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LINQ to DocuSign 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 DocuSign Data Provider.

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

    To connect to DocuSign, set the following connection properties:

    • UseSandbox: indicates whether current user account is sandbox or not (FALSE by default)
    • AccountId (optional): set it in the connection string if you have access to multiple Account Ids

    Authenticating to DocuSign

    DocuSign uses the OAuth authentication standard. To authenticate using OAuth, you will need to create an app to obtain the OAuthClientId, OAuthClientSecret, and CallbackURL connection properties. See the Help documentation more information.

    Below is a typical connection string:

    OAuthClientId=MyClientId; OAuthClientSecret=MyClientSecret; CallbackURL=http://localhost:33333; InitiateOAuth=GETANDREFRESH
  5. If saving your entity connection to App.Config, set an entity name. In this example we are setting DocuSignEntities 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:

DocuSignEntities context = new DocuSignEntities(); var documentsQuery = from documents in context.Documents select documents; foreach (var result in documentsQuery) { Console.WriteLine("{0} {1} ", result.Id, result.DocumentId); }

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