Re: A serialization problem

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From: Jared Parsons [MSFT] (jaredpar_at_online.microsoft.com)
Date: 06/16/04 

Date: Wed, 16 Jun 2004 10:49:33 -0700

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.Flush();
    fileStream.Close();

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

-- 
Jared Parson [MSFT]
jaredpar@online.microsoft.com
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"Mike" <noone@hotmail.com> wrote in message
news:uilCwN3UEHA.412@TK2MSFTNGP10.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.SerializationException' 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 PersistantSettings
>   {
>    // only 1 tyring to persist one object for now
>    public IList WatchdogToWatch;
>
>    public PersistantSettings()
>    {
>    }
>   }
>
>   public void SaveSettings()
>   {
>    FileStream fileStream = new
> FileStream(System.Windows.Forms.Application.CommonAppDataPath
>     + SettingsFile, FileMode.OpenOrCreate, FileAccess.Write);
>    BinaryFormatter formatter = new BinaryFormatter();
>
>    this.Settings.WatchdogToWatch = toWatch; // both are declared as ILists
>    formatter.Serialize(fileStream, this.Settings);
>   }
>
>   public bool LoadSettings()
>   {
>    FileStream fileStream;
>    BinaryFormatter formatter = new BinaryFormatter();
>    bool fileExists = false;
>
>    fileStream = new
> FileStream(System.Windows.Forms.Application.CommonAppDataPath
>     + SettingsFile, FileMode.Open, FileAccess.Read);
>
>    // this is the line that causes the error
>    PersistantSettings settings =
> (PersistantSettings)formatter.Deserialize(fileStream);
>    // etc...
>   }
>
>   //...
> }
>
>
>
> Here is the binary file produced by the serialization (if this is any
use):
>
>  FUwcTelcoControl, Version=0.0.0.0, Culture=neutral,
>
PublicKeyToken=null)Uwc.TelcoControl.Form1+PersistantSettingsWatchdogToW
> atchSystem.Collections.ArrayList
> System.Collections.ArrayList_items_size_version  
>  HUwcLibrary, Version=1.0.1628.30181, Culture=neutral,
>
PublicKeyToken=nullToken=null=nullUwc.Entities.RetailerMasterIdWholesal
> erMasterIdTypeNameUwc.Entities.EntityType
> YUwc.Entities.EntityTypevalue__  CH01 - Ring Phonecard
> 
> CH02 - Lime PhonecardCH03 - Western Union
> PhonecardTCH04 - Bharath
> Phonecard card3CH03 - Western Union
> PhonecardT5CH04 - Bharath
> Phonecard8T7$GG01 - Global Gossip Phonecard (AUS) ?
> 9GG02 - Global Community Card
> <;GG03 - BTC TravelTribe <=GG04 - Global
> Gossip TeleCard <?GG05 - Oz Experience Phonecard
> <A"GG06 - Worldwide Workers
PhonecardjCGG07 -
> Nomads PhonecardkEGG08 - Buzz
CardlGGG09 -
> UWS Phonecard\IGG10 -
StudentCard%)KGG11 -
> UTS Phonecard%{MGG12 - Insearch
> PhonecardOGG14 - Global Gossip
> TeleCode*YQPC01 - Britz Phonecard+YSPC02 -
> Maui Phonecard'UPC03 - Alpine
> PhonecardWTEST - Test product6Y)U015 -
> Backpackers World Travel Phonecard7[!U016 - Base
Backpackers
> PhonecardS]*U017 - Friendly Backpacker Group
> PhonecardT_&U018 - Work & Travel Company Phonecard& 
> aU019 - Swagmail Phonecardo zc)U020 - Travellers
> Contact Point Phonecardo oe)U021 - English Language Company
> Phonecard T!sgU022 - CIEE International!"
> !~i#U023 - Global Gossip Phonecard (US)")!-kU024 -
> Internet Outpost#)!"mU025 - Unity Card$)!'
> o'U026 - NEW Global Gossip Community
>
Card%Uwc.Entities.WholesalerMasterIdTypeNameUwc.Entities.EntityTyp
> e//HqBharath Phonecard&%sZs
> BudgetTel'%OuDEMO(%SSw
> Global Gossip)%^yGlobal Gossip Phonecard
> US*%!?{Global Gossip Venice Beach+%o"}Lime
> Phonecard,%S,Promocom-%>?Ring
> Phonecard.%~fWestern Union
> Phonecard |.Promocom/'>z?Ring
> Phonecard0'x?Western Union Phonecard
>
>
> Any help would be greatlyt appreciated.
>
> Cheers,
>
> Mike
>
>

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