Connection Strings

Many trigger types require a conncetion string setting names to be supplied. For example using the Service Bus you may declare a queue function like this:

.Functions(functions => functions
    .ServiceBus("serviceBusConnectionString", serviceBus => serviceBus
        .QueueFunction<SendEmailCommand>(QueueName)
    )
);

An alternative approach is to rely on default connection string setting names (again using the Service Bus as an example but this applies to all trigger types):

.Functions(functions => functions
    .ServiceBus(serviceBus => serviceBus
        .QueueFunction<SendEmailCommand>(QueueName)
    )
);

The default connection string setting names are as follows (showed in a sample .settings.json):

{
    "Values": {
        "FUNCTIONS_WORKER_RUNTIME": "dotnet",
        "AzureWebJobsStorage": "",
        "AzureWebJobsDashboard": "",

        "storageConnectionString": "default azure storage connection string - queues, blob, table",
        "cosmosConnectionString": "default cosmos connection string",
        "serviceBusConnectionString": "default service bus connection string",
        "signalRConnectionString": "default signalR connection string"
    }
}

You can change the default setting names as shown in the following example (you don't have to set them all, just the ones you need):

public class FunctionAppConfiguration : IFunctionAppConfiguration
{
    public void Build(IFunctionHostBuilder builder)
    {
        builder
            .DefaultConnectionStringSettingNames(settingNames =>
                {
                    settingNames.Storage = "newStorageConnectionSettingName";
                    settingNames.CosmosDb = "newCosmosConnectionSettingName";
                    settingNames.ServiceBus = "newServiceBusConnectionSettingName";
                    settingNames.SignalR = "newSignalRConnectionSetingName";
                })
            .Functions(...);
    }
}