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LINQ to Google Search Results

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 Google Search Data Provider.

This article demonstrates how to use LINQ to access Google Search tables through the CData ADO.NET Data Provider for Google Search. 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 Google Search Data Source".
  4. Enter your data source connection information.

    To search with a Google custom search engine, you need to set the CustomSearchId and ApiKey connection properties.

    To obtain the CustomSearchId property, sign into Google Custom Search Engine and create a new search engine.

    To obtain the ApiKey property, you must enable the Custom Search API in the Google API Console.

    Below is a typical connection string:

    CustomSearchId=def456;ApiKey=abc123;
  5. If saving your entity connection to App.Config, set an entity name. In this example we are setting GoogleSearchEntities 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:

GoogleSearchEntities context = new GoogleSearchEntities(); var videosearchQuery = from videosearch in context.VideoSearch select videosearch; foreach (var result in videosearchQuery) { Console.WriteLine("{0} {1} ", result.Id, result.Title); }

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