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This will also update the points that the contact holds. UpdateContactWithRelatedRewardsClaimed(contact); The following code example shows how to remove a rewards claimed entity. This will also update the points that the contact holds. UpdateContactWithRelatedRewardsClaimed(contact); Handling Updates in an N-Tier Solution by Using the Entity Framework 10-15 Demonstration: Change Tracking with Self-Tracking Entities in an N-Tier Solution Key Points • An end-to-end walkthrough of a solution that uses STEs.

Run the application. Handling Updates in an N-Tier Solution by Using the Entity Framework 7. 10-27 Close the application and then close Visual Studio. Question: In this example, the update logic requires you to retrieve the original version of the rewards claimed entity from the database to get the original value of the PointsUsed property. How can you avoid having to query for this information during the update? 10-28 Developing Data Access Solutions with Microsoft® Visual Studio® 2010 Change Tracking with Data Transfer Objects in an N-Tier Solution Key Points This topic demonstrates how to use DTOs to implement the same functionality in the Adventure Works application that you saw in the previous two topics.

Demonstration Steps 1. bat to configure IIS. 2. bat as an administrator to configure the virtual directory in IIS for the application. 3. Start Visual Studio 2010 as administrator. 4. Open the RewardsDTO solution. 5. Review the code in the solution. 6. Run the application. 10-38 Developing Data Access Solutions with Microsoft® Visual Studio® 2010 7. Close the application and then close Visual Studio. Question: What is the purpose of the attributes that are used in the DTO classes? Handling Updates in an N-Tier Solution by Using the Entity Framework 10-39 Connecting to the Database Key Points In an n-tier application, the data access layer must connect to the database to retrieve data and to persist changes.

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MOC 10265a DMOC Developing Data Access Solutions With Visual Studio 2010 Trainer WorkBook Vol2


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