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LINQ to Salesforce 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 Salesforce Data Provider.

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

    There are several authentication methods available for connecting to Salesforce: Login, OAuth, and SSO. The Login method requires you to have the username, password, and security token of the user.

    If you do not have access to the username and password or do not wish to require them, you can use OAuth authentication.

    SSO (single sign-on) can be used by setting the SSOProperties, SSOLoginUrl, and TokenUrl connection properties, which allow you to authenticate to an identity provider. See the "Getting Started" chapter in the help documentation for more information.

    Below is a typical connection string:

    User=username;Password=password;SecurityToken=Your_Security_Token;
  5. If saving your entity connection to App.Config, set an entity name. In this example we are setting SalesforceEntities 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:

SalesforceEntities context = new SalesforceEntities(); var accountQuery = from account in context.Account select account; foreach (var result in accountQuery) { Console.WriteLine("{0} {1} ", result.Id, result.Industry); }

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