Looking for help for some solutions on switching out the default data provider for the project from MS SQL to mySQL. Eventually with the intent of deploying the solution to Auruora on AWS.
After installing the nuget package I get something along the lines of :
System.TypeLoadException: Method 'Clone' in type 'MySql.Data.EntityFrameworkCore.Infraestructure.MySQLOptionsExtension' from assembly 'MySql.Data.EntityFrameworkCore, Version=6.10.5.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' does not have an implementation.
This lead me to believe that there is no .NET 2.0 Entity Framework Core extention that runs for MySQL. Do I have to rollback to a different version?
For EntityFrameworkCore, it's suggested to use Pomelo.EntityFrameworkCore.MySql.
You may refer to their Getting Started documentation.
A fellow member of the community has kindly summarised the essential steps here:
Put Pomelo.EntityFrameworkCore.MySql into the xxx.EntityFrameworkCore project's .csproj file (see step 2 in the Pomelo getting started guide)
In your xxxDbContextConfigurer class put builder.UseMySql(...) rather than builder.UseSqlServer(...)
Change the connection string found in the appsettings.json file in the xxx.Web.Host project
Related
I have existing app that uses MySQL Server. Some errors I was getting when trying to add a new feature led me to upgrading to 'MySql.Data.EntityFramework 8.0.11'.
error I am getting when on:
public CitiesContext() : base("name=CitiesContext"):
An error occurred creating the configuration section handler for entityFramework: Could not load file or assembly 'EntityFramework, Version=4.6.1.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Under my properties, my target framework is still version 4.6.1.
Is there a 'how to document' somewhere on how to upgrade the EntityFrame work? I know several of the other installed packages were installed while targeting v 4.6.1, so lots of other types of errors using (like hay this was compiled with v 4.6) when trying to compile with a web.congf using
I have installed
PM> Install-Package EntityFramework -Version 6.4.4
Package 'EntityFramework.6.4.4' already exists in project 'Lat34North'
Time Elapsed: 00:00:00.0186347
Please note. This is a hobby for me, not a profession. The app is written using asp.net mvs an first issued in 2018. Do I just need to change the target in the properties and upgrade all the other packages??
Thank you for any help.
When we add the reference, we are able to use the .netstandard libs classes in our .net core console project (in Visual Studio), and it compiles.
When we run the app, it immediately crashes with this error in the output window:
An unhandled exception of type 'System.IO.FileNotFoundException'
occurred in Unknown Module. Could not load file or assembly
'MyNetStandard20Assembly, Version=0.1.0.0, Culture=en-us,
PublicKeyToken=null'. The system cannot find the file specified.
Update / Cause (still looking for reason)
So we use AssemblyInfo files in our projects and in order to make these work with the new project structure we needed to add this to the first PropertyGroup in the .NET Standard project:
<GenerateAssemblyInfo>false</GenerateAssemblyInfo>
That then allows us to have a Properties/AssemblyInfo.cs file in the project, just like a .NET Framework project would allow.
Anyway, when we remove this from the .NET Standard project then the .NET Core project finds the assembly and is happy.
Does anyone know why?
I have a ASP.Net website that connects to a MySQL data base to retrieve data. I have used NuGet to install mysql.data. Doing this added a Bin folder with the sql.data dll in it to my project. It added a reference in my web config file. and it added a packages.config to my project. All of this is expected i assume ? With these resources in place my website works when i run it from visual studio. The problem is when i upload it to a server i get the following error :
Server Error in '/' Application.
Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser Error Message: Could not load file or assembly 'MySql.Data, Version=6.9.8.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' or one of its dependencies. The system cannot find the file specified.
Source Error:
An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed remotely (for security reasons). It could, however, be viewed by browsers running on the local server machine.
Source File: d:\DZHosts\LocalUser\bman262\www.brandonsLoginTest.somee.com\riviera horticulture\web.config Line: 7
Assembly Load Trace: The following information can be helpful to determine why the assembly 'MySql.Data, Version=6.9.8.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' could not be loaded.
WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.6.1069.1
This is saying it cant find the mysql.data reference right ? What am i doing wrong ?
Here are some pictures of my solution in visual studio and my web.config
Solution
Web.config
I am tearing my hair out over this, any help would be VERY appreciated
→ You will have to make sure that the same version is installed on the server where you are deploying your project.
→ If the server to which you are deploying your project is on 64 bit, you can enable 32 bit support for this site's application pool, if your dll requires 32 bit architecture.
For anyone using similar or the same host as me if you have this problem the solution was to convert the project file to an application on the server.
I am using MySQL with dotConnector from Devart. I'm trying to use the code-first with migrations that the library offers. It creates the migrations just fine, but when I try to call Update-Database in the package manager I'm getting this error
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.IO.FileLoadException: Could not load file or assembly 'EntityFramework, Version=4.4.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Digging through my reference list, I'm using EntityFramework 5.0.0.0 and am targeting the v4.5 framework. Why would this be asking for v4.4 of EF?
I set up two connection strings, one using the regular MySQL provider, the other using dotConnector's MySQL provider, it didn't make a difference which one my context used. I've tried removing and re-adding the EF reference.
I'm so lost on this I don't even know what other information to give to help get a constructive answer. So, if there is more information I should give to help get a better answer, please let me know.
I've found more information about dotConnect and it looks like the Migrations portion targets 4.4. Does this mean I need to use EF 4.4? Or can I have both somehow so the migration has what it needs and I can use EF 5.0 everywhere else?
EF 4.4 is .NET 4.0 version of EF 5.0. It looks like something in your project is targeting .NET 4.0 (or is built for .NET 4.0).
I have a web server with MONO 2.10.2 (fast-cgi) on a CentOS 6 box. Running a plain-vanilla MVC 3 site works great. However, when I add MySql.Data, it gives me a not-so-helpful error:
System.IO.FileLoadException: The assembly name is invalid.
My DLLs are in the right place. They're referenced properly. Everything has been done correctly, but Mono still complains that it can't find an assembly without telling me which one. The problem occurs after simply adding a reference to MySql.Data and without changing any code. I've looked through the MySql.Data source solution and the references that it needs seem to exist on the web server.
I understand other people have the same problem. I am happy to debug it myself, but I'm new to Mono and I can't figure out how to get a more-detailed error messages. I've checked Mono's site for instructions to enable more detailed logging, but their docs assume a certain base knowledge about Mono that I do not have.
Is there a way to get more detailed information when Mono fails to load an assembly?
I'm not sure if these details matter, but just in case...
- Mono: 2.10.2 (served via fastcgi-mono-server4)
- MySql: Connector.Net 6.4.4.0 (from the v4 set in the .Net & Mono download)
- Webserver: NGINX 1.0.11
- OS: CentOS 6
If you can get a "test case" that compiles to an application, try:
MONO_LOG_LEVEL="debug" MONO_LOG_MASK="dll" mono my_app.exe
Or just temporarily edit your CGI script so that it sets those two variables. Check the logs - you should see what is not loaded propely.