Help for creating a generic method for CustomBodyWrier inherited from BodyWriter

Hi,

I have created an application to send data from WCF server application to my client side application. For this I have added a custom serialization instead of the default serialization. And now its sending data to the client as stream and I am able to de-serialize the object back in client application. But now my function only work for specific type. For instance if I am returning Class of type Customer its serializing and de-serializing based on the class I am specifying. I need to write a generic class which will accept any type of object for serialization and de-serialization. How can I do this?

Following is the piece of code that I want to generalize.

public class CustomBodyWriter : BodyWriter
{
private IEnumerable> Customers;

public CustomBodyWriter(IEnumerable> customers)
: base(false) // False should be passed here to avoid buffering the message

{

this.Customers = customers;

}

protected override void OnWriteBodyContents(System.Xml.XmlDictionaryWriter writer)

{

XmlSerializer serializer = new XmlSerializer(typeof(List));

writer.WriteStartElement("Customers");

foreach (List customer in Customers)

{

serializer.Serialize(writer, part);

}

writer.WriteEndElement();

}

}

public IEnumerable> GetAllCustomersImpl()

{

TestStreamingBL TestStreamingBL = new TestStreamingBL();

List list = new List();

int count = 1;

foreach (Customer customer in TestStreamingBL.GetAllCustomers())

{

list.Add(customer);

if (count == 100)

{

count = 1;

yield return list;

list.Clear();

}

count++;

}

yield break;

}

In above code when ever the "yield return list" execute OnWriteBodyContents will get called

Any idea???

Anilal

Well, the following generic class should at least compile but whether it's quite what you want I don't know:

public class CustomBodyWriter : BodyWriter

{

private IEnumerable> serializableObjects;

public CustomBodyWriter(IEnumerable> serializableObjects)

: base(false) // False should be passed here to avoid buffering the message

{

this.serializableObjects = serializableObjects;

}

protected override void OnWriteBodyContents(System.Xml.XmlDictionaryWriter writer)

{

XmlSerializer serializer = new XmlSerializer(typeof(List));

string startElement = typeof(T).Name + "s";

writer.WriteStartElement(startElement);

foreach (List serializableObject in serializableObjects)

{

serializer.Serialize(writer, serializableObject); // not sure what 'part' was?

}

writer.WriteEndElement();

}

'T' will, of course, need to be a serializable type. If 'Customer' and all the other types you want to serialize implement an interface such as IXmlSerializable then you may want to add the constraint - where T : IXmlSerializable - to the class declaration.

As far as your iterator, GetAllCustomersImpl, is concerned (I assume it's declared in another class), it's difficult to see how you can generalize it as it stands because you're calling TestStreamingBL.GetAllCustomers() which presumably can only return a collection of Customer objects.

1 Reply

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Vulpes15y ago
Accepted answer
Well, the following generic class should at least compile but whether it's quite what you want I don't know:

public class CustomBodyWriter : BodyWriter
{
   private IEnumerable> serializableObjects;

   public CustomBodyWriter(IEnumerable> serializableObjects)
   : base(false) // False should be passed here to avoid buffering the message
   {
   this.serializableObjects = serializableObjects;
   }

   protected override void OnWriteBodyContents(System.Xml.XmlDictionaryWriter writer)
   {

   XmlSerializer serializer = new XmlSerializer(typeof(List));
   string startElement = typeof(T).Name + "s";
   writer.WriteStartElement(startElement);

   foreach (List serializableObject in serializableObjects)
   {
   serializer.Serialize(writer, serializableObject); // not sure what 'part' was?
   }

   writer.WriteEndElement();
   }
}

'T' will, of course, need to be a serializable type. If 'Customer' and all the other types you want to serialize implement an interface such as IXmlSerializable then you may want to add the constraint - where T : IXmlSerializable - to the class declaration.

As far as your iterator, GetAllCustomersImpl, is concerned (I assume it's declared in another class), it's difficult to see how you can generalize it as it stands because you're calling TestStreamingBL.GetAllCustomers() which presumably can only return a collection of Customer objects.