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Rapidly create and deploy powerful .NET applications that integrate with Amazon Marketplace data including InventoryItems, Orders, Products, and more!

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LINQ to Amazon Marketplace Data


LINQ offers versatile querying capabilities within the .NET Framework (v3.0+), offering a straightforward method for programmatic data access through CData ADO.NET Data Providers. In this article, we demonstrate the use of LINQ to retrieve information from the Amazon Marketplace Data Provider.

This article illustrates using LINQ to access tables within the Amazon Marketplace via the CData ADO.NET Data Provider for Amazon Marketplace. To achieve this, we will use LINQ to Entity Framework, which facilitates the generation of connections and can be seamlessly employed with any CData ADO.NET Data Providers to access data through LINQ.

See the help documentation for a guide to setting up an EF 6 project to use the provider.

  1. In a new project in Visual Studio, right-click on the project and choose to add a new item. Add an ADO.NET Entity Data Model.
  2. Choose EF Designer from Database and click Next.
  3. Add a new Data Connection, and change your data source type to "CData Amazon Marketplace Data Source".

  4. Enter your data source connection information.

    To connect to the Amazon Marketplace Webservice (MWS), AWSAccessKeyId, MWSAuthToken, AWSSecretKey and SellerId are required. You can optionally set the Marketplace property. For more information on obtaining values for these properties, refer to the Help documentation.

    Below is a typical connection string:

    AWS Access Key Id=myAWSAccessKeyId;AWS Secret Key=myAWSSecretKey;MWS Auth Token=myMWSAuthToken;Seller Id=mySellerId;Marketplace=United States;
  5. If saving your entity connection to App.Config, set an entity name. In this example we are setting AmazonMarketplaceEntities as our entity connection in App.Config.
  6. Enter a model name and select any tables or views you would like to include in the model.

Using the entity you created, you can now perform select commands. For example:

AmazonMarketplaceEntities context = new AmazonMarketplaceEntities(); var ordersQuery = from orders in context.Orders select orders; foreach (var result in ordersQuery) { Console.WriteLine("{0} {1} ", result.Id, result.AmazonOrderId); }

See "LINQ and Entity Framework" chapter in the help documentation for example queries of the supported LINQ.