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Occasionally Connected Smart Clients Steve Lasker Program Manager Visual Studio Microsoft Corporation [email protected] blogs.msdn.com/SmartClientData What Is: Occasionally Connected Empowering users to leverage their computer, applications, data and files regardless of network availability Application proactively retrieves necessary data necessary to work offline As the network comes available, the application will automatically sync their work and log conflicts for the user to resolve Network operations occur in the background so the user can stay focused on their task Example: Outlook 2003 2 Agenda Resources for working offline Occasionally Connected Systems Common Architecture Demo Scenario Demo Architecture Database Options Sync Options Application Updates Running Background Tasks Asynchronously 3 Resources Needed Offline Data A subset of the data from the server(s) Heterogeneous Sync (SQL Server, Oracle, DB2, …) Files Not all data exists within the database Media files, Office Files, … Application Messaging (Web Services, WCF, …) Ability to queue outbound messages Ability to async process inbound messages Read Only Informational/Reference Data Services Ability to pre-fetch data from existing services 4 Occasionally Connected Smart Client Smart Client Application / UI Canned UI Controls Data Sync Services File Sync Services Message Queuing Data Access API Visual Studio Network Resources Background Tasks Message Caching Application Updates Files Data Store Microsoft Windows / Windows Mobile 5 Adventure Works Sales Field Sales Multi-level marketing Consumers sell Adventure Works Products Need for the app to run disconnected Sellers are independent Hardware not owned by Adventure Works Many platforms Browser Desktop Tablet PC Pocket PC Smart Phone 6 Adventure Works Sales Architecture Weather Services Adventure Works Sales Smart Client Background Tasks Desktop Sync Services Network Services Order Service s Data Server Sync Service s Adventure Works Corp TabletPC PocketPC Smart Phone App Logic Weather Caching Order Submission Queue App Updates Data Store Promo Videos •Product Catalog •My Customers •Order Scratchpad •My Inventory 7 Which Local Data Store? Microsoft Database Technologies SQL Server 2005 SQL Server Express Edition SQL Server Mobile Edition Jet (Access) Microsoft Visual FoxPro (.dbf) Excel XML WinFS Something new 8 SQL Server Express Great improvements over MSDE Simple install from web or local MSI ClickOnce will BootStrap SSE if not installed Connect w/File Path Connection String User Instance feature for File Path Connecitons Great for VS Development 9 Deploying SSE For Occasionally Connected Scenarios Base Install of SSE ClickOnce Bootstrapper Requires Admin Rights Replication w/SSE Replication not supported w/User Instances Enable SQL Server Authentication Add DBO Privileged Account Script creation of database Verify / Create / Attach database at startup Deploy SQL Server Replication .Dlls 10 Occasionally Connected Devices Servers Desktops Laptops Tablet PC’s Windows CE Pocket PC Smart Phone ? Win 32 Sweet spot 11 Windows CE Device Pocket PC Smart Phone SQL Mobile Win 32 SQL Server Express Workgroup Desktop Laptop Tablet PC Single User Scenarios Server SQL Multi User Server Local Database Options 12 Deploying SQL Server Mobile SQL Server Mobile Engine Add runtime dlls to project (sqlce*.dll) C:\Program Files\Microsoft Visual Studio 8\Common7\IDE File size <1.4mb Set files to Copy to Output Directory = Copy if newer ADO for SQL Server Mobile Add reference to Microsoft SQL Mobile Located in: C:\Program Files\Microsoft Visual Studio 8\ _ Common7\IDE\PublicAssemblies\System.Data.SqlServerCE.dl l File Size ~224k 13 Deploying SQL Server Mobile 14 SQL Server Mobile Runtime .dll file Functionality sqlcese30.dll sqlceqp30.dll SQL Server Mobile Engine. SQL Server Mobile Query Processor. Required for all SQL Server Mobile applications. Required for ADO.net, System.Data.SqlServerCe.dll Contains error strings for SQL Server Mobile-generated errors. sqlceme30.dll sqlceer30[language].dll Required for all SQL Server Mobile applications. sqlceca30.dll sqlcecompact30.dll sqlceoledb30.dll The SQL Server Mobile Client Agent. Required for applications that connect to SQL Server by using replication or remote data access. Provides the compact database functionality. Provides OLE DB connectivity to SQL Server Mobile databases. Required only if your application uses OLE DB to connect to the SQL Server Mobile database. Used by RDA. Total File Size 1.34mb 15 How - To Sync Technology XML - DataSets SQL Server Express SQL Server Mobile Roll your own Merge Replication Remote Data Access Roll your own Ultimate in flexibility Highest cost to develop and maintain Merge Replication Most power, broadest features for different data partitions, spans all devices Need DBO/DBA privileges, must “own” server Remote Data Access (RDA) Easy entry point for well partitioned data, no config to database Limited to SQL Server Mobile 16 RDA Sync Architecture Local App UI DAL Database Engine RDA Sync Engine IIS w / Sync ISAPI dll Server Data Out In SQL Server Mobile 17 RDA: Initializing Reference Data Accounting Logic