WCF-Message Contract Example

// Interface

    [ServiceContract]

    public interface IMessageContract

    {

        [OperationContract]

        FundDetail getFunds();       

    }

// Classes

    [MessageContract]

    [KnownType(typeof(Pricedetail))] 

    public class FundDetail

    {

        private int _FundID;

        private string _FundName;

       [MessageHeader]

        public int FundID_Master

        {

            get { return _FundID; }

            set { _FundID = value; }

        }

        [MessageHeader]

        public string FundName

        {

            get { return _FundName; }

            set { _FundName = value; }

        }

       

        [MessageHeader]

        public Pricedetail[] records;

    

    }

    [DataContract]

    public class Pricedetail

    {

        private int _PriceID;

        private decimal _Offer;

        [DataMember(Name = "PriceIDNo", Order = 1)]

        public int PriceID

        {

            get { return _PriceID; }

            set { _PriceID = value; }

        }

       [DataMember(Name = "OfferPrice", Order = 2)]

        public decimal Offer

        {

            get { return _Offer; }

            set { _Offer = value; }

        }

    }

Service

public class MessageContract : IMessageContract

    {

       

         SqlConnection Conn;

         public MessageContract()

        {

            Conn = new SqlConnection("Connection String");

        }

        public FundDetail getFunds()

        {

            List<Pricedetail> fundPriceList = new List<Pricedetail>();

            Pricedetail dc = new Pricedetail();

            Conn.Open();

            SqlCommand Cmd = new SqlCommand("Select top 3 PriceID,offer from tblPrice where FundID=" + 7 + " order by Pricedate desc ", Conn);

            SqlDataReader dr = Cmd.ExecuteReader();

            while (dr.Read())

            {

                dc.PriceID = Convert.ToInt32(dr["PriceID"].ToString());

                dc.Offer = Convert.ToDecimal(dr["offer"].ToString());

               fundPriceList.Add(dc);

            }

            dr.Close();

            FundDetail _objFund = new FundDetail();

            _objFund.FundID_Master = 7;

            _objFund.FundName = "US Global Fund";

            _objFund.records = fundPriceList.ToArray();

            return _objFund;  

        }

    }

WCFTESTCLIENT OutPut:

XML :  In this case, the entire array is serialized as one element that is, one header with multiple child elements.

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">

  <s:Header>

    <h:FundID_Master xmlns:h="http://tempuri.org/">7</h:FundID_Master>

    <h:FundName xmlns:h="http://tempuri.org/">US Global Fund</h:FundName>

     

    <h:Pricedetails xmlns:h="http://www.Example.com" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">

     

     <Pricedetail xmlns="http://schemas.datacontract.org/2004/07/MessageContractDB">

        <OfferPrice>2.486</OfferPrice>

        <PriceIDNo>20980</PriceIDNo>

      </Pricedetail>

     

     <Pricedetail xmlns="http://schemas.datacontract.org/2004/07/MessageContractDB">

        <OfferPrice>2.486</OfferPrice>

        <PriceIDNo>20980</PriceIDNo>

      </Pricedetail>

     

      <Pricedetail xmlns="http://schemas.datacontract.org/2004/07/MessageContractDB">

        <OfferPrice>2.486</OfferPrice>

        <PriceIDNo>20980</PriceIDNo>

      </Pricedetail>

    </h:Pricedetails>

  </s:Header>

  <s:Body>

    <FundDetail xmlns="http://tempuri.org/" />

  </s:Body>

</s:Envelope>

Next  Step  :  Change  Funddetail  Class Member

From  =  [MessageHeader(Name = "Pricedetails", Namespace = "http://www.Example.mu")]

                 public Pricedetail[] records;

To     = [MessageBodyMember(Name = "Pricedetails", Namespace = "http://www.Example.mu")]

             public Pricedetail[] records;

Run your service in WCFTESTCLIENT  and get XML

XML :  you can see below Body part separated from header part

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">

  <s:Header>

    <h:FundID_Master xmlns:h="http://tempuri.org/">7</h:FundID_Master>

    <h:FundName xmlns:h="http://tempuri.org/">US Global Fund</h:FundName>

  </s:Header>

  <s:Body>

    <FundDetail xmlns="http://tempuri.org/">

      <Pricedetails xmlns="http://www.Example.com"  xmlns:a="http://schemas.datacontract.org/2004/07/MessageContractDB"  xmlns:i="http://www.w3.org/2001/XMLSchema-instance">

        <a:Pricedetail>

          <a:OfferPrice>2.486</a:OfferPrice>

          <a:PriceIDNo>20980</a:PriceIDNo>

        </a:Pricedetail>

        <a:Pricedetail>

          <a:OfferPrice>2.486</a:OfferPrice>

          <a:PriceIDNo>20980</a:PriceIDNo>

        </a:Pricedetail>

        <a:Pricedetail>

          <a:OfferPrice>2.486</a:OfferPrice>

          <a:PriceIDNo>20980</a:PriceIDNo>

        </a:Pricedetail>

      </Pricedetails>

    </FundDetail>

  </s:Body>

</s:Envelope>

Next  Step  :  Change  Funddetail  Class Member

From  =    [MessageBodyMember(Name = "Pricedetails", Namespace = "http://www.Example.mu")]

               public Pricedetail[] records;

    

TO   =  [MessageHeaderArray(Name = "Pricedetails", Namespace = "http://www.Example.mu")]

         public Pricedetail[] records;

OutPut :

Run your service in WCFTESTCLIENT  and get XML  each array element is serialized independently and so that each array element has one header.

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">

  <s:Header>

    <h:FundID_Master xmlns:h="http://tempuri.org/">7</h:FundID_Master>

    <h:FundName xmlns:h="http://tempuri.org/">US Global Fund</h:FundName>

   

   <h:Pricedetails xmlns:h="http://www.Example.mu" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">

      <OfferPrice xmlns="http://schemas.datacontract.org/2004/07/MessageContractDB">2.486</OfferPrice>

      <PriceIDNo xmlns="http://schemas.datacontract.org/2004/07/MessageContractDB">20980</PriceIDNo>

    </h:Pricedetails>

  

    <h:Pricedetails xmlns:h="http://www.Example.mu" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">

      <OfferPrice xmlns="http://schemas.datacontract.org/2004/07/MessageContractDB">2.486</OfferPrice>

      <PriceIDNo xmlns="http://schemas.datacontract.org/2004/07/MessageContractDB">20980</PriceIDNo>

    </h:Pricedetails>

   

    <h:Pricedetails xmlns:h="http://www.Example.mu" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">

      <OfferPrice xmlns="http://schemas.datacontract.org/2004/07/MessageContractDB">2.486</OfferPrice>

      <PriceIDNo xmlns="http://schemas.datacontract.org/2004/07/MessageContractDB">20980</PriceIDNo>

    </h:Pricedetails>

  </s:Header>

  <s:Body>

    <FundDetail xmlns="http://tempuri.org/" />

  </s:Body>

</s:Envelope>