Hello David,
I noticed that the issue was posted in several groups (places).
* I have added a reply to you at microsoft.public.dotnet.languages.csharp
If you have follow up questions, please post there and I will work with
you. Thanks.
Jeffrey Tan
Microsoft Online Partner Support
Get Secure! -
www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.
--------------------
| From: "David Sworder" <ds******@cts.com>
| Subject: How to Serialize 'null'?
| Date: Wed, 20 Aug 2003 16:28:54 -0700
| Lines: 36
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|
| Hi,
|
| I've created a UserControl-derived class called MyUserControl that is
| able to persist and subsequently reload its state. It exposes two methods
as
| follows:
|
| public void Serialize(Stream s);
| public void Deserialize(Stream s);
|
| Within the MyUserControl class, there is a field of type MyInnerClass
| which is defined as follows:
|
| private MyInnerClass MyInner=null;
|
| ...where MyInnerClass is defined as:
|
| [Serializable()]
| private class MyInnerClass{
| public int Field;
| public String Str;
| }
|
| When MyUserControl.Serialize() is called, 'MyInner' might be null or
it
| might not be. When it's not null, serialization takes place properly. When
| it *is* null, serialization fails with an exception because
| BinaryFormatter.Serialize() expects a non-null parameter.
|
| What is the appropriate design pattern to use when serializing fields
| which might be null? I'd like to avoid having to serialize an extra 'bool'
| flag that indicates whether the field is null or not. Any ideas?
|
| Thanks in advance,
|
| David
|
|
|
