public static void Main()
{
Database.SetInitializer(new MigrateDatabaseToLatestVersion<NewsEntity, Configuration>());
var db = new NewsEntity();
var news = db.News.ToList();
news.ForEach(n => Console.WriteLine(n.Content));
}
static void Main()
{
Database.SetInitializer(new MigrateDatabaseToLatestVersion<NewsEntity, Configuration>());
var firstUserContext = new NewsEntity();
var secondUserContext = new NewsEntity();
var lastId = firstUserContext.News.Count();
var end = true;
var isFirstSave = false;
Console.WriteLine("First user");
PrintNewsWithId(lastId);
Console.Write("Enter the new content: ");
var newContent = Console.ReadLine();
UpdateNewsById(firstUserContext, lastId, newContent);
Console.WriteLine("Changes successfully saved in the DB.");
Console.WriteLine();
Console.WriteLine("Second user");
PrintNewsWithId(lastId);
do
{
Console.Write("Enter the new content: ");
newContent = Console.ReadLine();
UpdateNewsById(secondUserContext, lastId, newContent);
if (!isFirstSave)
{
firstUserContext.SaveChanges();
isFirstSave = true;
}
try
{
secondUserContext.SaveChanges();
end = false;
Console.WriteLine("Changes successfully saved in the DB.");
}
catch (DbUpdateConcurrencyException)
{
Console.Write("Conflict! Content from DB: ");
PrintNewsWithId(lastId);
end = true;
firstUserContext.Dispose();
secondUserContext.Dispose();
secondUserContext = new NewsEntity();
}
} while (end);
}
static void UpdateNewsById(NewsEntity dbContext, int newsId, string newContent)
{
var updatedNews = dbContext.News.Find(newsId);
updatedNews.Content = newContent;
}
static void PrintNewsWithId(int newsId)
{
var contex = new NewsEntity();
var newsContent = contex.News.Find(newsId).Content;
Console.WriteLine(newsContent);
}
