All Questions
5 questions
10
votes
4
answers
18k
views
How to create an Expression builder in .NET
I have written some code to allow filtering of products on our website, and I am getting a pretty bad code smell. The user can select 1-* of these filters which means I need to be specific with the ...
- 1,683
4
votes
1
answer
258
views
Extending IQueryable with IsInDateTimeRange
So I am getting somewhat tired of rewriting the same queries over and over again.
repo.Query().Where(stuff => stuff.Timestamp >= minTime && stuff.Timestamp <= maxTime && ...);...
- 2,371
5
votes
2
answers
1k
views
Queryable.Aggregate is not working with null values
I'm writing a visitor which transforms IQueryable query. It uses Aggregate method with seed null and then use some func to transform it. My problem is that this null is of type decimal?. But I get an ...
- 10.1k
7
votes
1
answer
232
views
How to make LINQ-to-Objects handle projections?
I have implemented a basic (naive?) LINQ provider that works ok for my purposes, but there's a number of quirks I'd like to address, but I'm not sure how. For example:
// performing projection with ...
- 71.3k
2
votes
1
answer
5k
views
Cross-Join Syntax in Entity Framework / IQueryable
I'm trying to deepen my education about IQueryable custom providers and expression trees. I'm interested in custom parsing a cross-join (viz. SelectMany), and I'm trying to understand if that is ...
- 30.2k