Question

I have a table Student. This table has a column ID which is auto-increment. I want to write a stored procedure to add a new student and return the ID. I’m newbie at this.

This is my code. Please check if it’s wrong and fix for me and show me how to code to use it in C#. I used Entity Framework 4.

@Name NVARCHAR(50),
@Birthday DATETIME, 
@ID bigint OUTPUT 
AS 
BEGIN
    SET XACT_ABORT ON 

    BEGIN 
       INSERT INTO [Student](Name, Birthday) VALUES (@Name, @Birthday);  
       SELECT @ID = SCOPE_IDENTITY()
    END
END

Answer 1

It is better you can C# code instead SP when your working with EF4.

Using Entity Framework, this is all done automagically for you.

using (MyEntities context = new MyEntities())
{
    var student =  new Student()
    {
      Name = "some value",
      Birthday = "some Birthday"
    };

    context.Students.AddObject(student);

    context.SaveChanges();

    int ID = student.ID; // You will get here the Auto-Incremented table ID value.
}

Saving in Entity Framework will automatically update the “auto-increment” ID column. You just read it out after the call to .SaveChanges();

EDIT:

Also read this post if you encounter any issues getting the “auto-increment” ID value.