A serialization problem

[Mike]

Hello.

I am using C# in .NET v1.1. I am trying to serialize an object to disk and
read it back again. The serialization seems to work OK (at least, it
completes without error). However, I get the following error when trying to
deserialize:

An unhandled exception of type
'System.Runtime .Serialization. SerializationEx ception' occurred in
mscorlib.dll

Additional information: Binary stream does not contain a valid BinaryHeader,
84 possible causes, invalid stream or object version change between
serialization and deserialization .

My serialization code is as follows (this.Settings is an instance of the
serializable Persistant Settings class):

public class MyApp : System.Windows. Forms.Form
{
// code stripped down...

[Serializable]
public class PersistantSetti ngs
{
// only 1 tyring to persist one object for now
public IList WatchdogToWatch ;

public PersistantSetti ngs()
{
}
}

public void SaveSettings()
{
FileStream fileStream = new
FileStream(Syst em.Windows.Form s.Application.C ommonAppDataPat h
+ SettingsFile, FileMode.OpenOr Create, FileAccess.Writ e);
BinaryFormatter formatter = new BinaryFormatter ();

this.Settings.W atchdogToWatch = toWatch; // both are declared as ILists
formatter.Seria lize(fileStream , this.Settings);
}

public bool LoadSettings()
{
FileStream fileStream;
BinaryFormatter formatter = new BinaryFormatter ();
bool fileExists = false;

fileStream = new
FileStream(Syst em.Windows.Form s.Application.C ommonAppDataPat h
+ SettingsFile, FileMode.Open, FileAccess.Read );

// this is the line that causes the error
PersistantSetti ngs settings =
(PersistantSett ings)formatter. Deserialize(fil eStream);
// etc...
}

//...
}

Here is the binary file produced by the serialization (if this is any use):


ÿÿÿÿ
FUwcTelcoContr ol, Version=0.0.0.0 , Culture=neutral ,
PublicKeyToken= null
)Uwc.Telc oControl.Form1+ PersistantSetti ngs
WatchdogTo W
atchSystem.Co llections.Array List
System.Coll ections.ArrayLi st_items_siz e_version 

 
HUwcLibrary, Version=1.0.162 8.30181, Culture=neutral ,
PublicKeyToken= nullToken=null= nullUwc.Enti ties.Retailer MasterIdWholesa l
erMasterIdTyp eName
Uwc. Entities.Entity Type
Y�öÿÿÿUwc.En tities.EntityTy pe
value__ CH01 - Ring Phonecard

�
ôÿÿÿöÿÿÿ
CH02 - Lime Phonecard
¡�
òÿÿÿöÿÿÿCH 03 - Western Union
Phonecard
TÅ
ðÿÿÿöÿÿÿCH 04 - Bharath
Phonecardcard
¡�
ÎÿÿÿÐÿÿÿ 3CH03 - Western Union
Phonecard
TÅ
ÌÿÿÿÐÿÿÿ5CH 04 - Bharath
Phonecard
8T
ÊÿÿÿÐÿÿÿ7$GG 01 - Global Gossip Phonecard (AUS)
?Ö

ÈÿÿÿÐÿÿÿ9GG 02 - Global Community Card

ô<

ÆÿÿÿÐÿÿÿ ;GG03 - BTC TravelTribe
õ <

ÄÿÿÿÐÿÿÿ= GG04 - Global
Gossip TeleCard
ö<

ÂÿÿÿÐÿÿÿ ?GG05 - Oz Experience Phonecard

÷<

ÀÿÿÿÐÿÿÿ A"GG06 - Worldwide Workers Phonecard
jÌ
¾ÿÿÿÐÿÿÿCGG 07 -
Nomads Phonecard
kÌ
¼ÿÿÿÐÿÿÿEGG 08 - Buzz Card
lÌ
ºÿÿÿ ÐÿÿÿGGG09 -
UWS Phonecard
\
¸ÿÿÿÐÿÿÿIGG 10 - StudentCard
% )
¶ÿÿÿÐÿÿÿK GG11 -
UTS Phonecard
%{
´ÿÿÿÐÿÿÿMGG 12 - Insearch
Phonecard
Èç
²ÿÿÿÐÿÿÿOGG 14 - Global Gossip
TeleCode
*Y
°ÿÿÿÐÿÿÿQPC0 1 - Britz Phonecard
+Y
®ÿÿÿÐÿÿÿSPC 02 -
Maui Phonecard
'
¬ÿÿÿÐÿÿÿUPC 03 - Alpine
Phonecard
öÿÿ ÿ
ªÿÿÿÐÿÿÿWT EST - Test product
6ô
¨ ÿÿÿÐÿÿÿY)U015 -
Backpackers World Travel Phonecard
7ô
¦ÿÿÿÐÿÿÿ[!U016 - Base Backpackers
Phonecard
Sä
¤ÿÿÿÐÿÿÿ]*U017 - Friendly Backpacker Group
Phonecard
Tä
¢ÿÿÿÐÿÿÿ_&U0 18 - Work & Travel Company Phonecard
½&

