Geeks With Blogs

News TFS is just too much fun not to share. So, along with some of my TFS colleagues, we have organized a local TFS community.
Check us out.
TFS Austin Agile SCM Talk Visual Studio ALM Team Foundation Server Practice

Using a MVC 4 Code First project I noticed that my intermediate table between a many to many relationship was missing. In other words, Table 1 has many Table 3, and Table 3 has many Table 1. In the database schema, Table 2 is my intermediate table:

  • Table 1 has many Table 2 and Table 2 has only one Table1
  • Table 3 has many Table 2 and Table 2 has only one Table3, as follows:

 

 EF

However, as I stated earlier, I did not have a model class for Table 2.  At first I was miffed, but once I was able to craft the query, I was impressed at how easy EF made this.  I wanted to get a listing of Table 3 fields for a specific ProjectID (pID) in Table 1.  Here’s the query :)

var Table3Qry = from t3 in db.Table3 
from t2 in t3.Table1.Where(x => x.ProjectID == pID) 
select new { t3.foo1, t3.foo2, t3.foo3 };
Posted on Thursday, December 27, 2012 10:44 AM | Back to top


Comments on this post: LINQ (C#) Many to Many Query using Entity Framework

No comments posted yet.
Your comment:
 (will show your gravatar)


Copyright © Bob Hardister | Powered by: GeeksWithBlogs.net | Join free