进度条用于指示上传或下载的进度。

进度条的完整代码请参见 GitHub。

下面的代码以PutObject方法为例，介绍如何使用进度条。

using System;
using System.IO;
using System.Text;
using Aliyun.OSS;
using Aliyun.OSS.Common;
namespace PutObjectProgress
{
    class Program
    {
        static void Main(string[] args)
        {
            Program.PutObjectProgress();
            Console.ReadKey();
        }
        public static void PutObjectProgress()
        {
            var endpoint = "<yourEndpoint>";
            var accessKeyId = "<yourAccessKeyId>";
            var accessKeySecret = "<yourAccessKeySecret>";
            var bucketName = "<yourBucketName>";
            var objectName = "<yourObjectName>";
            var localFilename = "<yourLocalFilename>";
            // 创建OssClient实例。
            var client = new OssClient(endpoint, accessKeyId, accessKeySecret);
            // 带进度条的上传。
            try
            {
                using (var fs = File.Open(localFilename, FileMode.Open))
                {
                    var putObjectRequest = new PutObjectRequest(bucketName, objectName, fs);
                    putObjectRequest.StreamTransferProgress += streamProgressCallback;
                    client.PutObject(putObjectRequest);
                }
                Console.WriteLine("Put object:{0} succeeded", objectName);
            }
            catch (OssException ex)
            {
                Console.WriteLine("Failed with error code: {0}; Error info: {1}. \nRequestID: {2}\tHostID: {3}",
                    ex.ErrorCode, ex.Message, ex.RequestId, ex.HostId);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Failed with error info: {0}", ex.Message);
            }
        }
        // 获取上传进度。
        private static void streamProgressCallback(object sender, StreamTransferProgressArgs args)
        {
            System.Console.WriteLine("ProgressCallback - Progress: {0}%, TotalBytes:{1}, TransferredBytes:{2} ",
                args.TransferredBytes * 100 / args.TotalBytes, args.TotalBytes, args.TransferredBytes);
        }
    }
}