public static Presentation Presentation(ExistingPresentation presentation)
{
switch (presentation)
{
case ExistingPresentation.TheHitchhikersGuideToTheCosoms:
return(TheHitchhikersGuideToTheCosmos());
case ExistingPresentation.GraphingYourWayThroughTheCosoms:
return(GraphingYourWayThroughTheCosoms());
case ExistingPresentation.EventDrivenArchitectureInTheCloud:
return(EventDrivenArchitectureInTheCloud());
default:
return(null);
}
}
/// <summary>
/// Add the specified existing presentation to the database (if it does not already exists.
/// </summary>
/// <param name="existingPresentation">Identifier of the existing presentation to be added to the database.</param>
private async Task AddPresentation(ExistingPresentation existingPresentation)
{
Presentation presentation = Generate.Presentation(existingPresentation);
try
{
// Read the item to see if it exists. ReadItemAsync will throw an exception if the item does not exist and return status code 404 (Not found).
ItemResponse <Presentation> presentationResponse = await this.container.ReadItemAsync <Presentation>(presentation.Id, new PartitionKey(presentation.OwnerEmailAddress));
Console.WriteLine("Item in database with id: {0} already exists\n", presentationResponse.Resource.Id);
}
catch (CosmosException ex) when(ex.StatusCode == HttpStatusCode.NotFound)
{
// Create an item in the container representing the presentation. Note we provide the value of the partition key for this item, which is "Andersen"
ItemResponse <Presentation> presentationResponse = await this.container.CreateItemAsync <Presentation>(presentation, new PartitionKey(presentation.OwnerEmailAddress));
// Note that after creating the item, we can access the body of the item with the Resource property off the ItemResponse.
// We can also access the RequestCharge property to see the amount of RUs consumed on this request.
Console.WriteLine("Created item in database with id: {0} Operation consumed {1} RUs.\n", presentationResponse.Resource.Id, presentationResponse.RequestCharge);
}
}
