dynamic-linq

This question is continuation of Getting Count() property in Dynamic Lambda Expression I had asked if we can put Count() Method in dynamic lambda expression. I could do it using Dynamic Expression API . Answer provided by - xmojmr But recently I had to implement a Dynamic Lambda Expression to get result with its child entity with filtered data. Details : I have a parent entity with its child entity linked. Now when I get data from parent entity, it returns a collection of data with its child data too. as per my previous requirement I had to count all child record returned with respect to each

I am using Dynamic Linq to perform some queries (sorry but it's my only option). As a result, I am getting an IQueryable instead of an IQueryable<T> . In my case, I want an IQueryable<Thing> where Thing is a concrete type. My query is as such: public IQueryable<Thing> Foo(MyContext db) { var rootQuery = db.People.Where(x => x.City != null && x.State != null); var groupedQuery = rootQuery.GroupBy("new ( it.City, it.State )", "it", new []{"City", "State"}); var finalLogicalQuery = groupedQuery.Select("new ( Count() as TotalNumber, Key.City as City, Key.State as State )"); var

I'd like to extend the AuthorizeAttribute in ASP.NET MVC so that it supports the concept of a user's authorization being based on their role membership OR "ownership" of the data in question. I'm using LINQ2SQL for data access. There is a similar question at asp.net mvc authorization using roles . What I'm thinking is adding EntityProperty, UserProperty, RouteParameter, and JoinTableType parameters to my extended AuthorizeAttribute class. The first two would be the names of the properties in the join table to check. The RouteParameter would be the name of the route parameter to extract for the

I have a list of customers that can be sorted by anywhere from 1 to 6 fields based on a user's selection. The sort fields can be in any order. If I know the fields and the sequence ahead of time, sorting is easy: customers = customers .OrderBy(c => c.LastName) .ThenBy(c => c.City) .ThenBy(c => c.Age).ToList(); How would I pass in the sort fields at runtime? Is there a way to do something like this? string sortField1 = "State"; string sortField2 = "City"; string sortField3 = "Type"; customers = customers .OrderBy(c => c.sortField1) .ThenBy(c => c.sortField2) .ThenBy(c => c.sortField3).ToList();