C# EF6 Code First binary(16) column

Under EF4.3, in the Code First Approach, set decimal(16, 3) for a column.

The ...DataType... Attribute is a Validation Attribute. You need to do that using the ModelBuilder....public class MyContext : DbContext { public DbSet<MyClass> MyClass; protected override void OnModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Entity<MyClass>().Property(x => x.SnachCount).HasPrecision(16, 3); m...

Entity Framework Code First Using One column as Primary Key and another as Auto Increment Column

You can also do this with Data Annotations:...public class Sale { [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int Id { get; set; } [Key] public string TrNo { get; set; } public DateTime Date { get; set; } public int CustomerID { get; set; } public ObservableCollection<SaleDetail> SaleDetails { get; se...

How to create two navigation properties to one model (EF6 Code First)

try this, if you use migrations. Migrations are not smart everytime, you should interreput the code sometimes....public class Match { public Guid Id { get; set; } public Int32 TeamHomeScore { get; set; } public Int32 TeamAwayScore { get; set; } public Guid TeamHomeId { get; set; } // I want these properties to be foreign keys p...

EF6 code first add migration - where is the 'snapshot of the current code' stored?

When I add a migration for my EF6 code first project, I get this message..."The Designer Code for this migration file includes a snapshot of your current Code First model. This snapshot is used to calculate the changes to your model when you scaffold the next migration. If you make additional changes to your model that you want to include in th...

EF6 Code First - Configure One-to-One relationship with unmatched foreign keys

I'm using Code First to define the schema of an existing database. The problem I'm having is that they key names in the tables don't quite align. This works fine with one-to-many relationships because I can use the ...HasForeignKey()... method, but there does't seem to be an equivalent for one-to-one relationships. My table definitions are:...na...

Solutions with one EF6 model (db first) and one code first

I have a solution that has multiple databases. We are using EF6....We have one Project that is EF6 (code first), and one project that is EF6 DB first....var arkleModelDbFist = new Arkle.DAL.EF.ArkleEntities(); var CustomerOld= new Arkle.DAL.EF.Customer(); arkleModelDbFist.Customers.Add(CustomerOld); // Errors on this line arkleModelDbFist.SaveChang...

Cannot generate C# class from PostgreSQL view using Npgsql + EF6 code first

I am trying to use entity framework code first method to connect to PostgreSQL database, and when I use entity data model wizard in visual studio to generate C# class from database, it can generate classes for each table in database successfully, but the views in database cannot be generated. ...(source: ...linearbench.com...)...(source: ...linear...

EF6 Oracle default value for a column in code first migration

I am trying to write a migration that sets ...Default Value... for a NUMBER column in my ...Oracle... database using ...EntityFramework 6.... Here is my first try that didn't set the default value:... public override void Up() { AddColumn("MTA.PLAN_SHEETS", "QUANTITY_CHANGED", c => c.Decimal(nullable: true, precision: 3, scale: 0, de...

EntityFramework database first - type mapping - map binary(8) from SQL to int in C#

Inside SQL I have table that have primary key as binary(8). When I add that table to my model using ...Update Model from Database... I can see that this column has type=...Binary...and in C# I get that column as ...byte[].......Can I map that column to int?...I know I can create a view with ...CAST... in SQL:...SELECT Client_Id, CAST(Client...

How to map Table Valued Functions in EF6 Code First with different column names?

It is possible to map a table valued functions in EF6 without edmx? The problem is that the columns in the database are named differently than in the application....My application as a simplified example....Database...The table ...user... on SQL Server 2016:...User Id (int, Identity, PK) Name (nvarchar(255) ...The table valued function ...GetUser...