Deseralization problem...

5 Apr 2006 11:00 AM

basulasz

I have a mail class which is extended from Outlook.MailItem like below to
make it serializable

    [Serializable]
    public class myMail : ISerializable
    {
        Outlook.MailItem Mail;
        public myMail(Outlook.MailItem Mail)
        {
            this.Mail = Mail;
        }

        public Outlook.MailItem getMail()
        {
            return Mail;
        }

        void ISerializable.GetObjectData(SerializationInfo info,
StreamingContext context)
        {

        }
    }

I serialize the object which is created by it with the below function

        public byte[] getByteArrayWithObject(Outlook.MailItem o)
        {
            MemoryStream ms = new MemoryStream();
            BinaryFormatter bf1 = new BinaryFormatter();
            myMail myo = new myMail(o);
            bf1.Serialize(ms, myo);
            return ms.ToArray();
        }

Then again I create a MailItem object with this code

Outlook.MailItem mailItem =
(Outlook.MailItem)this.CreateItem(Outlook.OlItemType.olMailItem);

myMail myDeserializedMail = new myMail(mailItem);

And then i want to deserialize the object which i get from db (in binary
form) with the below code

        public object getObjectWithByteArray(byte[] theByteArray)
        {
            MemoryStream ms = new MemoryStream(theByteArray);
            BinaryFormatter bf1 = new BinaryFormatter();
            ms.Position = 0;

            return bf1.Deserialize(ms);
}

--> getObjectWithByteArray(blob);

But at this moment i raises exception that

"ex = {"The constructor to deserialize an object of type 'GetMail.myMail'
was not found."}"

What can i do???

11 Apr 2006 11:44 AM

Adam Benson

Usually a class that has manual serialisation (where you have a routine that
does the serialising for you - your GetObjectData method) needs a ctor that
looks something like this :

protected MyClass(SerializationInfo info, StreamingContext context)

{

myint64 = info.GetInt64("f1");

mybool = info.GetBoolean("b1");

}

You might try sticking a default ctor in, as well

i.e.

public MyClass()

Try this. HTH,

Adam.

Show quote

"basulasz" <basul***@discussions.microsoft.com> wrote in message
news:9A879A0E-6487-47F9-BD7F-7A8F27600B27@microsoft.com...
>I have a mail class which is extended from Outlook.MailItem like below to
> make it serializable
>
>    [Serializable]
>    public class myMail : ISerializable
>    {
>        Outlook.MailItem Mail;
>        public myMail(Outlook.MailItem Mail)
>        {
>            this.Mail = Mail;
>        }
>
>        public Outlook.MailItem getMail()
>        {
>            return Mail;
>        }
>
>        void ISerializable.GetObjectData(SerializationInfo info,
> StreamingContext context)
>        {
>
>        }
>    }
>
> I serialize the object which is created by it with the below function
>
>        public byte[] getByteArrayWithObject(Outlook.MailItem o)
>        {
>            MemoryStream ms = new MemoryStream();
>            BinaryFormatter bf1 = new BinaryFormatter();
>            myMail myo = new myMail(o);
>            bf1.Serialize(ms, myo);
>            return ms.ToArray();
>        }
>
> Then again I create a MailItem object with this code
>
> Outlook.MailItem mailItem =
> (Outlook.MailItem)this.CreateItem(Outlook.OlItemType.olMailItem);
>
> myMail myDeserializedMail = new myMail(mailItem);
>
> And then i want to deserialize the object which i get from db (in binary
> form) with the below code
>
>        public object getObjectWithByteArray(byte[] theByteArray)
>        {
>            MemoryStream ms = new MemoryStream(theByteArray);
>            BinaryFormatter bf1 = new BinaryFormatter();
>            ms.Position = 0;
>
>            return bf1.Deserialize(ms);
> }
>
> --> getObjectWithByteArray(blob);
>
> But at this moment i raises exception that
>
> "ex = {"The constructor to deserialize an object of type 'GetMail.myMail'
> was not found."}"
>
> What can i do???