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Note: By default, EF will lazy load any child relationships (i.e child objects, collections, etc).

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Now if I need to also update each row of another table which is a child of Customer called Orders what changes do I need to make to the class My Repository.

Orders table will have multiple records for a Customer record and multiple fields too, say for example Field1, Field2, Field3. See this answer for details on how to attach disconnected entities.

In the previous tutorial you displayed related data; in this tutorial you'll update related data.

For most relationships, this can be done by updating either foreign key fields or navigation properties.

Once the parent object is loaded, you just apply any changes to it and its children, and then call the method on the context once its all said and done.NET MVC 5 applications using the Entity Framework 6 Code First and Visual Studio 2013.For information about the tutorial series, see the first tutorial in the series.And with partial classes you can extend these components with your own methods easily if you need more advanced usage. There are a few key things that need to happen in each insert, update and delete situation that can get kind of tricky when you start having to deal with multiple related tables. But it is not just replacing an old value with a new one; to the already existing value in the column i have to add(SUM) the new value(the column is of type int). So my question is: 1.) If I only need to update Field1 of the Orders table for some rows based on a condition and Field2 for some other rows based on a different condition then what changes I need to do? In your case, I think this could get complex, because not only would the parent entity need to be attached, but all child entities as well.

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