tagged [iqueryable]
Cannot convert IQueryable<> to IOrderedQueryable error
Cannot convert IQueryable to IOrderedQueryable error I have the following LINQ code: That last lin
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- 27 May at 23:0
How to get the count from IQueryable
How to get the count from IQueryable I am implementing paging in my GridView. From [this](http://www.codedigest.com/Articles/ASPNET/153_Custom_Paging_for_GridView_using_LINQ.aspx) article, I need two ...
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- 27 Mar at 14:30
List<T> to implement IQueryable<T>
List to implement IQueryable I'm trying to create a mock for my `IRepository` interface: With this implementation: ``` public class RepositoryFake : List, IRepository { public Expression Expression ...
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- 20 Jul at 16:47
IEnumerable<T> and IQueryable<T> clarification?
IEnumerable and IQueryable clarification? After reading [this](https://stackoverflow.com/questions/2876616/returning-ienumerablet-vs-iqueryablet) question, I need to clear up some things. Questions: 1...
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- 9 Jan at 16:0
Determine whether an IQueryable<T> has been ordered or not
Determine whether an IQueryable has been ordered or not Is there a way to know if an `IQueryable` has been ordered (using `OrderBy` or `OrderbyDescending`)? So I know whether to call `OrderBy` or `The...
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- 21 Mar at 08:11
Combine Expressions instead of using multiple queries in Entity Framework
Combine Expressions instead of using multiple queries in Entity Framework I have following generic queryable (which may already have selections applied): Then there is the `Provider` class that looks ...
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- 24 Aug at 09:53
Concat Two IQueryables with Anonymous Types?
Concat Two IQueryables with Anonymous Types? I've been wrestling with this a little while and it's starting to look like it may not be possible. I want to `Concat()` two `IQueryable`s and then execute...
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- 1 Jul at 01:49
What is the purpose of AsQueryable()?
What is the purpose of AsQueryable()? Is the purpose of `AsQueryable()` just so you can pass around an `IEnumerable` to methods that might expect `IQueryable`, or is there a useful reason to represent...
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- 28 Jun at 14:27
Repository Methods vs. Extending IQueryable
Repository Methods vs. Extending IQueryable I have repositories (e.g. ContactRepository, UserRepository and so forth) which encapsulate data access to the domain model. When I was looking at , e.g. - ...
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- 15 Feb at 01:27
Repository / IQueryable / Query Object
Repository / IQueryable / Query Object I am building a repository and I've seen in many places 2 reasons not to expose IQueryable outside the repository. 1) The first is because different LINQ provide...
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- 16 Aug at 00:6
Instantiate empty IQueryable for use with Linq to sql
Instantiate empty IQueryable for use with Linq to sql I need to be able to either have an optional parameter in a Linq query, or be able to assign the query to a var in something like an IF if that op...
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- 28 Apr at 17:44
How to invoke Expression<Func<Entity, bool>> against a collection
How to invoke Expression> against a collection I have an interface that defines a repository from the Repository pattern: I've implemented it against Entity Framework: ``` class EntityFrameworkReposit...
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- 24 Sep at 03:51
In which cases do I need to create two different extension methods for IEnumerable and IQueryable?
In which cases do I need to create two different extension methods for IEnumerable and IQueryable? Let's say I need an extension method which selects only required properties from different sources. T...
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- 28 Dec at 21:57
Remove OrderBy from an IQueryable<T>
Remove OrderBy from an IQueryable I have a paging API that returns rows a user requests, but only so many at one time, not the entire collection. The API works as designed, but I do have to calculate ...
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- 14 May at 21:2
Use IQueryable.Count<T> with an IEnumerable<T> parameter
Use IQueryable.Count with an IEnumerable parameter imagine a class, let's say for pagination which could be used with an `IList` or an `IQueryable`. That class would have an `int TotalItems` property,...
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- 8 Mar at 16:39
Enumerable.Empty<T>().AsQueryable(); This method supports the LINQ to Entities infrastructure and is not intended to be used directly from your code
Enumerable.Empty().AsQueryable(); This method supports the LINQ to Entities infrastructure and is not intended to be used directly from your code I am getting runtime error > This method supports the ...
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- 14 Jun at 15:9
How do I mock IQueryable<T>
How do I mock IQueryable I am creating a repository that exposes IQueryable. What is the best way to mock this out for my unit testing? Since I am using RhinoMocks for the rest of my mock objects, I t...
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- 12 Feb at 04:39
Automatically Compile Linq Queries
Automatically Compile Linq Queries We've found that [compiling our Linq queries](http://www.dotnetfunda.com/articles/article469-how-to-improve-your-linq-query-performance-by-5-x-times-.aspx) is much, ...
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- 4 Aug at 19:53
Exposing EntityFramework 4 entities as IList instead of IObjectSet
Exposing EntityFramework 4 entities as IList instead of IObjectSet I have a 'Customer' POCO entity within my Entity Framework 4 project. I want to expose my Customer entities to my upper layers as a g...
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- 6 Jan at 11:10
ObjectSet wrapper not working with linqToEntities subquery
ObjectSet wrapper not working with linqToEntities subquery for access control purposes in a intensive DB use system I had to implement an objectset wrapper, where the AC will be checked. The main obje...
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- 7 Feb at 14:20
AutoMapper Project().To() and sorting a child collection
AutoMapper Project().To() and sorting a child collection I have an object graph that I'm loading from a database using EF CodeFirst and AutoMapper into DTOs:- ``` public class Foo { public int Id { g...
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- 23 Apr at 13:15
The provider for the source IQueryable doesn't implement IAsyncQueryProvider
The provider for the source IQueryable doesn't implement IAsyncQueryProvider I have some codes like below, I want to write unit tests my method. But I'm stuck in async methods. Can you help me please ...
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- 25 Jun at 14:3
C#, Linq2Sql: Is it possible to concatenate two queryables into one?
C#, Linq2Sql: Is it possible to concatenate two queryables into one? where I have used various [Where](http://msdn.microsoft.com/en-us/library/system.linq.queryable.where.aspx) and [WhereBetween](http...
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- 23 May at 10:32
Implement IQueryable wrapper to translate result objects
Implement IQueryable wrapper to translate result objects After having a look at the 'Building an IQueryable provider series' (thanks for the link!) I got a bit further. I updated the code accordingly....
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- 25 Aug at 22:42