Hi @Patrick Cowden,
You could try to use LargeFileUpload
class that comes as part of the Microsoft Graph C# SDK.
using var fileStream = File.OpenRead(filePath);
// Use properties to specify the conflict behavior
// using DriveUpload = Microsoft.Graph.Drives.Item.Items.Item.CreateUploadSession;
var uploadSessionRequestBody = new DriveUpload.CreateUploadSessionPostRequestBody
{
Item = new DriveItemUploadableProperties
{
AdditionalData = new Dictionary<string, object>
{
{ "@microsoft.graph.conflictBehavior", "replace" },
},
},
};
// Create the upload session
// itemPath does not need to be a path to an existing item
var myDrive = await graphClient.Me.Drive.GetAsync();
var uploadSession = await graphClient.Drives[myDrive?.Id]
.Items["root"]
.ItemWithPath(itemPath)
.CreateUploadSession
.PostAsync(uploadSessionRequestBody);
// Max slice size must be a multiple of 320 KiB
int maxSliceSize = 320 * 1024;
var fileUploadTask = new LargeFileUploadTask<DriveItem>(
uploadSession, fileStream, maxSliceSize, graphClient.RequestAdapter);
var totalLength = fileStream.Length;
// Create a callback that is invoked after each slice is uploaded
IProgress<long> progress = new Progress<long>(prog =>
{
Console.WriteLine($"Uploaded {prog} bytes of {totalLength} bytes");
});
try
{
// Upload the file
var uploadResult = await fileUploadTask.UploadAsync(progress);
Console.WriteLine(uploadResult.UploadSucceeded ?
$"Upload complete, item ID: {uploadResult.ItemResponse.Id}" :
"Upload failed");
}
catch (ODataError ex)
{
Console.WriteLine($"Error uploading: {ex.Error?.Message}");
}
Please refer to the following document https://learn.microsoft.com/en-us/graph/sdks/large-file-upload?context=graph%2Fapi%2F1.0&view=graph-rest-1.0&tabs=csharp
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