public async Task <IActionResult> IndexAsync(CancellationToken cancellationToken = default)
{
await Context.Database.EnsureCreatedAsync(cancellationToken);
await Context.GenerateDataAsync(cancellationToken);
int count = await Context.Customers.AsNoTracking().CountAsyncEF(cancellationToken);
int futureCount = Context.Customers.AsNoTracking().Future().Count();
_logger.LogInformation($"Future Customer Count: {futureCount}");
QueryFutureValue <Customer> futureFirstCustomer = Context.Customers.AsNoTracking()
.Where(x => x.IsActive).DeferredFirstOrDefault().FutureValue();
QueryFutureValue <int> futureCustomerCount = Context.Customers.AsNoTracking()
.Where(x => x.IsActive).DeferredCount().FutureValue();
Customer firstCustomer = futureFirstCustomer.Value;
int countCustomer = futureCustomerCount.Value;
QueryFutureValue <int> futureMaxPrice =
Context.Products.AsNoTracking().DeferredMax(x => x.Prices).FutureValue <int>();
QueryFutureValue <int> futureMinPrice =
Context.Products.AsNoTracking().DeferredMin(x => x.Prices).FutureValue <int>();
int maxPrice = futureMaxPrice.Value;
int minPrice = futureMinPrice.Value;
_logger.LogInformation($"Max Price: {maxPrice}");
_logger.LogInformation($"Min Price: {minPrice}");
IEnumerable <Product> resultPeopleActive =
await Context.Products.AsNoTracking()
.Where(c => c.IsActive)
.ToListAsyncEF(cancellationToken)
;
IEnumerable <Product> resultPeopleNonActive =
await Context.Products.AsNoTracking()
.Where(c => !c.IsActive)
.ToListAsyncEF(cancellationToken)
;
QueryFutureEnumerable <Product> resultPeopleActiveWithFuture =
Context.Products.AsNoTracking()
.Where(c => c.IsActive)
.Future()
;
QueryFutureEnumerable <Product> resultPeopleNonActiveWithFuture =
Context.Products.AsNoTracking()
.Where(c => !c.IsActive)
.Future()
;
IEnumerable <Product> resultPeopleActiveWith =
await resultPeopleActiveWithFuture.ToListAsync(cancellationToken);
IEnumerable <Product> resultPeopleNonActiveWith =
await resultPeopleNonActiveWithFuture.ToListAsync(cancellationToken);
if (resultPeopleActive == resultPeopleActiveWith &&
resultPeopleNonActive == resultPeopleNonActiveWith)
{
_logger.LogInformation("Results are the same .. !!!!");
}
IQueryable <Product> query = Context.Products.AsNoTracking().Where(c => c.IsActive);
var pagedQueryable = await query
.OrderBy(p => p.ProductId)
.Skip(1).Take(4)
.Select(p => new
{
TotalAsync = query.CountAsyncEF(cancellationToken),
Item = p
})
.ToListAsyncEF(cancellationToken)
;
int totalQuery = await pagedQueryable.FirstOrDefault().TotalAsync;
IEnumerable <Product> items = pagedQueryable.Select(p => p.Item).ToList();
var page = await query
.OrderBy(p => p.Name)
.Select(p => p)
.Skip(1).Take(4)
.GroupBy(p => new { TotalAsync = query.CountAsyncEF(cancellationToken) })
.FirstOrDefaultAsyncEF(cancellationToken)
;
int total = await page.Key.TotalAsync;
IEnumerable <Product> people = page.Select(p => p);
IEnumerable <ProductResult> results = await query
.OrderBy(p => p.Name)
.Skip(1).Take(4)
.Select(p => new ProductResult(p, query.Count()))
.ToListAsyncEF(cancellationToken)
;
int totalCount = results.FirstOrDefault().TotalCount;
IEnumerable <ProductResult> peopleResult = results.Select(p => p).ToList();
IQueryable <Product> queryAsQueryable = Context.Products.AsNoTracking().AsQueryable();
Task <List <Product> > resultsTask =
query.OrderBy(p => p.ProductId).Skip(1).Take(4).ToListAsyncEF(cancellationToken);
Task <int> countTask = query.CountAsyncEF(cancellationToken);
await Task.WhenAll(resultsTask, countTask);
int TotaslCount = await countTask;
IEnumerable <Product> Data = await resultsTask;
IQueryable <Customer> baseQuery = Context.Customers.AsNoTracking().Where(c => c.IsActive);
var customerResult = await baseQuery
.Select(e => new { Total = Sql.Ext.Count().Over().ToValue(), Item = e })
.Skip(1).Take(4)
.ToLinqToDB()
.ToListAsyncEF(cancellationToken)
;
int totalCustomers = customerResult.First().Total;
IEnumerable <Customer> customersData = customerResult.Select(c => c.Item).ToList();
QueryFutureEnumerable <Customer> getTotalCountFuture = baseQuery.Future();
QueryFutureEnumerable <Customer> getPageFuture = baseQuery.Skip(1).Take(4).Future();
int getTotalCountResult = getTotalCountFuture.Count();
IEnumerable <Customer> getPageResult = await getPageFuture.ToListAsync(cancellationToken);
return(View());
}
public async Task <IActionResult> IndexAsync(CancellationToken cancellationToken = default)
{
