文件未按预期在 Asp.Net Core controller 中流式传输

Question

I am trying to upload file to my onedrive, getting the file as expected seems streaming not process accordingly, could anyone please point me the problem.

Code snippet:

public async Task<IActionResult> UploadFileOnFolder(IFormFile uploadedFile, string folderName)
{
    try
    {
        if (uploadedFile.Length > 0)
        {
            dynamic response;
            var fileName = ContentDispositionHeaderValue.Parse(uploadedFile.FileName).FileName.Trim('"');

            using var stream = new System.IO.MemoryStream(Encoding.UTF8.GetBytes(fileName));
                response =  await _graphServiceClient.Me.Drive.Items[folderName].Content
                                  .Request()
                                  .PutAsync<DriveItem>(stream);

            ViewData["FileUploadInfo"] = response;
        }
        else
        {
            ViewData["message"] = "Sorry Upload failed! Please check your file!";
        }
     }
     catch (Exception ex)
     {
         ViewData["message"] = ex.Message;
     }

     return RedirectToAction("RecentDirveInfo");
}

Note: I am following this official document.

Answer 1

I am not sure about the APi, but I do know you are trying to upload the file name as the file. You will likely want to use uploadedFile.OpenReadStream and instead pass that into PutAsync

Opens the request stream for reading the uploaded file.

using var stream = uploadedFile.OpenReadStream();
response =  await _graphServiceClient.Me.Drive.Items[folderName].Content
                 .Request()
                 .PutAsync<DriveItem>(stream);

Answer 2

Try the code below:

public async Task<IActionResult> UploadFileOnFolder(IFormFile uploadedFile, string folderName)
        {
            try
            {

                if (uploadedFile.Length > 0)
                {
                    dynamic response;

                    var fileName = uploadedFile.FileName;
                    using var stream = uploadedFile.OpenReadStream();
                    response = await _graphServiceClient.Me.Drive.Root.ItemWithPath(folderName +"/" + fileName).Content.Request().PutAsync<DriveItem>(stream);
                        
                    ViewData["FileUploadInfo"] = response;
                }
                else
                {
                    ViewData["message"] = "Sorry check your file!";
                }

            }
            catch (Exception ex)
            {

                ViewData["message"] = ex.Message;
            }
            return RedirectToAction("RecentDirveInfo");
        }

I have tested it on my side it works for me perfectly:

Btw, make sure you have granted Delegated Permissions below to your Azure AD application before you run this code:

Files.ReadWrite, Files.ReadWrite.All, Sites.ReadWrite.All