How to count DbSet rows added to in a DbContext
entity-framework-core
Question
Looked high and low but cannot find the syntax to count the number of rows in a [DbContext].[DbSet Entity] by the change status of the row. Specifically, I would like to know how many rows in one entity/table were added and are pending SaveChanges().
Accepted Answer
You can use one of the DbContext.ChangeTracker.Entries method overloads (similar to EF6):
var addedCount = db.ChangeTracker.Entries<YourEntity>()
.Count(e => e.State == EntityState.Added);
Popular Answer
(First answer, so be gentle) I had a similar problem. One approach is to override the context SaveChanges method as proposed here: https://www.exceptionnotfound.net/entity-change-tracking-using-dbcontext-in-entity-framework-6/
But in your situation a special method on your context class might be more appropriate:
public virtual Tuple<int, int> CountChanges()
{
var modified = ChangeTracker.Entries().Where(x => x.State == EntityState.Modified).Count();
var added = ChangeTracker.Entries().Where(x => x.State == EntityState.Added).Count();
return new Tuple<int, int>(modified, added);
}
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