Convert to list after Cast<T>

Posted by Timmie Sarjanen on Stack Overflow See other posts from Stack Overflow or by Timmie Sarjanen
Published on 2010-03-25T22:06:36Z Indexed on 2010/03/26 0:13 UTC
Read the original article Hit count: 647

Filed under:

iqueryable

|

tolist

|

interfaces

Hi, I need to convert an IQueryable to List(is it possible to convert to IList?). There had not been an problem if it was not that i need to Cast because I have interfaces to my objects. I've tried most things but for some reason I must run Cast first and then ToList() which generates System.NullReferenceException. How do I solve this?

public IQueryable GetPhrases() {
return (from r in _repository.All<Phrase>()
select r).Cast<IPhrase>()
}

© Stack Overflow or respective owner

Related posts about iqueryable

How to return an IQueryable<Something> as an IQueryable<ISomething>

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a class Something that implements ISomething. How can I convert/cast from an IQueryable<Something> to an IQueryable<ISomething>. When I try to cast, I am able to compile, but the result of the cast is always NULL. >>> More
Using an existing IQueryable to create a new dynamic IQueryable

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a query as follows: var query = from x in context.Employees where (x.Salary > 0 && x.DeptId == 5) || x.DeptId == 2 order by x.Surname select x; The above is the original query and returns let's say 1000 employee entities. I would now like to use the first query to… >>> More
What's the difference between IQueryable and IEnumerable

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm confused as to the difference. Being fairly new to .Net, I know I can query IEnumarables using the Linq extensions. So what is this IQueryable and how does it differ? >>> More
How can I write a clean Repository without exposing IQueryable to the rest of my application?

as seen on Stack Overflow - Search for 'Stack Overflow'
So, I've read all the Q&A's here on SO regarding the subject of whether or not to expose IQueryable to the rest of your project or not (see here, and here), and I've ultimately decided that I don't want to expose IQueryable to anything but my Model. Because IQueryable is tied to certain persistence… >>> More
Linq IQueryable variables

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi i have a function that should return me a string but what is is doing is bringing me back the sql expression that i am using on the database what have i done wrong public static IQueryable XMLtoProcess(string strConnection) { Datalayer.HameserveDataContext db = new HameserveDataContext(strConnection); … >>> More

Related posts about tolist

Using ComplexType with ToList causes InvalidOperationException

as seen on Stack Overflow - Search for 'Stack Overflow'
I have this model namespace ProjectTimer.Models { public class TimerContext : DbContext { public TimerContext() : base("DefaultConnection") { } public DbSet<Project> Projects { get; set; } public DbSet<ProjectTimeSpan> TimeSpans… >>> More
stack.ToList() in .NET - order of elements?

as seen on Stack Overflow - Search for 'Stack Overflow'
When using the .ToList() extension method on a Stack<T>, is the result the same as popping each element and adding to a new list (reverse of what was pushed)? If so, is this because it really is iterating over each element, or does it store the elements in reverse internally and slip the array… >>> More
Compile error when calling ToList() when accessing many to many with Linq To Entities

as seen on Stack Overflow - Search for 'Stack Overflow'
I can't figure out what I am doing wrong. I have the following method: public IList<WObject> GetRelationshipMembers(int relId) { var members = from r in _container.ObjectRelationships where r.Id == relId select r.WObjects; … >>> More
Issue converting Sitecore Item[] using ToList<T>

as seen on Stack Overflow - Search for 'Stack Overflow'
Working with Sitecore and Linq extensions. I am trying to convert to from an item array to the list using the following piece of code: Item variationsFolder = masterDB.SelectSingleItem(VariationsFolderID.ToString()); List<Item> variationList = variationsFolder.GetChildren().ToList<Item>(); However… >>> More
ToList()-- Does it Create a New List?

as seen on Stack Overflow - Search for 'Stack Overflow'
Let's say I have a class public class MyObject { public int SimpleInt{get;set;} } And I have a List<MyObject>, and I ToList() it and then change one of the SimpleInt, will my change be propagated back to the original list. In other words, what would be the output of the following method… >>> More