Introduction to .NET Compact Framework Development Mobile Data Synchronisation Techniques

Who Am I?

Microsoft Most Valuable Professional

Agenda Why? Application Development Mobile Data Storage Data Synchronisation Helpful Resources

Why?

Application Development

Mobile Data Storage

Data Synchronisation

Helpful Resources

The Device Landscape Windows Mobile, Pocket PC, SmartPhone, Windows CE Windows XP, Windows Vista, Windows XP Embedded Remote Controls , Wearable Devices, Auxiliary Displays Increasing functionality .NET Micro Framework .NET Compact Framework .NET Framework

.NET Compact Framework 30% functionality in 10% space X86, ARM, SH4, MIPS…. Compatible Base Class Library Bring .NET to devices Performance and Tools Distributed and Data based apps

30% functionality in 10% space

X86, ARM, SH4, MIPS….

Compatible Base Class Library

Windows Mobile History WinPad and Pulsar projects Pegasus Group formed H/PC reference design Componentised Operating System

WinPad and Pulsar projects

Pegasus Group formed

H/PC reference design

Componentised Operating System

Typical Device Specifications Professional 200 – 700 Mhz 32 – 128 MB 128 MB Yes 240 x 320 Standard 100 – 300 Mhz 16 - 64 MB 64 MB No 176 x 220 Processor RAM ROM Touch Screen LCD Resolution

Development Constraints Minimal resources Limited input Touchscreen No kitchen sink style apps

Minimal resources

Limited input

Touchscreen

No kitchen sink style apps

DEMO Smart Device Hello World Application Development

Why mobilise an application? Distributed work forces Competitive advantage Unlock potential of existing data

Distributed work forces

Competitive advantage

Unlock potential of existing data

Rich vs Thin Clients Frequent round trips Requires connectivity Limited controls Easy deployment AJAX and Silverlight

Frequent round trips

Requires connectivity

Limited controls

Easy deployment

AJAX and Silverlight

Occasionally Connected Addressability and identity Dynamic IP addresses Outbound only TCP and HTTP Quality of service Assume you are always offline Need store-and-forward solution

Addressability and identity

Dynamic IP addresses

Outbound only TCP and HTTP

Quality of service

Assume you are always offline

Need store-and-forward solution

Network Aware A dynamic network environment Cost vs Priority decisions Periodic background network checks Notifications and connection status Adaptive application behavior

A dynamic network environment

Cost vs Priority decisions

Periodic background network checks

Notifications and connection status

Adaptive application behavior

SQL Server Benefits Large data source Data is always fresh Rich query capability Limitations Constant connection Scalability (two tier) Query speed .NET Compact Framework ADO.NET Windows Forms SQL Server

SQL Server CE Benefits Local Cache Distribution Size Query Speed Limitations Simpler Data Types Stale Data Sync Complexity .NET Compact Framework ADO.NET Windows Forms SQL Server

SQL Server CE SQL Server Compact Edition 3.5 SQL Server CE SQL Server Mobile SQL Server Everywhere SQL Server Anywhere

SQL Server Compact Edition 3.5

SQL Server CE

SQL Server Mobile

SQL Server Everywhere

SQL Server Anywhere

Design Philosophy Supports desktop and mobile platforms In-process database engine Minimal duplication Strong security

Supports desktop and mobile platforms

In-process database engine

Minimal duplication

Strong security

Compact vs Express

Deployment CAB for PDA MSI for desktop XCOPY style deployment for “non admin” installs…

CAB for PDA

MSI for desktop

XCOPY style deployment for “non admin” installs…

Tool Support SQL Server 2005 Compact Edition Visual Studio 2005 SSMS 2005 SQL Server Compact Edition 3.5 Visual Studio 2008 SSMS 2008

SQL Server 2005 Compact Edition

Visual Studio 2005

SSMS 2005

SQL Server Compact Edition 3.5

Visual Studio 2008

SSMS 2008

Special Features SqlCEResultset Remember classic ADO? Scrollable, Updateable, Sensitive cursor into server side resultset CommandType.TableDirect Bypass the query processor entirely

SqlCEResultset

Remember classic ADO?

Scrollable, Updateable, Sensitive cursor into server side resultset

CommandType.TableDirect

Bypass the query processor entirely

Optimisation Techniques No connection pooling Specify data types within parameterised queries Query plan recompilation Performance Monitoring XML Query Plan Generation Index Stored Procedures!?! sp_show_statistics

No connection pooling

Specify data types within parameterised queries

Query plan recompilation

Performance Monitoring

XML Query Plan Generation

Index Stored Procedures!?!

sp_show_statistics

DEMO SQL Server CE Optimisations

Data Syncronisation Technologies Merge Replication Remote Data Access Web Services Email? Can be complimentary based upon requirements of individual data sets

Technologies

Merge Replication

Remote Data Access

Web Services

Email?

Can be complimentary based upon requirements of individual data sets

Remote Data Access (RDA) Client (PDA) Initiated Pulls one table at a time Device-only change tracking (identity columns problematic) Application submits SQL statement to SQL Server for execution Minimal configuration

Client (PDA) Initiated

Pulls one table at a time

Device-only change tracking (identity columns problematic)

Application submits SQL statement to SQL Server for execution

Minimal configuration

Merge Replication Publisher (Server) Initiated Publications can filter data Horizontally and/or Vertically Bi-directional change tracking Row or Column based Configurable conflict resolution

Publisher (Server) Initiated

Publications can filter data Horizontally and/or Vertically

Bi-directional change tracking

Row or Column based

Configurable conflict resolution

Web Services Abstract the database away from the messaging Disconnected Service Agent Windows Communication Foundation Store and Forward Messaging Leverage ActiveSync AUTD feature and Exchange 2007 Web Services

Abstract the database away from the messaging

Disconnected Service Agent

Windows Communication Foundation

Store and Forward Messaging

Leverage ActiveSync AUTD feature and Exchange 2007 Web Services

ADO.NET Sync Services Uses webservices to syncronise changes Framework of “building blocks” Not yet available for PDA use “ Developers can build sync ecosystems that integrate any application, any data from any store using any protocol over any network”

Uses webservices to syncronise changes

Framework of “building blocks”

Not yet available for PDA use

Hybrid Pattern Disconnected Service Agent Submit new and changed data to server via web service call 2 Mobile Data Gateway Merge/Replication Download reference, read-only data 1 Mobile Data Update Tables on Mobile SQL Server database updated 3

MCTS Exam 70-540 Mobile LOB Accelerator Microsoft Mobile Development Handbook Windows Mobile Data Synchronization with SQL Server 2005 and SQL Server Compact 3.1 Finding out more

MCTS Exam 70-540

Mobile LOB Accelerator

Microsoft Mobile Development Handbook

Windows Mobile Data Synchronization with SQL Server 2005 and SQL Server Compact 3.1

Contact Information Christopher Fairbairn ARANZ Medical Ltd Questions? Email: [email_address] Website: www.christec.co.nz/blog/