await Context.Database.EnsureCreatedAsync(cancellationToken);
await Context.GenerateDataAsync(cancellationToken);
int count = await Context.Customers.CountAsync(cancellationToken);
int futureCount = Context.Customers.Future().Count();
_logger.LogInformation($"Future Customer Count: {futureCount}");
QueryFutureValue <int> futureMaxPrice =
Context.Products.DeferredMax(x => x.Prices).FutureValue <int>();
QueryFutureValue <int> futureMinPrice =
Context.Products.DeferredMin(x => x.Prices).FutureValue <int>();
int maxPrice = futureMaxPrice.Value;
int minPrice = futureMinPrice.Value;
_logger.LogInformation($"Max Price: {maxPrice}");
_logger.LogInformation($"Min Price: {minPrice}");
IEnumerable <Product> resultPeopleActive =
await Context.Products.AsNoTracking()
.Where(c => c.IsActive)
.ToListAsync(cancellationToken)
;
IEnumerable <Product> resultPeopleNonActive =
await Context.Products.AsNoTracking()
.Where(c => !c.IsActive)
.ToListAsync(cancellationToken)
;
QueryFutureEnumerable <Product> resultPeopleActiveWithFuture =
Context.Products.AsNoTracking()
.Where(c => c.IsActive)
.Future()
;
QueryFutureEnumerable <Product> resultPeopleNonActiveWithFuture =
Context.Products.AsNoTracking()
.Where(c => !c.IsActive)
.Future()
;
IEnumerable <Product> resultPeopleActiveWith =
await resultPeopleActiveWithFuture.ToListAsync(cancellationToken);
IEnumerable <Product> resultPeopleNonActiveWith =
await resultPeopleNonActiveWithFuture.ToListAsync(cancellationToken);
if (resultPeopleActive == resultPeopleActiveWith &&
resultPeopleNonActive == resultPeopleNonActiveWith)
{
_logger.LogInformation("Results are the same .. !!!!");
}
//◘◘◘◘ Paging ◘◘◘◘
IQueryable <Product> query = Context.Products.Where(c => c.IsActive);
var page = await query.OrderBy(p => p.Name)
.Select(p => p.Name)
.Skip(1)
.Take(4)
.GroupBy(p => new { Total = query.Count() })
.FirstOrDefaultAsync(cancellationToken);
int total = page.Key.Total;
var people = page.Select(p => p);
IQueryable <Customer> baseQuery = Context.Customers.Where(c => c.IsActive);
QueryFutureEnumerable <Customer> getTotalCountFuture = baseQuery.Future();
QueryFutureEnumerable <Customer> getPageFuture = baseQuery.Skip(1).Take(4).Future();
int getTotalCountResult = getTotalCountFuture.Count();
IEnumerable <Customer> getPageResult = await getPageFuture.ToListAsync(cancellationToken);
return(View());
}
public async Task <IActionResult> IndexAsync(CancellationToken cancellationToken = default)
{
await Context.Database.EnsureCreatedAsync(cancellationToken);
await Context.GenerateDataAsync(cancellationToken);
int count = await Context.Customers.CountAsync(cancellationToken);
int futureCount = Context.Customers.Future().Count();
Console.WriteLine("Future Customer Count: {0}", futureCount);
QueryFutureValue <int> futureMaxPrice =
Context.Products.DeferredMax(x => x.Prices).FutureValue <int>();
QueryFutureValue <int> futureMinPrice =
Context.Products.DeferredMin(x => x.Prices).FutureValue <int>();
int maxPrice = futureMaxPrice.Value;
int minPrice = futureMinPrice.Value;
Console.WriteLine("Max Price: {0}", maxPrice);
Console.WriteLine("Min Price: {0}", minPrice);
IEnumerable <Product> resultPeopleActive =
await Context.Products.AsNoTracking()
.Where(c => c.IsActive)
.ToListAsync(cancellationToken)
;
IEnumerable <Product> resultPeopleNonActive =
await Context.Products.AsNoTracking()
.Where(c => !c.IsActive)
.ToListAsync(cancellationToken)
;
QueryFutureEnumerable <Product> resultPeopleActiveWithFuture =
Context.Products.AsNoTracking()
.Where(c => c.IsActive)
.Future()
;
QueryFutureEnumerable <Product> resultPeopleNonActiveWithFuture =
Context.Products.AsNoTracking()
.Where(c => !c.IsActive)
.Future()
;
IEnumerable <Product> resultPeopleActiveWith =
await resultPeopleActiveWithFuture.ToListAsync(cancellationToken);
IEnumerable <Product> resultPeopleNonActiveWith =
await resultPeopleNonActiveWithFuture.ToListAsync(cancellationToken);
if (resultPeopleActive == resultPeopleActiveWith &&
resultPeopleNonActive == resultPeopleNonActiveWith)
{
Console.WriteLine("Results are the same .. !!!!");
}
IQueryable <Customer> baseQuery = Context.Customers.Where(c => c.IsActive);
QueryFutureEnumerable <Customer> getTotalCountFuture = baseQuery.Future();
QueryFutureEnumerable <Customer> getPageFuture = baseQuery.Skip(1).Take(4).Future();
int getTotalCountResult = getTotalCountFuture.Count();
IEnumerable <Customer> getPageResult = await getPageFuture.ToListAsync(cancellationToken);
return(View());
}
