Asp.net mvc 通过HttpClient get wierd name（=？utf-8？B？U…）向ASP.NET MVC控制器发送文件

当文件名具有特殊字符时，我将根据请求接收wierd文件名。文件[0]。文件名。比如“=？utf-8？B？U…”

要发送我正在执行的文件，请执行以下操作：

ProgressMessageHandler progress = new ProgressMessageHandler();
progress.HttpSendProgress += OnHttpSendProgress;

HttpClient client = HttpClientFactory.Create(progress);
client.DefaultRequestHeaders.TransferEncodingChunked = true;

MultipartFormDataContent content = new MultipartFormDataContent();
var fileContent = new StreamContent(new FileStream(fileInfo.FullName, FileMode.Open));
content.Add(fileContent, "file", fileInfo.Name);

HttpRequestMessage message = new HttpRequestMessage();
message.Method = HttpMethod.Post;
message.Content = content;
message.RequestUri = uri;

var resultado = await client.SendAsync(message, CancellationToken);

我做错了什么

我使用WebClient已有一段时间了：

WebClient client = new WebClient();
client.UploadProgressChanged += OnHttpSendProgress;
await client.UploadFileTaskAsync(uriBuilder.Uri, "POST", fileInfo.FullName);