WCF 客户端上传文件到服务器端的问题

[JokerChenjb]

现在我编写了个简单的基于WCF上传文件的小例程，出现的问题是不能成功进行上传，说是数据流不可读，有大神能解答不。

程序如下：
接口：

namespace file
{
    // 注意: 使用“重构”菜单上的“重命名”命令，可以同时更改代码和配置文件中的接口名“Ifile”。
    [ServiceContract]
    public interface Ifile
    {
        [OperationContract]
        void UpLoadFile(UpLoadFileMessage request);
    }

    [MessageContract]
    public class UpLoadFileMessage
    {
        [MessageHeader]
        public string FileName { get; set; }
        [MessageBodyMember]
        public FileStream FileData { get; set; }
    }
}

实现：

        public void UpLoadFile(UpLoadFileMessage request)
        {
            string UploadFolder = "D:\\";
            string FileName = request.FileName;
            Stream sourceStream = request.FileData;
            FileStream targetStream = null;

            if (!sourceStream.CanRead)
            {
                throw new Exception("数据流不可读！");
            }


            if (!Directory.Exists(UploadFolder))
            {
                Directory.CreateDirectory(UploadFolder);
            }

            string filePath = UploadFolder + FileName;
            using (targetStream = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Write))
            {
                const int bufferLen = 4096;
                byte[] buffer = new byte[bufferLen];
                int count = 0;
                while ((count = sourceStream.Read(buffer, 0, bufferLen)) > 0)
                {
                    targetStream.Write(buffer, 0, count);
                }
                targetStream.Flush();
                targetStream.Close();
                sourceStream.Close();
            }
        }

配置：

<configuration>
	<system.serviceModel>
		<bindings>
			<basicHttpBinding>
				<binding name="MyBinding" transferMode="Streamed" messageEncoding="Mtom" maxBufferSize="524288000" maxReceivedMessageSize="524288000" sendTimeout="00:10:00"/>
			</basicHttpBinding>
		</bindings>
		<behaviors>
			<serviceBehaviors>
				<behavior name="MyBehavior">
          <dataContractSerializer maxItemsInObjectGraph="524288000"/>
					<serviceMetadata httpGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="true"/>
				</behavior>
			</serviceBehaviors>
		</behaviors>
		<services>
			<service name="file.file" behaviorConfiguration="MyBehavior">
				<endpoint address="" binding="basicHttpBinding" bindingConfiguration="MyBinding" contract="file.Ifile"/>
				<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
			</service>
		</services>
	</system.serviceModel>
	<system.web>
		<compilation debug="true"/></system.web></configuration>

客户端：

 private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog opd = new OpenFileDialog();
            if(opd.ShowDialog()==DialogResult.OK)
            {
                textBox1.Text = opd.FileName;
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            string filepath = textBox1.Text;
            string FileName = Path.GetFileName(filepath);
            FileStream FileData = new FileStream(filepath, FileMode.Open, FileAccess.Read);
            file.IfileClient client = new file.IfileClient();
            try
            {
                client.UpLoadFileAsync(FileName, FileData);
                MessageBox.Show("成功！");
            }
            catch
            {
                MessageBox.Show("错误！");
            }

有谁知道原因么？？？
还有个问题，如果使用的绑定是wsHttpBinding，如何进行文件传输？