Join in LINQ and Entity Framework

Cross edmx "join" between Linq to Entities and Entity Framework

I have two entities, each with separate edmx files since they came from various databases. However, there is an implied connection between them....Foo... has many...Bar... s, for instance....What is the quickest and least resource-intensive approach to do this join using EntityFramework?...Thanks.

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

I've seen several articles on using a database in a WPF.Net 4 application. I believe the primary two technologies are:...SQL with Linq (L2S)...Enterprise Framework (EF)...I sometimes see mention of the Linq to Entities (L2E) technology, but I can never figure out what makes L2E different from EF....So, my question is: Are there any differences betw...

Outer left Entity Framework through Linq To Entities using Where Clause

I have studied every topic on how to use the Entity Framework with Linq to Entities (.NET 3.5) to create the LEFT OUTER JOIN equivalent, but I haven't been able to find a solution to the following issue....Considering the two tables shown below as objects:... public class Foo { public int FooId; // primary key public string ...

Should I use lambda or LINQ for a multi-table join in Entity Framework 4.1?

I'm attempting to convert a multi table join to utilize the Entity Framework since I'm new to it. The first SQL had a similar appearance....JOIN tab_NewsCommunities S1 ON S1.News_ID = tab_News.NewsID inner join tab_communities com on S1.Community_ID = com.Community_ID and com.RecordStatus_ID = 2 JOIN tab_Communities c ON S1.Community_ID = c.Communi...

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

Can somebody assist me in resolving my problem? I'm use the code below:...public IEnumerable<InvoiceHeader> Getdata(Expression<Func<InvoiceHeader, bool>> predicate) { return AccountsContext.InvoiceHeaders.Include("Company").Include("Currency") .Include("BusinessPartnerRoleList").Include("DocumentType") .Where(predicate); } .....

LEFT JOIN or RIGHT JOIN using LINQ Entity-Framework

Try using Linq for joining. What ought I to use? Right or left joining?... APPLICANT TABLE PROFILE TABLE APPLICANT_ID|profile_id|Applicant_Name| |profile_id|Applicant_Name 1 | NULL | RAY HEAVENS | | 1 | MARK LAPID 2 | NULL | BEN TULFO | | 2 | SUPER MAN 3 | 1 ...

Entity Framework LINQ joining 5 tables on multiple columns (impossible?!)

Please view the picture....In order to merge 5 distinct tables on 1 to 3 different columns, I'm attempting to build a LINQ query. I just duplicate the join portions from the examples for the first two tables for tables three through five....UPDATE: How do I make the LINQ query below work?... var match = (from t1 in context.cKNA1 ...

Entity Framework left join on multiple tables creates inner join instead

Only one of the four tables in the query I'm trying to build will be guaranteed to exist. Creating left joins in EF has always worked for me, but never with more than one join. This is the problem:... var details = (from planInfo in context.PlanInfo join templateRec in context.ProductTemplates on planInfo.Temp...

Entity Framework forcing Inner Join when Left Join DefaultIfEmpty() Syntax used

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Only parameterless constructors and initializers are supported in LINQ to Entities in linq join with tuples

It says that only parameterless constructors and initializers are supported in LINQ to Entities when I attempt to combine two tables and build a tuples list....var list = ( from a in db.CategoryRatings join c in db.OverallPerformanceByCategories on a.CategoryRatingId equals c.CategoryRatingId where c.ReviewId == review.ReviewId ...