void client_GetItems_VCompleted(object sender, GetItems_VCompletedEventArgs e)
 {
     foreach (Item item in e.Result)
     {
         ItemTable itemTable = new ItemTable()
         {
             CategoryId = item.CategoryId,
             Name       = item.Name,
             Num        = item.Num,
             Time       = item.Time,
             UserId     = item.UserId,
             Id         = item.ItemId
         };
         db.Items.InsertOnSubmit(itemTable);
     }
     db.SubmitChanges();
     callback2();
 }
 void client_GetItems_VCompleted(object sender, GetItems_VCompletedEventArgs e)
 {
     foreach (Item item in e.Result)
     {
         ItemTable itemTable = new ItemTable()
         {
             CategoryId = item.CategoryId,
             Name = item.Name,
             Num = item.Num,
             Time = item.Time,
             UserId = item.UserId,
             Id = item.ItemId
         };
         db.Items.InsertOnSubmit(itemTable);
     }
     db.SubmitChanges();
     callback2();
 }