private static void Main(string[] args)
{
using (var context = new AdsEntities())
{
// 01.Show Data from Related Tables
// 98 requests
var ads = context.Ads;
foreach (var ad in ads)
{
Console.WriteLine("{0} {1} {2} {3} {4}",
ad.Title, ad.AdStatus.Status,
(ad.CategoryId != null) ? ad.Category.Name : "no data",
(ad.TownId != null) ? ad.Town.Name : "no data",
ad.AspNetUser.Name);
}
// 4 requests
var otherAds = context.Ads.Include(a => a.AdStatus)
.Include(a => a.Category).Include(a => a.Town)
.Include(a => a.AspNetUser);
foreach (var ad in otherAds)
{
Console.WriteLine("{0} {1} {2} {3} {4}",
ad.Title, ad.AdStatus.Status,
(ad.CategoryId != null) ? ad.Category.Name : "no data",
(ad.TownId != null) ? ad.Town.Name : "no data",
ad.AspNetUser.Name);
}
// 02.Play with ToList()
Console.WriteLine();
// 80 requests
var allAds = context.Ads
.ToList()
.Where(a => a.AdStatus.Status.Equals("Published"))
.OrderBy(a => a.Date)
.SelectMany(a => new[]
{
a.Title,
(a.CategoryId != null) ? a.Category.Name : "no category",
(a.TownId != null) ? a.Town.Name : "no town"
})
.ToList();
for (int i = 0; i < allAds.Count; i += 3)
{
Console.WriteLine("{0} {1} {2}", allAds[i], allAds[i + 1], allAds[i + 2]);
}
// 4 requests
var properWaysAds = context.Ads
.Where(a => a.AdStatus.Status.Equals("Published"))
.OrderBy(a => a.Date)
.Include(a => a.Category)
.Include(a => a.Town).ToList();
properWaysAds.ForEach(a =>
{
Console.WriteLine("{0} {1} {2}",
a.Title,
(a.CategoryId != null) ? a.Category.Name : "no category",
(a.TownId != null) ? a.Town.Name : "no town");
});
// 03.Select Everything vs. Select Certain Columns
Console.WriteLine();
// 4 requests
var start = DateTime.Now;
var allData = context.Ads;
foreach (var ad in allData.Take(4))
{
Console.WriteLine("{0}", ad.Title);
}
Console.WriteLine("{0}", DateTime.Now - start);
Console.WriteLine();
// 4 requests
start = DateTime.Now;
var selectedData = context.Ads.Select(a => a.Title);
foreach (var ad in selectedData.Take(4))
{
Console.WriteLine(ad);
}
Console.WriteLine("{0}", DateTime.Now - start);
Console.WriteLine();
}
}
private static void Main(string[] args)
{
using (var context = new AdsEntities())
{
// 01.Show Data from Related Tables
// 98 requests
var ads = context.Ads;
foreach (var ad in ads)
{
Console.WriteLine("{0} {1} {2} {3} {4}",
ad.Title, ad.AdStatus.Status,
(ad.CategoryId != null) ? ad.Category.Name : "no data",
(ad.TownId != null) ? ad.Town.Name : "no data",
ad.AspNetUser.Name);
}
// 4 requests
var otherAds = context.Ads.Include(a => a.AdStatus)
.Include(a => a.Category).Include(a => a.Town)
.Include(a => a.AspNetUser);
foreach (var ad in otherAds)
{
Console.WriteLine("{0} {1} {2} {3} {4}",
ad.Title, ad.AdStatus.Status,
(ad.CategoryId != null) ? ad.Category.Name : "no data",
(ad.TownId != null) ? ad.Town.Name : "no data",
ad.AspNetUser.Name);
}
// 02.Play with ToList()
Console.WriteLine();
// 80 requests
var allAds = context.Ads
.ToList()
.Where(a => a.AdStatus.Status.Equals("Published"))
.OrderBy(a => a.Date)
.SelectMany(a => new[]
{
a.Title,
(a.CategoryId != null) ? a.Category.Name : "no category",
(a.TownId != null) ? a.Town.Name : "no town"
})
.ToList();
for (int i = 0; i < allAds.Count; i += 3)
{
Console.WriteLine("{0} {1} {2}", allAds[i], allAds[i + 1], allAds[i + 2]);
}
// 4 requests
var properWaysAds = context.Ads
.Where(a => a.AdStatus.Status.Equals("Published"))
.OrderBy(a => a.Date)
.Include(a => a.Category)
.Include(a => a.Town).ToList();
properWaysAds.ForEach(a =>
{
Console.WriteLine("{0} {1} {2}",
a.Title,
(a.CategoryId != null) ? a.Category.Name : "no category",
(a.TownId != null) ? a.Town.Name : "no town");
});
// 03.Select Everything vs. Select Certain Columns
Console.WriteLine();
// 4 requests
var start = DateTime.Now;
var allData = context.Ads;
foreach (var ad in allData.Take(4))
{
Console.WriteLine("{0}", ad.Title);
}
Console.WriteLine("{0}", DateTime.Now - start);
Console.WriteLine();
// 4 requests
start = DateTime.Now;
var selectedData = context.Ads.Select(a => a.Title);
foreach (var ad in selectedData.Take(4))
{
Console.WriteLine(ad);
}
Console.WriteLine("{0}", DateTime.Now - start);
Console.WriteLine();
}
}