ÿÿÿÐÿÿÿaU019 - Swagmail Phonecard
o
zÿÿÿÐÿÿÿc)U0 20 - Travellers
Contact Point Phonecard
o
oÿÿÿÐÿÿÿe)U0 21 - English Language Company
Phonecard
T
!
sÿÿÿÐÿÿÿ gU022 - CIEE International
! "
!
~ÿÿÿÐÿÿÿi#U 023 - Global Gossip Phonecard (US)
"¥)!
-ÿÿÿÐÿÿÿkU024 -
Internet Outpost
#¦)!
" ÿÿÿÐÿÿÿmU025 - Unity Card
$§)!
'
ÿÿÐÿÿÿo'U026 - NEW Global Gossip Community
Card%Uwc.Enti ties.Wholesaler MasterIdType Name
Uwc.En tities.EntityTy p
e//H
�ÿÿÿÐÿÿÿ
q Bharath Phonecard
&%s´
ZÿÿÿÐÿÿÿ
s
BudgetTel
'%þÿÿ ÿ
OÿÿÿÐÿÿÿ
uD EMO
(%ÇS
SÿÿÿÐ ÿÿÿ
w
Global Gossip
)%Ü
^ÿ ÿÿÐÿÿÿ
yGloba l Gossip Phonecard
US
*%´¤!
?ÿÿÿÐÿ ÿÿ
{Global Gossip Venice Beach
+%o´
"ÿÿ ÿÐÿÿÿ
}Lime
Phonecard
,%ÆS
,ÿÿÿÐÿÿÿ
Pr omocom
-%>´
?ÿÿÿÐÿÿÿ
 �Ring
Phonecard
.%�´
~ÿÿÿÐÿÿÿ
fWe stern Union
Phonecard
|ÿÿÿ Îÿÿÿ
.Promoco m
/'>´
zÿÿÿÎÿÿÿ
 ?Ring
Phonecard
0'�´
xÿÿÿÎÿÿÿ
?We stern Union Phonecard
Any help would be greatlyt appreciated.

Cheers,

Mike

[Jared Parsons [MSFT]]

You problem probably is a result of the data not being completely written to
disk. Try adding the following code to the end of the SaveSettings() method

fileStream.Flus h();
fileStream.Clos e();

Also make sure you close the file stream after you load the serializaed
information.

--
Jared Parson [MSFT]
ja******@online .microsoft.com

This posting is provided "AS IS" with no warranties, and confers no rights.
Use of included script samples are subject to the terms specified at
http://www.microsoft.com/info/cpyright.htm

"Mike" <no***@hotmail. com> wrote in message
news:ui******** *****@TK2MSFTNG P10.phx.gbl...

Hello.

I am using C# in .NET v1.1. I am trying to serialize an object to disk and read it back again. The serialization seems to work OK (at least, it
completes without error). However, I get the following error when trying to deserialize:

An unhandled exception of type
'System.Runtime .Serialization. SerializationEx ception' occurred in
mscorlib.dll

Additional information: Binary stream does not contain a valid BinaryHeader, 84 possible causes, invalid stream or object version change between
serialization and deserialization .

My serialization code is as follows (this.Settings is an instance of the
serializable Persistant Settings class):

public class MyApp : System.Windows. Forms.Form
{
// code stripped down...

[Serializable]
public class PersistantSetti ngs
{
// only 1 tyring to persist one object for now
public IList WatchdogToWatch ;

public PersistantSetti ngs()
{
}
}

public void SaveSettings()
{
FileStream fileStream = new
FileStream(Syst em.Windows.Form s.Application.C ommonAppDataPat h
+ SettingsFile, FileMode.OpenOr Create, FileAccess.Writ e);
BinaryFormatter formatter = new BinaryFormatter ();

this.Settings.W atchdogToWatch = toWatch; // both are declared as ILists
formatter.Seria lize(fileStream , this.Settings);
}

public bool LoadSettings()
{
FileStream fileStream;
BinaryFormatter formatter = new BinaryFormatter ();
bool fileExists = false;

fileStream = new
FileStream(Syst em.Windows.Form s.Application.C ommonAppDataPat h
+ SettingsFile, FileMode.Open, FileAccess.Read );

// this is the line that causes the error
PersistantSetti ngs settings =
(PersistantSett ings)formatter. Deserialize(fil eStream);
// etc...
}

//...
}

Here is the binary file produced by the serialization (if this is any use):

ÿÿÿÿ
FUwcTelcoContr ol, Version=0.0.0.0 , Culture=neutral ,
PublicKeyToken= null
)Uwc.Telc oControl.Form1+ PersistantSetti ngs
WatchdogTo W atchSystem.Co llections.Array List
System.Coll ections.ArrayLi st_items_siz e_version 

 
 HUwcLibrary, Version=1.0.162 8.30181, Culture=neutral ,
PublicKeyToken= nullToken=null= nullUwc.Enti ties.Retailer MasterIdWholesa l erMasterIdTyp eName
Uwc. Entities.Entity Type
Y�öÿÿÿUwc.En tities.EntityTy pe
value__  CH01 - Ring Phonecard

