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C# Entity Framework text SQL query wrapper


C# Entity Framework text SQL query wrapper

By : Arun Verma
Date : November 25 2020, 03:01 PM
this will help The problem is that you're using a method - DbRawSqlQuery which must be told what type to expect, and you're telling it to expect just a string, so it has no idea what to do with more than one returned column.
Maybe it would work if you specified string[] or IEnumerable or something? Alternatively you could define a series of objects with 1, 2, 3, 4 etc values and detect the number of items at runtime and use the correct class... but that seems absurd.
code :


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Entity Framework Code First wrapper or repository?

Entity Framework Code First wrapper or repository?


By : user3606734
Date : March 29 2020, 07:55 AM
Does that help DbSet has interface and you usually implement your own context class derived from DbContext so it can also implement your own interface allowing you to deal with injection without any problem. This is more complex issue. Mocking context doesn't make sense, mocking IDbSet doesn't make sense as well but in the same time mocking any repository or wrapper exposing IQueryable or accepting Expression> passed to Linq-to-entities doesn't make sense either (here is simple example why). So yes repository can handle this but you will have to put more effort into this and you will not use Linq to query database from code calling your repository. If you want your upper layer to use declarative queries (as expected when using repository) you must implement your own specifications. Imho if you don't have EntityFramework.dll in GAC and you will reference your first assembly from new solution you will still add reference to EntityFramework.dll to make sure that it is deployed with your code. Otherwise you are right. Without wrapper you need a reference.
SQLite wrapper 1.0.77 and Entity Framework under .NET 4

SQLite wrapper 1.0.77 and Entity Framework under .NET 4


By : Wacha Cha
Date : March 29 2020, 07:55 AM
This might help you Finally, I understand how to let 1.0.77 System.Data.SQLite assembly to work with Entity Framework and without placing assembly to the GAC.
My first tries to connect SQLite 1.0.77 resulted in:
code :
Assembly.Load("System.Data.SQLite.Linq");
<system.data>
    <DbProviderFactories>
      <remove invariant="System.Data.SQLite"/>
      <add name="SQLite Data Provider" invariant="System.Data.SQLite"
           description=".Net Framework Data Provider for SQLite"
           type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite, Version=1.0.77.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139"/>
    </DbProviderFactories>
  </system.data>
Full text index search for complex query in Entity framework

Full text index search for complex query in Entity framework


By : Ivan R Durai
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Your problem is that you are trying to run fulltext not on from Employees table, but on a Extent2, i.e. SELECT something FROM Employees WHERE ... and it is not full-text indexed. You will have to rewrite your linq query or do it in T-SQL instead of linq.
code :
ListOfEmployees = from cvs in _context.EmployeeCvs.Include(x => x.Employee) 
                  where _Context.Employees.Any(
                        e=>e.FirstName.Contains(SearchQuery.Keyword) 
                        && e.EmployeeID == cvs.EmployeeID
                  ))

 ... etc 
_context.DisableAllFilters();
Get NpgSql Entity Framework query text

Get NpgSql Entity Framework query text


By : Darknuke
Date : March 29 2020, 07:55 AM
I hope this helps . Normally there is no need to configure LoggerFactory explcitly if you are using .AddDbContext or .AddDbContextPool on service registration. EF Core automatically grabs existing logger factory (configured) and uses Debug level log in order to log queries.
You can alternatively enable
code :
builder.EnableSensitiveDataLogging();  // << Enables query parameter/value logging
builder.EnableDetailedErrors(); // << Enables Detailed Errors such as parameter mapping errors
builder.ConfigureWarnings(warnings => 
    warnings.Log(CoreEventId.IncludeIgnoredWarning));  << Includes ignored warnings
"Logging": {
  "LogLevel": {
    ....
    "Microsoft.EntityFrameworkCore.Database.Command": "Information"
  }
}
public static readonly LoggerFactory MyLoggerFactory
    = new LoggerFactory(new[]
    {
        new ConsoleLoggerProvider((category, level)
            => category == DbLoggerCategory.Database.Command.Name
               && level == LogLevel.Information, true)
    });
Is it ok to create wrapper classes for entity framework models?

Is it ok to create wrapper classes for entity framework models?


By : Miguel Fonseca
Date : March 29 2020, 07:55 AM
will help you IMHO,
It is not a good idea untill you want to write some custom logic in the wrappers. I think you are using your model ( or rather i would say DTO objects) for communication purpose.
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