doc_create.cs

[FunctionName("CreateAggregateDocument")]
public static IActionResult Run(
    [HttpTrigger(AuthorizationLevel.Function, "post", Route = null)] HttpRequest req,
    [CosmosDB(databaseName: "namesdata", collectionName: "firstletterstrend",
        ConnectionStringSetting = "CosmosDbConnection")]out dynamic document,
    ILogger log)
{
    var eventDataContents = req.ReadAsStringAsync().GetAwaiter().GetResult();
    
    // create the collated event data into our document db
    document = new {
        id = Guid.NewGuid(),
        timestamp = DateTime.UtcNow,
        eventData = JArray.Parse(eventDataContents)
    };
    
    return new OkObjectResult("received");
}