Entity framework linq include

Which book is the best for learning Linq, especially Linq to Entities?

I heard lots of reviews on the book Linq in Action, but it does not cover Linq to Entities. ... Please provide your feedback on the books you may have read.

Linq to Entities and Entity Framework Include() a few of tables, or

i've got a database with a table named PropertyValues where i store every value i need to describe some properties of my database table rows....For example, table Products which looks like this :...ID...OrderID... //Products table is related with Order table...ProductName...ProductType_ID... // ID of PropertyValues table which describes product typ...

Video lessons on ASP.NET MVC, Entity Framework, and LINQ - including MIX09, PDC, and TechED

Conferences:...ASP.NET MVC from MIX'09 Sessions...http://tinyurl.com/cs6z5y...NDC2009 videos...PDC 2008 Sessions for ...download...Micorosoft TechED Sessions (...download...)...You can also download the specific DVD that cover only MVC, Entity Framework and LINQ sessions. The complete size is 6.+ GB....and few more:...tinyurl.com/24eum5...tinyurl.c...

LINQ to Entities only supports casting in the Entity Framework. basic kinds in the Entity Data Model

I know this is old, but I was looking to accomplish the exact same thing as the OP and didn't want to use the ...Func<IQueryable<T>, IOrderedQueryable<T>>... in my dictionary. Mostly because I would have to implement both an ...OrderBy... and ...OrderByDescending... delegate....I ended up creating an extension method for IQueryable called ...Object...

Linq query in Entity Framework multiple children entities include()

EF 4.1 to EF 6...There is a ...strongly typed ....Include... which allows the required depth of eager loading to be specified by providing Select expressions to the appropriate depth:...using System.Data.Entity; // NB! var company = context.Companies .Include(co => co.Employees.Select(emp => emp.Employee_Car)) ...

Linq to Entities vs. Linq to SQL vs. Entity Framework

I read a lot of articles about how to work with a database in WPF .Net 4 application. As I understood, the main two technologies are:...Linq to SQL (L2S)...Entity Framework (EF)...but sometimes I also can see mention of Linq to Entities (L2E) technology, but can't find clear explanation what difference between EF and L2E....So, my question is: Does...

The LINQ expression node type 'Invoke' is not supported in the entity framework's LINQ to Entities.

can anyone help me out in solving my issue. I am using the code given below:...public IEnumerable<InvoiceHeader> Getdata(Expression<Func<InvoiceHeader, bool>> predicate) { return AccountsContext.InvoiceHeaders.Include("Company").Include("Currency") .Include("BusinessPartnerRoleList").Include("DocumentType") .Where(predicate); } ...

Entity Framework recursively include collection for each entity from included collection

You have to add an .Include call for each level in you object hierarchy tree:... var result = db.Countries .Include(m => m.Cities) .Include(m => m.Cities.Select(v => v.People)) .Where(....) ...Edit : D.Stanley answer is better in terms of compact code, and works as well, I tend to prefer this syntax in terms of m...

Filtering include items in LINQ and Entity Framework

I recon this way looks more cleaner and shorter. Not sure about database impact ... var rootCategoryItem = DatabaseContext.Categories.SingleOrDefault(); if (rootCategoryItem == null) return null; { rootCategoryItem.Items = rootCategoryItem ?.Items.Where(x => !x.IsDeleted).ToList(); return rootCategoryItem; }

Linq EF Include() with Select() new type lost included

Any operations you do after the includes (except for filtering) will cause the includes to be discarded. By calling ...AsEnumerable... after the includes, you will make sure the query gets executed then and the rest of the operations will be done in memory:...context.Projects .Include(x => x.Members) .Include(x => x.Members.Select(z...