WCF中使用Stream来传送文件，应该如何通知进度?

Question

用的是netTcpBinding现在的做法是在客户端用一个单独的线程来读取Stream的Position。能不能用回调方法来实现呢？

Answer 1

http://kb.cnblogs.com/a/1607823/

Answer 2

链接里那种方式显示进度条已经会了，现在是用Stream来传递的。
namespace FileTransfer.Service
{
    [MessageContract]
    public class FileStreamWrapper
    {
        [MessageHeader]
        public string FileName { get; set; }        [MessageBodyMember]
        public Stream Data { get; set; }
    }    [ServiceContract]
    public interface IFileService
    {
        [OperationContract]
        void Store(FileStreamWrapper file);
    }    public class FileService : IFileService
    {
        private static DirectoryInfo dir;
        public static DirectoryInfo FileDirectory
        {
            get
            {
                if (dir == null)
                {
                    dir = new DirectoryInfo(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Files"));
                    if (!dir.Exists) { dir.Create(); }
                }
                return dir;
            }
        }        public void Store(FileStreamWrapper file)
        {
            string path = Path.Combine(FileDirectory.FullName, file.FileName);
            FileStream fs = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.None);
            var src = file.Data;
            var buffer = new byte[4096];
            int bytesRead = 0;            while ((bytesRead = src.Read(buffer, 0, buffer.Length)) > 0)
            {
                fs.Write(buffer, 0, bytesRead);
                Console.WriteLine("WriteData: {0} - {1} - {2}", file.FileName, bytesRead, DateTime.Now);
            }
            fs.Close();
        }
    }
}