Onedrive Graph Upload

WPF Client for uploading files to onedrive using Microsoft Graph .Net SDK Below you can find the upload code.

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private static async Task UploadFilesToOneDrive(string fileName, string filePath, GraphServiceClient graphClient)
{
	try
	{
		var uploadPath = $"/CodeUploads/{DateTime.Now.ToString("ddMMyyyy")}/" + Uri.EscapeUriString(fileName);


		using (var stream = new FileStream(filePath, FileMode.Open))
		{
			if (stream != null)
			{
				var fileSize = ByteSize.FromBytes(stream.Length);
				if (fileSize.MegaBytes > 4)
				{
					var session = await graphClient.Drive.Root.ItemWithPath(uploadPath).CreateUploadSession().Request().PostAsync();
					var maxSizeChunk = 320 * 4 * 1024;
					var provider = new ChunkedUploadProvider(session, graphClient, stream, maxSizeChunk);
					var chunckRequests = provider.GetUploadChunkRequests();
					var exceptions = new List<Exception>();
					var readBuffer = new byte[maxSizeChunk];
					DriveItem itemResult = null;
					//upload the chunks
					foreach (var request in chunckRequests)
					{
						// Do your updates here: update progress bar, etc.
						// ...
						// Send chunk request
						var result = await provider.GetChunkRequestResponseAsync(request, readBuffer, exceptions);

						if (result.UploadSucceeded)
						{
							itemResult = result.ItemResponse;
						}
					}

					// Check that upload succeeded
					if (itemResult == null)
					{
						await UploadFilesToOneDrive(fileName, filePath, graphClient);
					}
				}
				else
				{
					await graphClient.Drive.Root.ItemWithPath(uploadPath).Content.Request().PutAsync<DriveItem>(stream);
				}
			}
		}
	}
	catch
	{
		throw;
	}
}

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