RawString类型的Message

using System;
using System.IO;
using System.Text;
using System.Xml.Serialization;
using System.Runtime.Serialization;

using Microsoft.XLANGs.BaseTypes;

namespace Microsoft.Samples.BizTalk.XlangCustomFormatters
{
    public abstract class BaseFormatter : IFormatter
    {
        public virtual SerializationBinder Binder
        {
            get { throw new NotSupportedException(); }
            set { throw new NotSupportedException(); }
        }

        public virtual StreamingContext Context
        {
            get { throw new NotSupportedException(); }
            set { throw new NotSupportedException(); }
        }

        public virtual ISurrogateSelector SurrogateSelector
        {
            get { throw new NotSupportedException(); }
            set { throw new NotSupportedException(); }
        }

        public abstract void Serialize(Stream stm, object obj);
        public abstract object Deserialize(Stream stm);
    }

    public class RawStringFormatter : BaseFormatter
    {
        public override void Serialize(Stream s, object o)
        {
            RawString rs = (RawString)o;
            byte[] ba = rs.ToByteArray();
            s.Write(ba, 0, ba.Length);
        }

        public override object Deserialize(Stream stm)
        {
            StreamReader sr = new StreamReader(stm, true);
            string s = sr.ReadToEnd();
            return new RawString(s);
        }
    }

    [CustomFormatter(typeof(RawStringFormatter))]
    [Serializable]
    public class RawString
    {
        [XmlIgnore]
        string _val;

        public RawString(string s)
        {
            if (null == s)
                throw new ArgumentNullException();
            _val = s;
        }

        public RawString()
        {
        }

        public byte[] ToByteArray()
        {
            return Encoding.UTF8.GetBytes(_val);
        }

        public override string ToString()
        {
            return _val;
        }
    }
}

RawString一种新MessageType诞生了。