şayet milyonlarca eşya üzerinde sorgulama anlayışlemi kuruluşyorsak lacerem IQueryable IEnumerable bakılırsa daha hızlı sorgulama nöbetlemi yapar.
In case of IEnumerable, only lines up to the element of interest will be read from the file. In case of ToList call over the enumerable, the entire file would be read before even starting the search.
I understand why IQueryable is better choice for "out-of-memory" data but I am struggling to understand why IEnumerable is better for "in-memory" data? I still think it's better to get filtered data than to get get data and apply filter.
JWT Claimlerle çallıkışmamız nasıl olmalı hocam güya HttpContextAccessor'u falan devreye sokuyorduk
To get them I use VisualTreeHelper class. But I have to consider that there might be A LOT OF children so copying to some array or Collection will by expensive. – drasto 5 mins ago
The compiler performs pattern matching. The GetEnumerator method just needs to return a class / struct which in turn katışıksız a Current property and a MoveNext method that returns a bool. I birey highly recommend Eric Lipperts blog post about pattern matching
So the difference between IQueryable and IEnumerable is about where the filter logic is executed. One executes on the client side and the other executes on the database.
For small result sets this is C# IEnumerable Temel Özellikleri likely to be a single trip, for large ones you're sending a request for more rows from the results, but it doesn't re-run the entire query.
Now what makes IEnumerable really stand out is iterator blocks (the yield keyword in C#). Iterator blocks implement the IEnumerable interface like a List or an Array, but they're very special because unlike a List or Array, they often only hold the state for a single item at a time. So if you want to loop over the lines in a very large file, for example, C# IEnumerable Nerelerde Kullanılıyor you birey write an iterator block to handle the file input.
for instance, suppose you decided to read a large file line by line and doing something on that, therefore you dirilik write your own ReaderEnumrable to read your file
Then with a IQueryable C# IEnumerable Kullanımı the generated SQL will contains “where name = “a”, but with a IEnumerable many more roles will be pulled back from the database, then the C# IEnumerable Kullanımı x.name = “a” check will be done by .Kemiksiz.
something is up with your image link, its not rendering in the post body for some reason C# IEnumerable Nerelerde Kullanılıyor codeproject.com/KB/cs/646361/WhatHowWhere.jpg
IQueryable is a very powerful feature that enables a variety of interesting deferred execution scenarios (like paging and composition based queries).
Here is why it loads twice birli fewer items bey the first example on average. Let's say probability to find element at any position in the range of files is the same.