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8.7

LINQ to SQL, can you pass a query to another method

Asked by yami_rider in C# Programming Language, Language Integrated Query - LINQ

Tags: LINQ .NET C#

I am not quite sure if this can be done and likewise not quite sure that it should be done, given the DataContext likes to work atomically.

I have a data access layer class that I will use LINQ to SQL to query my SQL 2005 database, so the code looks something like this:
            //attempt to use LiNQ here
            using (Outbound.dcCaseDataContext db = new Outbound.dcCaseDataContext())
            {
                var query = from cases in db.tblCases select cases;
                //--> Call method here pass in query
            }

I want to call a method and pass in the query the method will do some more work with regards to mapping and other business processes. My thought is the method might look like this:

 public IQueryable<T> SomeMethod<T>(IQueryable<T> dbSupportCases)
        {
            //Do some work
            return dbSupportCases;
        }

My main worry here is with the DataContext object.  As well as proper design. The reason I need to pass in the query to another class is I have a business layer that needs to perform some mapping and I want to ensure separation of concerns.

Any guidence would be appreciated I have looked at a few blog sites such as http://www.west-wind.com/WebLog/posts/159522.aspx and other ones, but I am not quite sure it is what I am trying to do.

Thank you

[+][-]09/25/09 11:21 PM, ID: 25428941Accepted Solution

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About this solution

Zones: C# Programming Language, Language Integrated Query - LINQ
Tags: LINQ .NET C#
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Solution Provided By: daryal
Participating Experts: 2
Solution Grade: B
 
[+][-]09/26/09 12:07 AM, ID: 25429052Assisted Solution

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