How to access dbcontext in Custom Action Filter OnActionExecuting How to access Enum value in controller from dropdownList in View How to access local file stored under another project, under the same solution? How to access session variables in Web API Controller how to access the model in ...
usingSystem.Data.Entity;//...publicclassMyDbContext : DbContext {publicMyDbContext(stringconnectionString) :base(connectionString) { }publicDbSet<Employee> Employees {get;set; }publicDbSet<Task> Tasks {get;set; } } Note that theMyDBContextclass should implement a constructor that takes the...
DbContext constructor should called and resulting instance shoudl returned.How to implement this ? Is there some NuGet package or framework for this ?As far as I can tell, your requirement has a major design bug. How will the code base know about the dynamically created entities?
Use the in-memory db context which should take care of bootstrapping all the sets for you. You no longer need to mock out the DbSet on your context but if you want to return data from a service for example, you can simply return the actual set data of the in-memory context. Db...
public DbSet<Producer> Producers { get; set; } public DbSet<Product> Products { get; set; } } When I am running add-migration command I am getting an error as Unable to create an object of type 'AppDbContext'. For the different patterns supported at design time, seehttps:/...
What I need to do is I want to create entity for these resultsets, but I dont want framework to create tables for these entities in database. Note: Reason for doing this is, resultset which is returned by sp doesnt have a primary key, so suppose we can have a valid table created ...
//create database if no exsisted one this.Database.EnsureCreated(); } public DbSet<Product> Products { get; set; } } IDesignTimeDbContextFactory<TDbContext> 帮助我们做Migration时用到。 我们需要在有DbContext的project内添加Microsoft.EntityFrameworkCore.Design, project file csproj...
Create the data context in ASP.NET Core Create a new .cs file named named EFMigrationsDemoDBContext.cs in the EFMigrationsDemo.Data project and enter the following code in there. using Microsoft.EntityFrameworkCore; namespace EFMigrationsDemo.Data ...
Because DbContext objects may be costly to create and dispose of, EF Core offers a mechanism for pooling them. By pooling, DbContext objects are created once, then reused when needed. Using a DbContext pool in EF Core can improve performance by reducing the overhead involved in building and...
Whennotusing a retrying execution strategy you can wrap multiple operations in a single transaction....