Sample: Execute multiple requests in transaction
This sample shows how to use a single web method call to execute all message requests in a collection as part of a single database transaction. It is a common requirement in business applications to coordinate changes of multiple records in the system so that either all the data changes succeed, or none of them do. In database terms, this is known as executing multiple operations in a single transaction with the ability to roll back all data changes should any one operation fail.
You can execute two or more organization service requests in a single database transaction using the ExecuteTransactionRequest message request.
You can download the sample from here.
How to run this sample
- Download or clone the Samples repo so that you have a local copy.
- (Optional) Edit the cds/App.config file to define a connection string specifying the Microsoft Dataverse instance you want to connect to.
- Open the sample solution in Visual Studio and press F5 to run the sample. After you specify a connection string in cds/App.config, any sample you run will use that connection information.
If you do not specify a connection string in cds/App.config file, a dialog will open each time you run the sample and you will need to enter information about which Dataverse instance you want to connect to and which credentials you want to use. This dialog will cache 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 will include a linked reference to the cds/App.config file.
What this sample does
The ExecuteTransactionRequest message is intended to be used in a scenario where it contains data that is needed to execute one or more message requests in a single database transaction, and optionally return a collection of results.
How this sample works
In order to simulate the scenario described in What this sample does, the sample will do the following:
Setup
Checks for the current version of the org.
Demonstrate
- The
ExecuteTransactionRequestmethod creates theExecuteTransactionRequestobject. - The
OrganizationRequestCollectionmethod creates an empty organization request collection. - The
CreateRequestmethod is added for each table to the request collection.
Clean up
Display an option to delete the records 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.