How to Use BinaryFormatter in windows phone 7

Question

How can I use BinaryFormatter in Windows Phone 7.

I use this using System.Runtime.Serialization.Formatters.Binary in service1.svc.cs but I can't use this Reference in windows phone 7.

Is there any solution to this?

My Code For DeserializeObject

 public static T DeserializeObject<T>(byte[] xml)
    {
        BinaryFormatter xs = new BinaryFormatter();
        MemoryStream memoryStream = new MemoryStream(xml);
        return (T)xs.Deserialize(memoryStream);
    } 

BinaryFormatter gives error in windows phone 7. So how can I Deserialize. What changes that I have to do in this code?

Answer 1

As @driis mentioned, you cannot use BinaryFormatter on Windows Phone. You can use the binary encoding in a WCF endpoint (i.e., an endpoint whose binding is a custom binding with the BinaryMessageEncodingBindingElement and the HttpTransportBindingElement), and that will be supported on WP7. You just cannot use the binary formatter there.

Update following comment: Looking at your code, it's not only that code that needs to be changed - you need to change the service code as well, to serialize an object in a format which is supported in Silverlight. You can use the DataContractSerializer, with a binary reader / writer, or you can use another library which is supported in both cases. For example, the code below should work in both desktop and SL versions:

public static T DeserializeObject<T>(byte[] xml) 
{ 
    using (MemoryStream memoryStream = new MemoryStream(xml))
    {
        using (XmlDictionaryReader reader = XmlDictionaryReader.CreateBinaryReader(
            memoryStream, XmlDictionaryReaderQuotas.Max))
        {
            DataContractSerializer dcs = new DataContractSerializer(typeof(T));
            return (T)dcs.ReadObject(reader);
        }
    }
}

And on the server:

public static byte[] SerializeObject<T>(T obj)
{
    using (MemoryStream ms = new MemoryStream())
    {
        using (XmlDictionaryWriter writer = XmlDictionaryWriter.CreateBinaryWriter(ms))
        {
            DataContractSerializer dcs = new DataContractSerializer(typeof(T));
            dcs.WriteObject(writer, obj);
            writer.Flush();
            return ms.ToArray();
        }
    }
}

Answer 2

BinaryFormatter is not supported in Windows Phone 7.