public async Task <BusinessEntities.File> UploadFile(BusinessEntities.Folder targetFolder, string fileNameWithExtension, System.IO.Stream fileStream)
{
// Get the targetFolder driveItem and the destination path (strip /drive/root: (12 characters) from the parent path string)
var targetFolderDriveItem = await this.graphAPI.GetDriveItemAsync(targetFolder.ID);
string destinationFolderPath = (targetFolderDriveItem.Name == "root" && targetFolderDriveItem.ParentReference.Name == null)
? ""
: targetFolderDriveItem.ParentReference.Path.Remove(0, 12) + "/" + Uri.EscapeUriString(targetFolderDriveItem.Name);
var uploadPath = destinationFolderPath + "/" + fileNameWithExtension;
// Attempt to upload the file
BusinessEntities.File uploadedFile = null;
try
{
var uploadedItem = await this.graphAPI.UploadDriveItemAsync(uploadPath, fileStream);
uploadedFile = new BusinessEntities.File(uploadedItem.Id, uploadedItem.Name, uploadedItem.Size, null);
}
catch (Exception exception)
{
throw new Exception(exception.Message);
}
return(uploadedFile);
}
// Private methods
private async void RequestAndGenerateChildrenEntitiesRecursively(BusinessEntities.Folder parentFolder, DriveItem expandedFolderDriveItem)
{
// Generate entities for its children
foreach (var childDriveItem in expandedFolderDriveItem.Children.CurrentPage)
{
// Folder
if (childDriveItem.Folder != null)
{
var newChildFolder = new BusinessEntities.Folder(childDriveItem.Id, childDriveItem.Name, childDriveItem.Size, parentFolder);
parentFolder.Folders.Add(newChildFolder);
// Generate its children when it is a Folder
if (expandedFolderDriveItem.Children != null && expandedFolderDriveItem.Children.CurrentPage != null)
{
var expandedChildDriveItem = await graphAPI.GetDriveItemAsync(childDriveItem.Id);
RequestAndGenerateChildrenEntitiesRecursively(newChildFolder, expandedChildDriveItem);
}
}
// File
else if (childDriveItem.File != null)
{
var newFile = new BusinessEntities.File(childDriveItem.Id, childDriveItem.Name, childDriveItem.Size, parentFolder);
parentFolder.Files.Add(newFile);
}
}
}
public async Task <System.IO.Stream> DownloadFile(BusinessEntities.File targetFile)
{
System.IO.Stream fileStream = null;
try
{
fileStream = await this.graphAPI.GetDriveItemContentAsync(targetFile.ID);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
return(fileStream);
}
public void AddAttachment(BusinessEntities.File file, bool specificVersion = true)
{
Attachments.Add(new Attachment {
File = file, SpecificVersion = true
});
}
