Remove Identity Insert from table Code First Entity Framework 6

Entity Framework error: Cannot insert explicit value for identity column in table

Do this:...using System.ComponentModel.DataAnnotations.Schema; [DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)] public decimal Identity_Col { get; set; } ...These lines of code are added to the Identity column in the Entity Framework class file.

Entity Framework Code First: One-to-Many and Many-to-Many relationships to same table

I would always advise using fluent API when using the Code First Approach rather than DataAnnotations, which perform some conversions automatically....You can then determine the precise configuration that you created....Here is what I would use if I were you:...public class EventMap : EntityTypeConfiguration<Event> { public EventMap() { ...

Entity Framework 6 multiple table to one foreign key relationship code first

I experienced the same issue and started off using abstract classes rather than interfaces. My table 3 had two navigation properties: a public virtual Table 1 and a public virtual Table 2, and EF had recently added these new foreign key columns. This was a problem, so I combined the two navigation properties into a single navigation property....pub...

Entity Framework - How to Insert to table with foreign keys without retrieving foreign table rows first

Foreign key properties can simply be added to the navigation properties and set using the existing ids. By doing this, you will avoid having to search the database for related items only to set the relationship.

how to (INSERT) data in this table in entity framework code first?

My issue is resolved!... I tried to enter a list of string values even though I had only defined a single string value for the foreign key....db.UsersInRoles.Add(new UsersInRoles {FKUserName="User1", FKRoleName="Role1", ApplicationName="PSCMS"}); db.SaveChanges();

Entity Framework Code First Fluent API configuration for one to one identifying relationship

The main key of the dependent entity must also be a foreign key to the principal entity in order for EF to execute one-to-one relationships. As a result, the dependent's PK is inherently limited to current principle PK values....Consequently, slightly adjusted using your classes:...public class Customer { public int CustomerId { get; private se...

Entity Framework 6 Code first One-to-Many relation in 3rd level child tables

It was solved by me....ApplicationUser... and ...Customer... a table is...one-to one... the data is identical in both tables....PK... (...String Id... in ...ApplicationUser... and ...String UserId... in ...Customer... ). We can rationally consider these two tables to be one table with...PK... of a kind...string... . The...Contact... table's pa...

One to many relationship with junction table using Entity Framework code first

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Entity Framework 6 Code First int Identity column value is zero for first row

Your concrete migration class should "somewhat" resemble the examples below:...public class 201707132034165_MyAwesomeDbInitial : DbMigration { #region <Methods> public override void Up() { CreateTable( "dbo.HasOverdrive", c => new { HasOverdriveId = c.Int(nullable: false, iden...

Entity framework one foreign key toward two tables - code first

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