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LINQ to Redis Data

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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 Redis Data Provider.

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

  4. Enter your data source connection information.

    Set the following connection properties to connect to a Redis instance:

    • Server: Set this to the name or address of the server your Redis instance is running on. You can specify the port in Port.
    • Password: Set this to the password used to authenticate with a password-protected Redis instance , using the Redis AUTH command.

    Set UseSSL to negotiate SSL/TLS encryption when you connect.

    Below is a typical connection string:

    Server=127.0.0.1;Port=6379;Password=myPassword;
  5. If saving your entity connection to App.Config, set an entity name. In this example we are setting RedisEntities 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:

RedisEntities context = new RedisEntities(); var customersQuery = from customers in context.Customers select customers; foreach (var result in customersQuery) { Console.WriteLine("{0} {1} ", result.Id, result.City); }

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