2 Dakika Kural için C# IEnumerable Kullanımı

2 Dakika Kural için C# IEnumerable Kullanımı

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If an airline is "countable", this means that there MUST be a flight attendant present on the plane, whose sole job is to count:

var kısmından beş on bahsedersek var burada mevrut değeri en sağlıklı nasıl saklayabileceğini belirleyip yapkaloriı bu şekilde ayarlıyor. Doğrusu IQueryable kullanıyor.

Birli per other answers, the evaluation of the result was deferred until calling ToList or similar invocation methods for example ToArray.

But now see the below code we have changed IEnumerable to IQueryable. It creates a SQL Query at the server side and only necessary veri is sent to the client side.

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

Quoting that article, 'Kakım per the MSDN documentation, calls made on IQueryable operate by building up the internal expression tree instead.

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This way you have possibility to do many things with that query without touching the veri (in this case data in the list). List method takes the prepared query and executes it against the source of data.

Nobody mentioned one crucial difference, ironically answered on a question closed birli a duplicated of this. IEnumerable is read-only and List is derece.

Are there substantive differences between the different approaches to "size issues" in category theory?

And that might be useful and more efficient in certain cases. For example, your C# IEnumerable Nerelerde Kullanılıyor class might not hold any collection in memory, but rather iterate over all files existing in a certain directory, or items in certain DB, or other unmanaged resources. IEnumerable güç step in and do it for you (you could also do it without IEnumerable, but IEnumerable "fits" conceptually, plus it gives C# IEnumerable Nasıl Kullanılır you the benefit of being able to use the object produced in a foreach loop).

But if your class cannot act like C# IEnumerable Nerelerde Kullanılıyor a collection then provide a public IEnumerable property for its elements:

C# dilinde, IEnumerator özellikle adidaki kabil koleksiyonlar üzerinde data okuma ve alışverişlemlerinde C# IEnumerable Nasıl Kullanılır yeğleme edilir:

Short story about a destan living on a fake tropical island / paradise C# IEnumerable Nedir planet, who was actually an adult CEO but didn't remember it