public void Update(Seller seller)
{
using (var context = DataContext.CreateNew())
{
context.Database.Log = Console.WriteLine;
foreach (var item in seller.Properties)
{
if(context.SellerProperties.FirstOrDefault(x=>x.SellerId == item.SellerId) !=null)
{
context.SellerProperties.Attach(item);
context.Entry(item).State = EntityState.Modified;
}
else
{
context.SellerProperties.Add(item);
context.Entry(item).State = EntityState.Added;
}
}
context.Sellers.Attach(seller);
context.Entry(seller).State = EntityState.Modified;
context.SaveChangesAsync();
}
}
public void Remove(Seller seller)
{
using (var context = DataContext.CreateNew())
{
context.Sellers.Remove(seller);
context.SaveChangesAsync();
}
}
public int Add(Seller seller)
{
using (var context = DataContext.CreateNew())
{
context.Database.Log = Console.WriteLine;
context.Sellers.Add(seller);
context.SaveChanges();
return seller.SellerId;
}
}
public void InsertOrUpdate(Seller seller)
{
using (var context = DataContext.CreateNew())
{
if (seller.SellerId == default(int))
{
context.Sellers.Add(seller);
}
else
{
UpdateSeller(seller, context);
}
context.SaveChanges();
}
}
static void Main(string[] args)
{
var s = new SellerRepository();
var seller = new Seller { Name = "Flipkart", Url = "http://flipkart.com" };
seller.Properties = new List<SellerProperty>
{
new SellerProperty{Name = "Flipkart Shopping Type new ", Value = "E Commerse site"},
new SellerProperty{Name = "Flipkart Address new asdfasd", Value = "Our favorite address"}
};
s.InsertOrUpdate(seller);
//var a = s.All;
//s.Delete(a.FirstOrDefault().SellerId);
}
private void PrepareObjectGraph(Seller seller, DataContext context)
{
context.Sellers.Add(seller);
}
private void MarkSellerAsModified(Seller seller, DataContext context)
{
context.Entry(seller).State = EntityState.Modified;
}
private void MarkAllPropertiesAsNew(Seller seller, DataContext context)
{
seller.Properties.ForEach(x => context.Entry(x).State = EntityState.Added);
}
private void DeleteExistingProperties(Seller seller, DataContext context)
{
context.Database.ExecuteSqlCommand("DELETE from SellerProperties where SellerId = " + seller.SellerId);
}
private void UpdateSeller(Seller seller, DataContext context)
{
PrepareObjectGraph(seller, context);
MarkSellerAsModified(seller, context);
DeleteExistingProperties(seller, context);
MarkAllPropertiesAsNew(seller, context);
}
