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Objects attached to the object context are managed by that object context. Observe the code shown below: All we are doing here is create a new instance of the Customer type and populate its properties.
In this article, we will see how to Add, Update and Delete objects in our conceptual model and push the changes to the underlying database.
A couple weeks ago, I read the article, LINQ to SQL Extension: Batch Deletion with Lambda Expression by Jeffrey Zhao.
In case you didn’t read the article, it discusses the downside of most O/R Mapping frameworks when it comes to multiple updates or deletes.
Hi I'm working on winforms project with openaccess as my orm and this is my first try of openaccess orm.
I have some question: In your examples, you define a private variable on top of form holding data context. If i use a short-lived context like to load entities at form load event and then try to save changes at save button clicked event use another short-lived context, i'v got errors like: "Object references between two different object scopes are not allowed." which is understandable. i mean using short-lived context and disconnected entities.
If I were to include a review of LINQPad, it would be but I don’t want to consume this post on that, however in case you do not know what LINQPad is, for the purpose of this article, it allows us to write LINQ to SQL statements along with any other arbitrary C# code (basically just a disclaimer that you will not see any Data Context creation/code in my samples since it is implicit in LINQPad).