It is EF concept irrespective of Code First or DB First. In Code first we have to manually define the DB Context. In DB first approach this will be created by the EF. In both we have to access the entities using DBContext. As discussed in the above mentioned links DBSet represent the...
dll...what is the error?how to solve??? 'System.Web.UI.WebControls.Literal' does not allow child controls. 'The input is not a valid Base-64 string' ERROR 'type' does not contain a definition for 'length' 'Word.Application' is not defined "aspnet_compiler.exe" exited with code 1 ...
Entity Framework Extensions is nothing but a library that dramatically progresses the Entity Framework performances by using bulk and batch operations. Most people get beneficiaries through Extension, so they often use the library to report performance improvement more than 50x times. We can get the l...
MLContext is the starting point for all ML.NET operations. TheMLContextis used for all aspects of creating and consuming an ML.NET model. It is similar conceptually toDbContextin Entity Framework. varmlContext=newMLContext(); Once you have an instance of anMLContext, you can load and trans...
You can work around this limitation by adding the EDMX file and the generated classes for the entities and the DbContext as linked files to a .NET Core 3.0 or .NET Standard 2.1 project in the same solution. The linked files will look like this in the project file: csproj Copy <ItemGr...
vara = dbContext.Jobs.Include(b=>b.HiringManagerName)//Necessary to populate.ToListAsync(); But because each is thought to be a separate entity, they will be required to expose keys and you'll have to configure foreign keys between each. ...
This is called "pre-convention model configuration", since it configures aspects of the model that are then used by the model building conventions. Such configuration is applied by overriding ConfigureConventions on your DbContext:C# Copy public class SomeDbContext : DbContext { protected override...
The JSON (Newtonsoft.Json, Microsoft.Text.Json) and YAML (YamlDotNet) serializations are supported in EF Core (via EF Core template) and EF6 (via DbContext template): The new template property Serialization Library is added for specifying the library used for serialization The new template prop...
@@ -207,7 +207,7 @@ protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) => (UseSqlite ? optionsBuilder.UseSqlite(@$"DataSource={GetType().Name}.db") // Note that SQL Server 2022 is required. : optionsBuilder.UseSqlServer(@$"Server=(localdb)\mssqllocaldb;Databas...
{vardb = scope.ServiceProvider.GetRequiredService<DbContext>(); } db.Database.Migrate(); } 6. View Components View Components are independent and autonomously go out and build whatever model is needed and render a piece of UI that can be placed into the layout view. In ASP.NET Core deri...