This was one of the first extension methods I wrote when C# 3.0 arrived, since I just stumbled across it on an older project I figured I might as well post it, if for nothing else but future reference. One downside to be aware of if you choose to use this method, is that it will not project the results on a IQueryable provider like LINQ to SQL, so please be aware the conversion will be done on the client side. The Code public static class DelimitedStringExtensions { public static string DefaultDelimiter = ", "; ///...

LINQ and Expression Trees have enabled a ton of possibilities for us as developers, particularly in establishing some code-reducing convention based querying. I have found myself playing with Expressions in C# since their inception and will hopefully be publishing a few other posts I have queued up. For now, this post will simply demonstrate how to take advantage of a popular convention whereby each database table always has a single integer primary key named “Id” By taking advantage of this primary key convention I can save myself a ton of boilerplate code to query a table by ID. ...

A couple months ago I wrote a basic set of extension methods to handle automatic auditing in LINQ to SQL. Well I have received a large number of emails regarding this particular project so I have decided to focus on cleaning up my v2 API and releasing it on CodePlex. There was a lot of room for improvement from version 1 and today I am going to post the all new LINQ Audit Trail code. This new version is significantly enhanced in the previous version. Objective Automatic auditing of all inserts/updates/deletes for any table in your database with...

UPDATE: This post is outdated and has significantly enhanced with a new version. Please see LINQ Audit Trail V2  In a project I am currently working on, we had a fairly common requirement of recording an Audit Trail of any data changes. The requirements were typical, provide a running log of any changes in the database, including: What table was modified? What fields changed? Who made the change? When did it occur? Naturally, there are many ways to tackle this...

This post is a follow-up to an article I wrote a few weeks ago, ADO.NET Entity Framework Comparison Frustration. As a quick re-cap, I was simply trying to filter a list of users with a LINQ query expression by comparing custom classes, not primitive types. TorvusEntities entities = new TorvusEntities(); // Pull my Account Entity from the database Account matt = entities.Accounts.First(a => a.AccountId == 10); // Attempt to get all Teams by a Team Owner var teams = from t in entities.Teams where t.Owner == matt ...