LINQ to Guru Data

This article illustrates using LINQ to access tables within the Guru via the CData ADO.NET Data Provider for Guru. 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 Guru Data Source".

4. Enter your data source connection information.

   Start by setting the Profile connection property to the location of the Guru Profile on disk (e.g. C:\profiles\Guru.apip). Next, set the ProfileSettings connection property to the connection string for Guru (see below).

   Guru API Profile Settings

   In Guru, navigate to Settings > API and click Create New API Token. Use your email address as the User and the generated token as the Password.

   Below is a typical connection string:

   Profile=C:\profiles\Guru.apip;ProfileSettings='User=your_email;Password=your_api_token';


5. If saving your entity connection to App.Config, set an entity name. In this example we are setting APIEntities 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:

APIEntities context = new APIEntities();

var analyticsQuery = from analytics in context.Analytics
  select analytics;

foreach (var result in analyticsQuery) {
  Console.WriteLine("{0} {1} ", result.Id, result.User);
}

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