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ربط IQueryable مع IEnumerable إلى IQueryable

does converting IQueryable to IEnumerable execute the ...

Queryable.AsQueryable Method (System.Linq) يوفر إرجاع IQueryable (الذي ينفذ IEnumerable ، بالمناسبة) وظيفة إضافية لترجمة الاستعلام الخاص بك إلى شيء قد يؤدي بشكل أفضل على المصدر الأساسي (LINQ إلى SQL ، LINQ إلى XML ، وما إلى ذلك). Returning IEnumerable vs. IQueryable IEnumerable VS IQueryable Remarks. If the type of source implements IQueryable, AsQueryable(IEnumerable) returns it directly. Otherwise, it returns an IQueryable that executes queries by calling the equivalent query operator methods in Enumerable instead of those in Queryable.. This method assumes that source implements IEnumerable for some T.At runtime, the result is of type IQueryable for the same T. An IQueryable is an IEnumerable. There is no conversion, and therefore no work of any kind going on. There is no conversion, and therefore no work of any kind going on. The work happens when you call GetEnumerator() , either explicitly or by invoking foreach on it. IEnumerable vs IQueryable for Business Logic or DAL return Types. Hot Network Questions Can smartphones, like iPhone 12 Pro, replace entry-level DSLR cameras? How does debt-trap diplomacy work? Sequences of distinct positive integers What is the best way for a low-level, non-magical NPC to contact a player-character? ... إرجاع IEnumerable مقابل IQueryable Yes, both will give you deferred execution.. The difference is that IQueryable is the interface that allows LINQ-to-SQL (LINQ.-to-anything really) to work. So if you further refine your query on an IQueryable, that query will be executed in the database, if possible.. For the IEnumerable case, it will be LINQ-to-object, meaning that all objects matching the original query will have to ...

Returning IEnumerable vs. IQueryable

The difference between IQueryable and IEnumerable How change List data to IQueryable data ... Possible Duplicate: IList to IQueryable I have a List data, but I want a IQueryable data , is it possible from List data to IQueryable data? Show me code. Stack Overflow. About; Products For Teams ... Returning IEnumerable vs. IQueryable 1083. Group by in LINQ. 559. Calculate the execution time of a method. 1446. IQueryable vs IEnumerable VS List<> The main difference is that in addition to being IEnumerable, IQueryable also has a reference to a query provider and a query expression. "If I can see further than anyone else, it is only because I am standing on the shoulders of giants."blog: …

إرجاع IEnumerable مقابل IQueryable

Queryable.Cast(IQueryable) Method (System.Linq ... NET collections, so if you are new please see this article and t he IQueryable interface inherits from IEnumerable interface, so whatever IEnumerable can do, IQueryable can also do. The IQueryable interface is the same as IEnumerable interface but it also provides additional functionality to implement custom querying with LINQ. IQueryable is Tight Coupling The Cast(IQueryable) method generates a MethodCallExpression that represents calling Cast(IQueryable) itself as a constructed generic method. It then passes the MethodCallExpression to the CreateQuery(Expression) method of the IQueryProvider represented by the Provider property of the source parameter. The IQueryable and IEnumerable interfaces do not define a contract that states how a query is executed. It is the implementation of the interface that controls it. The difference in the way it executes in your example is because of the difference between calling the Where extension method on the Queryable class vs the Where extension method on ... IEnumerable vs IQueryable 이 필터는 IEnumerable 코드가있는 클라이언트 측에서 실행됩니다. 즉, 모든 데이터가 데이터베이스에서 가져온 다음 클라이언트에서 EmpId 하여 레코드를 검색하고 가져옵니다. 하지만 이제 IEnumerable 을 IQueryable 변경 한 아래 코드를 참조하십시오. 서버 측에서 SQL ... public IQueryable{Customer} GetActiveCustomers() {return CustomersDb.Where(x => x.IsActive).ToList().AsQueryable();} tells consumers that the return value of the method is a representation of how the results will be materialized when the query is executed. Saying this, OTOH: public IEnumerable{Customer} GetActiveCustomers() "How to Use" IEnumerable and IQueryable [IEnumerable vs ...

IEnumerable VS IQueryable

Repository 返回 IQueryable?还是 IEnumerable? I have written these questions on two other websites - forums - 0 answers. I think nobody understand ienumerable, iqueryable and iorderedqueryable - so if also here nobody answer me you should delete iqueryable and iorderedqueryable and stay only ienumerable because it will mean that nobody understand that. The generic IQueryable is the one you use most often in method signatures and the like. The non-generic IQueryable exist primarily to give you a weakly typed entry point primarily for dynamic query building scenarios.. by Matt Warren from LINQ: Building an IQueryable Provider - Part I. You should use generic IQueryable everywhere it's possible. IQueryable vs IQueryable Queryable.Concat(IQueryable, … IQueryable 继承自 IEnumerable,它们俩最大的区别是,IQueryable 是表达式树处理,可以延迟查询,而 IEnumerable 只能查询在本地内存中,Repository 的概念就不多说了,在“伪 DDD”设计中,你可以把它看作是数据访问层。 下面我们先实现 Repository 返回 IEnumerable: Oba powyższe interfejsy mogą wydawać się bardzo podobne do siebie. Interfejs IQueryable implementuje interfejs IEnumerable: namespace System.Linq { // // Summary: // Provides functionality to evaluate queries against a specific data source wherein // the type of the data is not specified. IEnumerable vs IQueryable تخطي إلى المحتوى الرئيسي ... (IQueryable, IEnumerable) depends on the implementation of the type of the source1 parameter. The expected behavior is that the elements in source2 are concatenated to those of source1 to create a new sequence. Applies to.