I have a WCF Web Service with basicHTTPBinding , the server side the transfer mode is streamedRequest as the client will be sending us large file in the form of memory stream.

But on client side when i use transfer mode as streamedRequest its giving me a this errro "The remote server returned an error: (400) Bad Request" And when i look in to trace information , i see this as the error message Exception: There is a problem with the XML that was received from the network. See inner exception for more details.

InnerException: The body of the message cannot be read because it is empty.

I am able to send up to 5MB of data using trasfermode as buffered , but it will effect the performance of my web service in the long run , if there are many clients who are trying to access the service in buffered transfer mode.

SmartConnect.Service1Client Serv = new SmartConnectClient.SmartConnect.Service1Client();
SmartConnect.OrderCertMailResponse OrderCert = new SmartConnectClient.SmartConnect.OrderCertMailResponse();
OrderCert.UserID = "abcd";
OrderCert.Password = "7a80f6623";
OrderCert.SoftwareKey = "90af1";  
string applicationDirectory = @"\\inid\utty\Bran";
byte[] CertMail = File.ReadAllBytes(applicationDirectory + @"\5mb_test.zip");
MemoryStream str = new MemoryStream(CertMail);

//OrderCert.Color = true;
//OrderCert.Duplex = false;        
//OrderCert.FirstClass = true;
//OrderCert.File = str;
//OrderCert.ReturnAddress1 = "Test123";
//OrderCert.ReturnAddress2 = "Test123";
//OrderCert.ReturnAddress3 = "Test123";
//OrderCert.ReturnAddress4 = "Test123";
OrderCert.File = str;

//string OrderNumber = "";
//string Password = OrderCert.Password;
//int ReturnCode = 0;
//string ReturnMessage = "";
//string SoftwareKey = OrderCert.SoftwareKey;
//string UserID = OrderCert.UserID;
//OrderCert.File = str;

MemoryStream FileStr = str;
Serv.OrderCertMail(OrderCert);

// Serv.OrderCertMail(ref  OrderNumber, ref Password, ref ReturnCode, ref ReturnMessage, ref SoftwareKey, ref  UserID, ref FileStr );
lblON.Text = OrderCert.OrderNumber;

Serv.Close();

// My Web Service - Service Contract

[OperationContract] OrderCertMailResponse OrderCertMail(OrderCertMailResponse OrderCertMail);

[MessageContract]
    public class OrderCertMailResponse
    {
        string userID = "";
        string password = "";
        string softwareID = "";
        MemoryStream file = null;
        //MemoryStream str = null; 

        [MessageHeader]
        //[DataMember]
        public string UserID
        {
            get { return  userID; }
            set { userID = value; }
        }

        [MessageHeader]
        //[DataMember]
        public string Password
        {
            get { return  password; }
            set { password = value; }
        }

        [MessageHeader]
        //[DataMember]
        public string SoftwareKey
        {
            get { return softwareID; }
            set { softwareID = value; }
        }

        [MessageBodyMember]
        // [DataMember]
        public MemoryStream File
        {
            get { return file; }
            set { file = value; }
        }


        [MessageHeader]
        //[DataMember]
        public string ReturnMessage;

        [MessageHeader]
        //[DataMember]
        public int ReturnCode;

        [MessageHeader]
        public string OrderNumber;



        //// Control file fields
        //[MessageHeader]
        ////[DataMember]
        //public string ReturnAddress1;

        //[MessageHeader]
        ////[DataMember]
        //public string ReturnAddress2;

        //[MessageHeader]
        ////[DataMember]
        //public string ReturnAddress3;

        //[MessageHeader]
        ////[DataMember]
        //public string ReturnAddress4;

        //[MessageHeader]
        ////[DataMember]
        //public bool FirstClass;


        //[MessageHeader]
        ////[DataMember]
        //public bool Color;

        //[MessageHeader]
        ////[DataMember]
        //public bool Duplex;

   }





    [ServiceBehavior(IncludeExceptionDetailInFaults = true)]
    public class Service1 : IService1
    {


        public OrderCertMailResponse OrderCertMail(OrderCertMailResponse OrderCertMail)
        {

            OrderService CertOrder = new OrderService();
            ClientUserInfo Info = new ClientUserInfo();
            ControlFileInfo Control = new ControlFileInfo();

            //Info.Password = "f2496623";              // hard coded password for development testing purposes
            //Info.SoftwareKey = "6dbb71";       // hard coded  software key this is a developement software key
            //Info.UserName = "sdfs";      // hard coded UserID - for testing
            Info.UserName = OrderCertMail.UserID.ToString();
            Info.Password = OrderCertMail.Password.ToString();
            Info.SoftwareKey = OrderCertMail.SoftwareKey.ToString();

            //Control.ReturnAddress1 = OrderCertMail.ReturnAddress1;
            //Control.ReturnAddress2 = OrderCertMail.ReturnAddress2;
            //Control.ReturnAddress3 = OrderCertMail.ReturnAddress3;
            //Control.ReturnAddress4 = OrderCertMail.ReturnAddress4;
            //Control.CertMailFirstClass = OrderCertMail.FirstClass;
            //Control.CertMailColor = OrderCertMail.Color;
            //Control.CertMailDuplex = OrderCertMail.Duplex;


            //byte[] CertFile = new byte[0];
            //byte[] CertFile = null;

            //string applicationDirectory = @"\\intrepid\utility\Bryan";
            // byte[] CertMailFile = File.ReadAllBytes(applicationDirectory + @"\3mb_test.zip"); 
             //MemoryStream str = new MemoryStream(CertMailFile);
            OrderCertMailResponseClass OrderCertResponse = CertOrder.OrderCertmail(Info,Control,OrderCertMail.File);
            OrderCertMail.ReturnMessage = OrderCertResponse.ReturnMessage.ToString();
            OrderCertMail.ReturnCode = Convert.ToInt32(OrderCertResponse.ReturnCode.ToString());
            OrderCertMail.OrderNumber = OrderCertResponse.OrderNumber;            
            return OrderCertMail;

        }