Sample: Create and retrieve table relationships

This sample shows how to create and retrieve table relationships. The following classes are used to create and retrieve the relationships:

• CreateOneToManyRequest class
• CreateManyToManyRequest class
• CanBeReferencedRequest class
• CanBeReferencingRequest class
• CanManyToManyRequest class
• RetrieveRelationshipRequest class

How to run this sample

1. Download or clone the Microsoft/PowerApps-Samples repo so that you have a local copy.
2. (Optional) Edit the dataverse/App.config file to define a connection string specifying the Microsoft Dataverse instance you want to connect to.
3. Open the sample solution in Visual Studio and press F5 to run the sample. After you specify a connection string in dataverse/App.config, any sample you run will use that connection information.

If you don't specify a connection string in dataverse/App.config file, a dialog opens each time you run the sample and you need to enter information about which Dataverse instance you want to connect to and which credentials you want to use. This dialog caches previous connections so that you can choose a previously used connection.

Those samples in this repo that require a connection to a Dataverse instance to run include a linked reference to the dataverse/App.config file.

What this sample does

This sample uses the classes listed earlier to create and retrieve table relationships.

How this sample works

To simulate the scenario described in What this sample does, the sample code performs the following steps:

Setup

Checks for the current version of the org.

Demonstrate

1. Use the CreateOneToManyRequest class to create a new one-to-many (1:N) relationship.
2. Use the CreateManyToManyRequest class to create a new many-to-many (N:N) relationship.
3. The EligibleCreateManyToManyRelationship method verifies whether tables can participate in an N:N relationship by using the CanBeReferencedRequest and CanBeReferencingRequest classes.
4. The RetrieveRelationshipRequest class retrieves the two tables relationships you previously created.

Clean up

Displays an option to delete the records you created in the Setup. The deletion is optional in case you want to examine the tables and data created by the sample. You can manually delete the records to achieve the same result.