CODEWITHSUNDEEP
c#.netlinq-to-sql.net-3.5
Mustafa Shabib
Mustafa Shabib

Reputation: 740

Creating partial methods on compiled LINQ->SQL class

If I want to compile my LINQ->SQL classes into a DLL to provide to my developers, how can I make it so that they can still hook into the various entity partial methods (OnValidate, for example)? I know that you cannot implement partial methods on a compiled assembly, but any suggestions on how I can extract this behavior (perhaps with events?) would be appreciated.

Upvotes: 0

Views: 173

Answers (4)

Johannes Rudolph
Johannes Rudolph

Reputation: 35741

If I want to compile my LINQ->SQL classes into a DLL to provide to my developers

I dont think that this is a good idea. There are so many reasons why a LinqToSql Model might want to change. You will likely need to modify your model while discovering new insight into your domain etc.

By creating a seperate DLL "to provide to your developers" you create an artificial boundary that is likely to hinder efficiency in development. Getting a source control system might be more appropriate for what you may try to accomplish (beeing VERY vague here)

Upvotes: 0

Ryan Versaw
Ryan Versaw

Reputation: 6495

You may need to customize this solution for your needs, but a simple way of publishing events from partial methods can be done like so:

partial class LinqClass
{
    public event Action<LinqClass, ChangeAction> OnValidating;

    partial void OnValidate(ChangeAction action)
    {
        if (OnValidating != null)
        {
            OnValidating(this, action);
        }
    }
}

You may or may not need to pass along different parameters, but the Action will support numerous.

Upvotes: 1

Kyle Rosendo
Kyle Rosendo

Reputation: 25277

As far as I am aware, you cannot.

When partial classes are encountered by the compiler, it combines them together to form a complete class. The only way I see your needs being fulfilled is to make your classes inheritable, but with L2S, this may prove to be more trouble than it's worth.

EDIT:

As for events, depending on the size of your L2S class count, it all depends on what you're willing to put in. This solution could work, but will take a long time to get right. Combining Interfaces with events and custom handlers can get you there, just be prepared for the time investment if there are a large number of classes you want accessible.

MSDN - Partial Classes

Upvotes: 1

JoshJordan
JoshJordan

Reputation: 12975

I would handle this by publishing public events at any point you desire.

Upvotes: 0

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