重温WCF之流与文件传输（七）

 [MessageContract]
    public class TransferFileMessage
    {
        [MessageHeader]
        public string FileName; //文件名  
        [MessageBodyMember]
        public Stream FileStream; //文件流  
    }
    [MessageContract]
    public class ResultMessage
    {
        [MessageHeader]
        public string ErrorMessage;
        [MessageBodyMember]
        public bool IsSuccessed;
    }  

    [ServiceContract]
    public interface IService
    {
        //消息契约作为传入参数，则只能有一个参数，返回值为void
        //如果需要返回值，则必须返回一个消息契约
        [OperationContract]
        ResultMessage UploadFile(TransferFileMessage fileMessage);

    }

    public class Service : IService
    {
        public ResultMessage UploadFile(TransferFileMessage fileMessage)
        {
            ResultMessage msg = new ResultMessage();
            try
            {
                using (FileStream outputStream = new FileStream(fileMessage.FileName,FileMode.OpenOrCreate))
                {
                    fileMessage.FileStream.CopyTo(outputStream);
                    outputStream.Flush();
                    msg.IsSuccessed = true;
                    Console.WriteLine("在{0}接收到客户端发送的流，已保存到{1}。", DateTime.Now.ToLongTimeString(), fileMessage.FileName);  
                }
            }
            catch (Exception ex)
            {
                msg.ErrorMessage = ex.Message;  
                msg.IsSuccessed = false;
            }
            return msg;
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            using (ServiceHost host = new ServiceHost(typeof(Service)))
            {
                BasicHttpBinding bingding = new BasicHttpBinding();
                // 启用流模式  
                bingding.TransferMode = TransferMode.StreamedRequest;
                //缓存区的最大值
                bingding.MaxBufferSize = 1024;
                // 接收消息的最大范围为500M  
                bingding.MaxReceivedMessageSize = 500*1024*1024;
                host.AddServiceEndpoint(typeof(IService), bingding, "http://127.0.0.1:8888/service1");
                ServiceMetadataBehavior behavior = new ServiceMetadataBehavior();
                behavior.HttpGetEnabled = true;
                behavior.HttpGetUrl = new Uri("http://127.0.0.1:8888/service");  //httpGetUrl客户端引用的地址
                host.Description.Behaviors.Add(behavior);
                host.Opened += delegate
                {
                    Console.WriteLine("服务已启动");
                    Console.ReadKey();
                };
                host.Open();
            }
        }
    }

private void button1_Click(object sender, EventArgs e)
        {

            OpenFileDialog ofd = new OpenFileDialog();
            if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                label1.Text = ofd.FileName;
            }

        }

        private async void button2_Click(object sender, EventArgs e)
        {
            if (!File.Exists(label1.Text))
            {
                return;
            }
            using (FileStream fs = new FileStream(label1.Text, FileMode.Open, FileAccess.Read))
            {
                using (ServiceClient client = new ServiceClient())
                {
                   var result = await client.UploadFileAsync(Path.GetFileName(this.label1.Text),fs);
                   if (result.IsSuccessed)
                    {
                        MessageBox.Show("上传完成");
                    }
                }
            }
          
        }