Bug 27260 - DataContractSerializer fails to call OnSerializing method
Summary: DataContractSerializer fails to call OnSerializing method
Status: CONFIRMED
Alias: None
Product: Android
Classification: Xamarin
Component: BCL Class Libraries ()
Version: 4.20.0
Hardware: PC Windows
: Normal normal
Target Milestone: ---
Assignee: Marek Habersack
URL:
Depends on:
Blocks:
 
Reported: 2015-02-20 12:05 UTC by j.harris
Modified: 2016-11-11 10:02 UTC (History)
2 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:


Attachments
Project to reproduce the problem (27.18 KB, application/x-zip-compressed)
2015-02-20 12:05 UTC, j.harris
Details


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Status:
CONFIRMED

Description j.harris 2015-02-20 12:05:51 UTC
Created attachment 9950 [details]
Project to reproduce the problem

When using DataContractSerializer, methods in the model which is being Serialized/Deserialized can be marked with attributes so that they are called at particular points in the process.  These are OnDeserializing, OnDeserialized, OnSerializing and OnSerialized.

When using the DataContractSerializer in Xamarin.Android, it calls the model methods attributed as OnDeserializing and OnDeserialized, but it fails to call the OnSerializing and OnSerialized methods.  All four methods are called when identical code is run in .Net, but in Xamarin.Android, only the Deserialize methods are called.

I also tested with DataContractJsonSerializer, and that worked fine for all 4 methods, so I think this issue is unique to DataContractSerializer.

I've attached a simple project to reproduce the problem.
Comment 1 Rajneesh Kumar 2015-07-02 14:44:07 UTC
I have checked this issue and able to reproduce it. To reproduce this issue I have followed the steps and instruction provide din bug description.

Steps to reproduced:

1. Open attached test Sample in VS.
2. Use "DataContractSerializer" 
3. Build and deploy the application.
4. Observed that you will fined in application output:
     PreDeserialize called
     PreDeserialize called
     PreDeserialize called
     PostDeserialize called
     PostDeserialize called
     PostDeserialize called
5. Now test it with "DataContractJsonSerializer"
6. Build and run the application.
7. Observed the application output:
 PreSerialize called
 PostSerialize called
 PreDeserialize called
 PostDeserialize called

Screencast: http://www.screencast.com/t/2R1SrV2N
Build output: https://gist.github.com/Rajneesh360Logica/9b1a995fc18d94babdd1

Environment Info:

Microsoft Visual Studio Professional 2013
Version 12.0.31101.00 Update 4
Microsoft .NET Framework
Version 4.5.50938

Installed Version: Professional

LightSwitch for Visual Studio 2013   06177-004-0446016-02381
Microsoft LightSwitch for Visual Studio 2013

Team Explorer for Visual Studio 2013   06177-004-0446016-02381
Microsoft Team Explorer for Visual Studio 2013

Visual Basic 2013   06177-004-0446016-02381
Microsoft Visual Basic 2013

Visual C# 2013   06177-004-0446016-02381
Microsoft Visual C# 2013

Visual C++ 2013   06177-004-0446016-02381
Microsoft Visual C++ 2013

Visual F# 2013   06177-004-0446016-02381
Microsoft Visual F# 2013

Visual Studio 2013 Code Analysis Spell Checker   06177-004-0446016-02381
Microsoft® Visual Studio® 2013 Code Analysis Spell Checker

Portions of International CorrectSpell™ spelling correction system © 1993 by Lernout & Hauspie Speech Products N.V. All rights reserved.

The American Heritage® Dictionary of the English Language, Third Edition Copyright © 1992 Houghton Mifflin Company. Electronic version licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

Windows Phone SDK 8.0 - ENU   06177-004-0446016-02381
Windows Phone SDK 8.0 - ENU

Application Insights Tools for Visual Studio Package   1.0
Application Insights Tools for Visual Studio

ASP.NET and Web Tools   12.4.51016.0
Microsoft Web Developer Tools contains the following components:
Support for creating and opening ASP.NET web projects
Browser Link: A communication channel between Visual Studio and browsers
Editor extensions for HTML, CSS, and JavaScript
Page Inspector: Inspection tool for ASP.NET web projects
Scaffolding: A framework for building and running code generators
Server Explorer extensions for Microsoft Azure Websites
Web publishing: Extensions for publishing ASP.NET web projects to hosting providers, on-premises servers, or Microsoft Azure

ASP.NET Web Frameworks and Tools 2012.2   4.1.21001.0
For additional information, visit http://go.microsoft.com/fwlink/?LinkID=309563

ASP.NET Web Frameworks and Tools 2013   5.2.21010.0
For additional information, visit http://www.asp.net/

Common Azure Tools   1.3
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Microsoft Advertising SDK for Windows Phone   
Microsoft Advertising SDK for Windows Phone
Build 

Microsoft Azure Mobile Services Tools   1.3
Microsoft Azure Mobile Services Tools

NuGet Package Manager   2.8.50926.663
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.

Office Developer Tools for Visual Studio 2013 ENU   12.0.30626
Microsoft Office Developer Tools for Visual Studio 2013 ENU

PowerShell Tools   1.3
Provides file classification services using PowerShell

PreEmptive Analytics Visualizer   1.2
Microsoft Visual Studio extension to visualize aggregated summaries from the PreEmptive Analytics product.

SQL Server Data Tools   12.0.41012.0
Microsoft SQL Server Data Tools

Windows Phone 8.1 SDK Integration   1.0
This package integrates the tools for the Windows Phone 8.1 SDK into the menus and controls of Visual Studio.

Workflow Manager Tools 1.0   1.0
This package contains the necessary Visual Studio integration components for Workflow Manager.

Xamarin   3.11.666.0 (ebae43a)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.

Xamarin.Android   5.1.4.16 (5f55a9ef61c11b6ce0890bc91e4c71b1b92be214)
Visual Studio plugin to enable development for Xamarin.Android.

Xamarin.Forms Intellisense   1.0
Provides intellisense for Xamarin.Forms in the XML editor.

Xamarin.iOS   8.10.2.0 (67b390d0d1bd741582cf7b7fd3ffea08583a3f83)
Visual Studio extension to enable development for Xamarin.iOS.

Xamarin.iOS Unified Migration   1.0
Automated migration for Xamarin iOS Classic projects to Unified

Xamarin.TestCloud.Integration   1.0
Early preview of Xamarin Test Cloud integration