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.
Related
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
Creating a web application as ASP.NET Core Web Applicaiton (.NET Framework) creates with most of the references as 1.0.0-rc2-final.
I am using the RTM version of VS 2015 Update 3. Hoping the references to be full version rather than rc2-final.
Are the templates updated properly? Do I need an update for the tools? If needed, where will I get it?
Thanks
ASP.Net Core tooling isn't included in Update 3 so apart from Update 3 you also need to install Web tooling. Go to: https://www.microsoft.com/net/download and download ".NET Core Tooling Preview 2 for Visual Studio 2015" (at the bottom of the page).
Probably going to have to update the project with nuget or by hand this assumes you have installed the SDK Core Preview2 Tooling located here.
NET Core 1.0 for Visual Studio
NB: while the framework has RTM'd the tooling is still in preview status since they are still working on it, hence Preview2 status.
if you have a Global.json file I would also suggest clearing out the entry that says "sdk": {}
I'll need to use ADO.NET EF for my next project so I started a tutorial but ended up with installing Entity Framework while my Project was open through Project -> Manage NuGet Packages and then decided to walk through the tutorial using another project so I closed the current one and on the next day I created new Console Project for the needs of this tutorial. However when I tried to add using System.Data.Entity; to my Program.cs it didn't recognize the Entity so I had to install again Entity Framework from NuGet which seems kind of strange to me.
Is this how it should be - installing the Entity Framework for every project that will use it or I can install it once and then add it as reference where needed or something like that like many other packages in .NET?
No, you shouldn't need to install Entity Framework for each project. Did you try adding a reference to the missing DLL? To do this, right-click your project in Solution Explorer and select Add Reference from the menu. You should be able to select System.Data.Entity from the .NET tab:
I created a project in the express edition of VS 2012, it was MVC4 using EF5 Model First with enums. I get this error when trying to run the same project now in VS 2010.
Error 1 Error 5: The element 'Schema' in namespace 'http://schemas.microsoft.com/ado/2008/09/edm' has invalid child element 'EnumType' in namespace 'http://schemas.microsoft.com/ado/2008/09/edm'. List of possible elements expected: 'Using, Association, ComplexType, EntityType, Function, EntityContainer' in namespace 'http://schemas.microsoft.com/ado/2008/09/edm' as well as any element in namespace '##other'.
It seems VS2010 does not support enums? But I have checked the EF version being used and it is still v5... so I am confused.
Any ideas?
Entity framework will reference 4.4 when you're targeting .NET 4.0 with vs 2010.
The 4.4 comes from the assembly version of EntityFramework.dll when
you install EntityFramework 5.0 into a project that targets .NET
Framework 4.0. This is merely a side effect of how the runtime loads
and binds to assemblies, and in no way reflects the version of the
product.
for more information check There is no such thing as Entity Framework 4.4
Compatibility
Some features are only available when writing an application that
targets .NET 4.5. This includes enum support, spatial data types,
table-valued functions and the performance improvements. If you are
targeting .NET 4.0 you still get all the bug fixes and other minor
improvements.
For more information check EF5 Release under compatibility section.
I hope this will help to you.
In VS2010, I cannot find the template ADO.NET Entity Data Model from the Data section.
I was doing:
create a silverlight(version 4th) project with a WebSite
right click the web project, Add -> New Item -> Data Section(actually, I tried every one)
But I cannot find it!! It's weird!
Then,
I tried to reset my VS template, it didn't work
Tried to re-install VS2010, and I got the "Successful" message. also I am sure that the ADO.NET Entity Framework has been installed appropriately.
So, is there anything else I can do? can I just install this template to VS?
i believe you can add a ADO.NET Entity Data Model in a windows class library
and reference that library where it is required. but you cannot add the data model in a silverlight library.
Update:
in that case, i presuming the website is atleast targeting version 3.5 of the framework
for vs2010, you can check that the required template is available at the locations below
'%programfiles%\Microsoft Visual Studio 10.0\Common7\IDE\ItemTemplates\CSharp\Data\1033\AdoNetEntityDataModelCSharp.zip'
'%programfiles%\Microsoft Visual Studio 10.0\Common7\IDE\ItemTemplates\VisualBasic\Data\1033\AdoNetEntityDataModelVB.zip'
'%programfiles%\Microsoft Visual Studio 10.0\Common7\IDE\ItemTemplates\Web\CSharp\1033\AdoNetEntityDataModelCSharp_ASPNET.zip'
'%programfiles%\Microsoft Visual Studio 10.0\Common7\IDE\ItemTemplates\Web\VisualBasic\1033\AdoNetEntityDataModelVB_ASPNET.zip'
(in a x64 environment use 'Program Files (x86)' for %programfiles%)
hope that helps.
-ryan