WebSep 5, 2014 · The IEnumerable works with collection in local memory whereas IQueryable works with queryable data provider. If you are working with LINQ to SQL then best is to work IEnumerable ... WebApr 25, 2024 · We have two very different implementations of the MyWhere method: MyEnumerable.MyWhere and MyQueryable.MyWhere. Let's take a quick look at how they work. MyEnumerable.MyWhere In MyEnumerable.MyWhere, we operate directly upon the original IEnumerable. The logic here is very simple.
c# - How to select all using IQueryable - Stack Overflow
WebOct 7, 2024 · Brings all the records from db and hold it memory , then execute OrderBY,ThenBy,Skip and Take method .This will big performance issue. 4. Now AsQueriable() is nothing but creating our linq expression, it will also execute only when it find First(),toList() methods.You will find Beauty of AsQueryable() when you use repository … WebSep 29, 2015 · Use the ODataQueryOptions object to apply all query options on the IQueryable except Expand and Select (this lets EF translate the filter, skip and take to SQL and apply those directly in the DB) Perform the needed filtering in memory, on the result. Use the ODataQueryOptions object to apply Select and Expand on the filtered result. chinese fake cities
IEnumerable VS IQueryable Asp.net MVC, JavaScript, JQuery, …
WebAug 19, 2024 · IEnumerable : use when you deal with in process memory object collections and loop through the collection objects. Provides a forward-only in-memory presentation of data.... WebJan 25, 2024 · You can manually select all properties and map to a new instance like this: var postWithHitsAndCreationTime = await dbContext .Posts .Where (p => p.Id == postId) .Select (p => new Post { Hits = p.Hits, CreationTime = p.CreationTime // <- Only select the properties you need. }) . FirstOrDefaultAsync (); WebAug 16, 2024 · If we're using LINQ with our data provider, then we can use the query provider to perform a Select projection var dest = await dbContext.Destinations .Where(d => d.Id = id) .Select(d => new Dest { Thing = source.Thing, Thing2 = source.Thing2, FooBarBaz = source.Foo.Bar.Baz. }) .FirstOrDefaultAsync(); chinese fake fast food logos