.
I re-opened Visual Studio 2012 and right-clicked my project containing dbContext. No entry appears in the context menu for Entity Framework. No error messages occurred during installation.
Are there additional pre-requisites to using EF Power Tools?
I think I have discovered the solution. My company uses VB.net as the standard development language. As a test, I started a C# project. Entity Framework Power Tools are fully present in the C# project. It appears that Entity Framework Power Tools are not yet available in VB.net projects.
Try right clicking on the project. I just looked at the beta 4 description and it does not reference EF 6. But the reverse engineer classes from database should show up with a right click on the project, indicating that at least the power tools installed correctly. These are the only comparability issues I could find:
Generate Views won’t work with prerelease versions of EF6.
It will, however, work with the RTM version when it’s released.
View Entity Data Model won’t work with EF6 on Visual Studio 2010.
Beta 4 updates the Power Tools to work with Entity Framework 6 and Visual Studio 2013. The following issues have also been fixed in this release.
Power Tools don't work when project is under a solution folder
Power Tools stop working when EF.dll is loaded into VS
Specific info found on the ado.net blog on msdn
I installed a lot of ado.net entity framework versions and tools. one of them was this one: http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=26660
Now there are a lot of problems while trying to add a new entity data model, and also can't use any code generation tools such as dbcontext code generator.
What I want to know is how to remove all of these ef versions and reset my Visual studio 10.
Note, I repaired my vs, and reinstalled the SP1 but with no hope, the same errors are there.
here are 2 screen shots that may let you help me better:
installed items in my VS:
error appear after trying to add a new entity data model:
The uninstallation procedure of EF June 2011 CTP is described in this article. As you see in your linked download page there is red text in instructions describing issues with CTP. That CTP should have never been installed on your main development (production) machine because it breaks existing VS functionalities. The instructions directly says that it should be installed in non-production environment (for example virtual machine).