�
ôÿÿÿöÿÿÿ
CH02 - Lime Phonecard
¡�
òÿÿÿöÿÿÿCH 03 - Western Union
Phonecard
TÅ
ðÿÿÿöÿÿÿCH 04 - Bharath
Phonecard card
¡�
Îÿÿÿ Ðÿÿÿ3CH03 - Western Union
Phonecard
TÅ
ÌÿÿÿÐÿÿÿ5CH 04 - Bharath
Phonecard
8T
ÊÿÿÿÐÿÿÿ7$GG 01 - Global Gossip Phonecard (AUS)
?Ö

ÈÿÿÿÐÿÿÿ9GG 02 - Global Community Card

ô<

ÆÿÿÿÐÿÿÿ ;GG03 - BTC TravelTribe
õ<

ÄÿÿÿÐÿÿÿ =GG04 - Global
Gossip TeleCard
ö<

ÂÿÿÿÐÿÿÿ ?GG05 - Oz Experience Phonecard

÷<

ÀÿÿÿÐÿÿÿ A"GG06 - Worldwide Workers Phonecard
jÌ
¾ÿÿÿÐÿÿÿCGG 07 - Nomads Phonecard
kÌ
¼ÿÿÿÐÿÿÿEGG 08 - Buzz Card
lÌ
ºÿÿÿ ÐÿÿÿGGG09 - UWS Phonecard
\
¸ÿÿÿÐÿÿÿIGG 10 - StudentCard
% )
¶ÿÿÿÐÿÿÿK GG11 - UTS Phonecard
%{
´ÿÿÿÐÿÿÿMGG 12 - Insearch
Phonecard
Èç
²ÿÿÿÐÿÿÿOGG 14 - Global Gossip
TeleCode
*Y
°ÿÿÿÐÿÿÿQPC0 1 - Britz Phonecard
+Y
®ÿÿÿÐÿÿÿSPC 02 -
Maui Phonecard
'
¬ÿÿÿÐÿÿÿUPC 03 - Alpine
Phonecard
öÿÿ ÿ
ªÿÿÿÐÿÿÿWT EST - Test product
6ô
¨ ÿÿÿÐÿÿÿY)U015 -
Backpackers World Travel Phonecard
7ô
¦ÿÿÿÐÿÿÿ[!U016 - Base Backpackers Phonecard
Sä
¤ÿÿÿÐÿÿÿ]*U017 - Friendly Backpacker Group
Phonecard
Tä
¢ÿÿÿÐÿÿÿ_&U0 18 - Work & Travel Company Phonecard
½&

ÿÿÿÐÿÿÿaU019 - Swagmail Phonecard
o
zÿÿÿÐÿÿÿc)U0 20 - Travellers
Contact Point Phonecard
o
oÿÿÿÐÿÿÿe)U0 21 - English Language Company
Phonecard
T
!
sÿÿÿÐÿÿÿ gU022 - CIEE International
! "
!
~ÿÿÿÐÿÿÿi#U 023 - Global Gossip Phonecard (US)
"¥)!
-ÿÿÿÐÿÿÿkU024 -
Internet Outpost
#¦)!
" ÿÿÿÐÿÿÿmU025 - Unity Card
$§)!
'
ÿÿÐÿÿÿo'U026 - NEW Global Gossip Community
Card%Uwc.Enti ties.Wholesaler MasterIdType Name
Uwc.En tities.EntityTy p e//H
�ÿÿÿÐÿÿÿ
q Bharath Phonecard
&%s´
ZÿÿÿÐÿÿÿ
s
BudgetTel
'%þÿÿ ÿ
OÿÿÿÐÿÿÿ
uD EMO
(%ÇS
SÿÿÿÐ ÿÿÿ
w
Global Gossip
)%Ü
^ÿ ÿÿÐÿÿÿ
yGloba l Gossip Phonecard
US
*%´¤!
?ÿÿÿÐÿ ÿÿ
{Global Gossip Venice Beach
+%o´
"ÿÿ ÿÐÿÿÿ
}Lime
Phonecard
,%ÆS
,ÿÿÿÐÿÿÿ
Pr omocom
-%>´
?ÿÿÿÐÿÿÿ
 �Ring
Phonecard
.%�´
~ÿÿÿÐÿÿÿ
fWe stern Union
Phonecard
|ÿÿÿÎÿÿÿ
.Pr omocom
/'>´
zÿÿÿÎÿÿÿ
 ?Ring
Phonecard
0'�´
xÿÿÿÎÿÿÿ
?We stern Union Phonecard
Any help would be greatlyt appreciated.

Cheers,

Mike

[Mike]

> You problem probably is a result of the data not being completely written
to

disk. Try adding the following code to the end of the SaveSettings() method
fileStream.Flus h();
fileStream.Clos e();

That did it, thanks.

Mike