EnitityFramework is very slow to compare strings because create a nvarchar sqlparameter instead of varchar

Question

I have this sample query:

context.BarcodeTipiDoc.AsQueryable().Where(d => d.Barcode.CompareTo(minBarcode) > 0);
         


        

Answer 1

You can define the column as non-unicode in the context's OnModelCreating override:

modelBuilder.Entity().Property(x => x.Barcode).IsUnicode(false);