C# HttpClient 上传大文件带进度

在Httpclient 上传文件时需要显示进度，需要添加 ProgressMessageHandler 在NuGet中添加引用
Microsoft.AspNet.WebApi.Client 一下是全部代码包括文件上传

private async void button2_Click(object sender, EventArgs e)
      {
          HttpClientHandler handler = new HttpClientHandler();
          ProgressMessageHandler progressMessageHandler = new ProgressMessageHandler(handler);
          progressMessageHandler.HttpSendProgress += ProgressMessageHandler_HttpSendProgress;
          var httpClient = new HttpClient(progressMessageHandler);
          httpClient.Timeout = Timeout.InfiniteTimeSpan;
          var url = "http://10.141.40.176:5236/main/Uploadfile";
          var content = new MultipartFormDataContent();
          content.Add(new StringContent("ulami"), "Department");
          content.Add(new StringContent("1"), "taskname");
          content.Add(new StringContent("false"), "cover");
         // StringContent loginContent = new StringContent("{\"username\":\"admin\",\"password\":\"123456\"}", Encoding.UTF8, "application/json");
          var filepath = textBox1.Text;//97.6MB
          using var fileStream = new FileStream(filepath, FileMode.Open, FileAccess.Read);
          using var streamContent = new StreamContent(fileStream, 102400);
          content.Add(streamContent, "file", "测试文件1.ppt");
          var response = await httpClient.PostAsync(url, content);
          var str = await response.Content.ReadAsStringAsync();
          textBox2.Text = str;
          //    try
          //    {
          //        //上传服务器的地址（web服务）
          //        string address = "http://10.141.40.176:7245/main/dwj";
          //        //上传后文件保存的名称
          //        string saveName = DateTime.Now.ToString("yyyyMMddHHmmss");
          //        int count = FileUpload.UpLoad_Request(address, filePath, saveName,progressBar1);
          //        if (count > 0)
          //        {
          //            MessageBox.Show("上传文件成功！");
          //        }
          //        else
          //        {
          //            MessageBox.Show("上传文件失败！");
          //        }
          //    }
          //    catch (Exception ex)
          //    {
 
          //        Console.WriteLine(ex.Message);
          //    }
      }
 
      private void ProgressMessageHandler_HttpSendProgress(object sender, HttpProgressEventArgs e)
      {
          Console.WriteLine(e.ProgressPercentage + "%");
      }