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LINQ to Azure Table Data

LINQ provides general-purpose query facilities in .NET Framework 3.0 and above and provides one easy way to programmatically access data through from CData ADO.NET Data Providers. This example uses LINQ to access information from the Azure Table Data Provider.

This article demonstrates how to use LINQ to access Azure Table tables through the CData ADO.NET Data Provider for Azure Table. To do this you will LINQ to Entity Framework, which is used to generate the connection and can be used with any CData ADO.NET Data Providers to access data via 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 Azure Table Data Source".
  4. Enter your data source connection information.

    Specify your AccessKey and your Account to connect. Set the Account property to the Storage Account Name and set AccessKey to one of the Access Keys. Either the Primary or Secondary Access Keys can be used. To obtain these values, navigate to the Storage Accounts blade in the Azure portal. You can obtain the access key by selecting your account and clicking Access Keys in the Settings section.

    Below is a typical connection string:

    AccessKey=myAccessKey;Account=myAccountName;
  5. If saving your entity connection to App.Config, set an entity name. In this example we are setting AzureTablesEntities 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 , update, delete, and insert commands. For example:

AzureTablesEntities context = new AzureTablesEntities(); var northwindproductsQuery = from northwindproducts in context.NorthwindProducts select northwindproducts; foreach (var result in northwindproductsQuery) { Console.WriteLine("{0} {1} ", result.Id, result.Name); }

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