Question

Here is the two important bits. I have a taxpayerID that comes from the Current users profile, but then I want to move that value from the ASPNETDB database into my actual transaction database, so I know the value, but this code fails. It will insert the first time and fail on every following save,

{“A duplicate value cannot be inserted into a unique index. [ Table name = dr405,Constraint name = PK_dr405_0000000000000072 ]”}

I’ve tried deleting the database to clear out any cobwebs and that did not seem to help.

[Key]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public String TaxPayerID { get; set; }
public DateTime CreateDate { get; set; }

---

public void Save(DR405DBContext context, dr405 obj) 
{
    if (obj.CreateDate == null)
    {
        obj.CreateDate = DateTime.Now;
    }
    obj.ModDate = DateTime.Now;

    context.Entry(obj).State = obj.TaxPayerID == null ? EntityState.Added : EntityState.Modified;
    obj.TaxPayerID = Tangible.Profiles.DR405Profile.CurrentUser.TaxPayerID;
    context.SaveChanges();
}

Answer 1

I really appreciate everyones responses. I solved the issue by using third example in the accepted answer is the trick. stackoverflow.com/questions/5557829/…

I was having problems due to a general lack of knowledge about EF4 and the way it tracks changes.