CODEWITHSUNDEEP
c#linqlinq-extensions
andrey.shedko
andrey.shedko

Reputation: 3238

Custom LINQ extension for make join

Let's say I need create custom expression to make some manipulation with IQueryable<x> and IQueryable<y>. Regretfully I do not have idea how to implement this. This is my try:

public static IQueryable<T> JoinQueries<T>(this IQueryable<T> query, IQueryable<T> expr)
        {
           if (query == null)
                throw new ArgumentNullException("query");
            //Here we make Join for x and and return result something like this:
           query = from a in query join b in expr on a.Id equals b.Id select a;
            return query;
        }

Or say other words I need result like this:

IQueryable <somevalue> x = query.CustomJoinExtension(Iqueryablevalue);

Upvotes: 0

Views: 230

Answers (1)

Davor Zlotrg
Davor Zlotrg

Reputation: 6050

Something like this: 

public static IQueryable<T> JoinQueries<T>
(this IQueryable<T> query, IQueryable<T> expr) where T : IHasId
{
    if (query == null)
        throw new ArgumentNullException("query");
    //Here we make Join for x and and return result something like this:
    query = from a in query join b in expr on a.Id equals b.Id select a;
    return query;
}

public interface IHasId
{
    int Id { get; set; }
}

Upvotes: 1

Related Questions