public static void Create(Libro a)
{
using (DBBIBLIOTECAEntities db = new DBBIBLIOTECAEntities())
{
using (var transaction = db.Database.BeginTransaction())
{
try
{
db.Libroes.Add(a);
db.SaveChanges();
transaction.Commit();
}
catch (Exception ex)
{
transaction.Rollback();
throw ex;
}
}
}
}
public static void Delete(int?id)
{
using (DBBIBLIOTECAEntities db = new DBBIBLIOTECAEntities())
{
using (var transaction = db.Database.BeginTransaction())
{
try
{
Libro libro = db.Libroes.Find(id);
db.Entry(libro).State = System.Data.Entity.EntityState.Deleted;
db.SaveChanges();
transaction.Commit();
}
catch (Exception ex)
{
transaction.Rollback();
throw ex;
}
}
}
}
public static void Update(Libro libro)
{
using (DBBIBLIOTECAEntities db = new DBBIBLIOTECAEntities())
{
using (var transaction = db.Database.BeginTransaction())
{
try
{
db.Libroes.Attach(libro);
db.Entry(libro).State = System.Data.Entity.EntityState.Modified;
db.SaveChanges();
transaction.Commit();
}
catch (Exception ex)
{
transaction.Rollback();
throw ex;
}
}
}
}