Logic Transport WCF Queue Controls Validation Logic* Transport Smart Client Sales Logic Rules WCF Cache RDA.Pull(“Products", _ "SELECT ProductId, Name, Description, Category, UnitPrice " & _ "FROM Products", _ ReferenceInventory My.Settings.ServerOleDBConnectionString, _ Data Logic Product Logic RdaTrackOption.TrackingOff) Rules Rules Fulfillment Sync Sync Client Local Data Store Catalog Logic Rules 18 RDA: Initializing Updatable Data Sales Logic Rules UpdateableInventory Data Logic Customers Rules Fulfillment Sync Sync Client Local Data Store Accounting Rules Logic WCF Cache Rda.Pull(“Customers", _ "SELECT CustomerId, Name, Address, Phone, Fax" & _ "FROM Customers", _ My.Settings.ServerOleDbConnectionString, _ Logic RdaTrackOption.TrackingOn) Logic Transport WCF Queue Controls Validation Logic* Transport Smart Client Logic Rules 19 RDA: Pushing Changes Back Logic Rules Fulfillment Sync Sync Client Local Data Store Sales Logic Rules Inventory Logic Rules Updateable Data Customers Accounting Logic Logic WCF Cache Rda.Push(“Customers", _ My.Settings.ServerOleDbConnectionString, _ SyncBatching.BatchingOn) Transport WCF Queue Controls Validation Logic* Transport Smart Client Logic Rules In 20 Incorporating WCF w/RDA Accounting Logic Sales Logic Rules Inventory Logic Rules Logic Rules Fulfillment Sync Sync Client Local Data Store Logic WCF Cache Transport WCF Queue Controls Validation Logic* Transport Smart Client Logic Rules 21 Remote Data Access (RDA) 22 Configuring RDA Configure Web Sync Point Write client side code Dim rda As New SqlCeRemoteDataAccess() rda.InternetUrl = "http://www.YourCompany.com/SqlMobileSync/sqlcesa30.dll" rda.LocalConnectionString = "Data Source =.\AdventureWorksSales.sdf" rda.Pull("LocalTableName", _ Dim rda As New SqlCeRemoteDataAccess() "Query To Execture on the Server", _ rda.InternetUrl = "http://www.YourCompany.com/SqlMobileSync/sqlcesa30.dll" "OLEDB ConnectionString from Web Server to SQL Server", _ rda.LocalConnectionString = "Data Source =.\AdventureWorksSales.sdf" RdaTrackOption.TrackingOnWithIndexes, _ rda.Pull("Customer", _ "Local Table for Errors on Push") "SELECT CustomerID, Name, FROM Customer ", _ "Provider=SQLOLEDB.1;Data Source=YourSQLServer;" & _ "User ID=YourServerUserName;Password=YourServerPassword;" & _ "Initial Catalog=AdventureWorksSales", _ RdaTrackOption.TrackingOnWithIndexes, _ "Customer_Errors") 23 RDA Limitations Based on Snapshot Push, Push, Push Changes at server aren’t pulled down until next snapshot Limits the Product Catalog scenarios Updates are limited to last client wins Comparison based on PK only 24 App Updates With ClickOnce ClickOnce Background API’s Imports System.Deployment.Application.ApplicationDeployment ... Private Function CheckForAppUpdates() As UpdateCheckInfo If ApplicationDeployment.IsNetworkDeployed Then Dim updateInfo As UpdateCheckInfo updateInfo = CurrentDeployment.CheckForDetailedUpdate() If updateInfo.UpdateAvailable Then ' download the update If ApplicationDeployment.CurrentDeployment.Update() Then ' Update Downloaded End If End If Return updateInfo End If End Function 25 App Updates - ClickOnce 26 BackgroundTasks / Steps Runs on a background thread of the application Executes collection of steps Start / Stop similar to Windows Services Executes in a loop based on a Timer Can be triggered by Network Resources Marshals progress / completed info to UI thread 27 Background Tasks 28 Summary Smart Client Advantages Ability to work offline Ability to work on behalf of the user Leverage, embrace reference data Leverage Microsoft local data stores SQL Server Express Edition SQL Server Mobile Edition Build sync APIs as background tasks Composable Sync APIs are coming… Leverage Occasionally Connected Systems Architectures to be well positioned Leverage ClickOnce APIs for updates 29 Resources Data Designers & Occasionally Connected Systems Discussions: http://blogs.msdn.com/SmartClientData Drag Once Databinding: http://www.Code-Magazine.com/Article.aspx?quickid=0409051 Drag Once w/Custom Controls: http://www.Code-Magazine.com/Article.aspx?quickid=0411071 Windows Forms: http://www.WindowsForms.net http://msdn.Microsoft.com/WindowsForms/ http://forums.Microsoft.com/msdn/default.aspx?ForumGroupID=2 Data Runtime: http://msdn.Microsoft.com/Data/ Patterns & Practices: http://msdn.microsoft.com/library/default.asp?url=/library/enus/dnpag/html/SCAG.asp 30 Community Resources At PDC For more information, go see Wed 1pm & 3:15pm PRS402 Erik Ellis Harnessing the Power and Flexibility of Windows Forms 2.0 Thur 11:30am PRS321 Mark Boulter Windows Forms: Integrating Windows Forms and Windows Presentation Foundation ("Avalon") Fri 10:30am PRS334 Chris Sells, Doug Purdy Windows Presentation Foundation ("Avalon") + Windows Communications Foundation ("Indigo") = Magic Fri 1pm FUN222 Jamie Cool What’s New in Software Installation for Windows Vista: Exploring the Windows Installer (MSI) and ClickOnce Options Labs: FUNHOL15 ClickOnce Deployment PRSHOL17 New UI Features in Windows Forms PRSHOL18 New Data Features in Windows Forms PRSHOL19 Windows Forms: Advanced Layout Ask The Experts 31 © 2005 Microsoft Corporation. All rights reserved. This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.
