An Overview of .NET: An Overview of .NET Edmund Quek Developer & Platform Evangelism Microsoft APAC & GC Region


.NET – what is it?: Microsoft .NET is a set of software technologies designed to connect your world of information, people, systems, and devices. .NET – what is it?


No really – what is it?: The .NET Framework is a component of the Windows operating system that provides the programming model for building, deploying and running Web-based applications, smart client applications and XML Web services. No really – what is it?


.NET for Developers: .NET for Developers Productivity The most productive development environment The most productive language – Visual Basic .NET .NET Framework Better Web Development Better Forms Development Better Integration Robustness Common Language Runtime: Managed Code Automatic lifetime management Side-by-side versioning Exception handling The Future Windows Codename “Longhorn”: the next major platform update.


Simplified development: Simplified development HWND hwndMain = CreateWindowEx( 0, "MainWinClass", "Main Window", WS_OVERLAPPEDWINDOW | WS_HSCROLL | WS_VSCROLL, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, (HWND)NULL, (HMENU)NULL, hInstance, NULL); ShowWindow(hwndMain, SW_SHOWDEFAULT); UpdateWindow(hwndMain); Form form = new Form(); form.Text = "Main Window"; form.Show(); Windows API .NET Framework


What is the .NET Framework?: What is the .NET Framework? The Common Language Runtime Managed execution environment Memory management Debugging/profiling support Code access security … Framework Class Library .NET application foundation classes


.NET Framework Schematic: .NET Framework Schematic


Slide8: Framework Class Library


CLR Execution Model: VB Source code Compiler C++ C# Compiler Compiler Assembly IL Code Assembly IL Code Assembly IL Code Operating System Services - Windows Common Language Runtime JIT Compiler Native Code Managed code Unmanaged Component CLR Execution Model Class Loading and Layout Execution support Garbage Collection Security


Formal CLR goals: Formal CLR goals Multi-language, secure, mobile code Interoperability with existing systems Integrated tools support Simplified programming model Scalable from server to small device Side-by-side versioning


What does MSIL look like?: What does MSIL look like? .method private hidebysig static void Main(string[] args) cil managed { .entrypoint // Code size 24 (0x18) .maxstack 2 .locals init (int32 V_0) IL_0000: ldc.i4.0 IL_0001: stloc.0 IL_0002: br.s IL_0012 IL_0004: ldstr "Hello world!" IL_0009: call void [mscorlib]System.Console::WriteLine(string) IL_000e: ldloc.0 IL_000f: ldc.i4.1 IL_0010: add IL_0011: stloc.0 IL_0012: ldloc.0 IL_0013: ldc.i4.s 10 IL_0015: blt.s IL_0004 IL_0017: ret } // end of method class1::Main


.NET Languages: .NET Languages The .NET Platform is multi-language Benefits: Make code modules reusable Complete cross-language integration Make API access the same for all languages Let developers use the right language for the task and share the code All .NET languages are first-class players Performance roughly equal Can use all .NET features


.NET Languages (cont…): .NET Languages (cont…) Microsoft is providing: Visual Basic Visual C++ Visual C# Visual J# and JScript® Industry and Academia APL, AsmL, COBOL, Eiffel, F#, Forth, Fortran, Haskell, Java, Mercury, ML, Mondrian, Oberon, P#, Pascal, Perl, Powerbuilder, Python, RPG, Ruby, S#, Scheme, Smalltalk


Windows FormsRich smart-client application development made easy: Windows Forms Rich smart-client application development made easy Framework for building Windows client applications that utilize the common language runtime. System.Windows.Forms namespace. Can be written in any language that CLR supports. RAD simplicity inherited from VB 6.0 paradigm Improved versioning and deployment Takes full advantage of the security features of the common language runtime Better graphics – GDI+ (alpha blending, texture brushes, advance transforms)


ASP.NETSimplified development of scalable Web applications: ASP.NET Simplified development of scalable Web applications A complete environment for building, deploying and running .NET Web applications Flexible language options Web Forms – System.Web.UI namespace Separates UI and code with Server Controls Supports compiled code rather than scripts Easy and familiar development model Rich class framework Target any browser on any platform Improved reliability, performance and scalability New application models XML Web Services ASP.NET Mobile controls


.NET Compact FrameworkMobile and smart device development: .NET Compact Framework Mobile and smart device development Small footprint, binary compatible version of the .NET Framework, designed for small mobile devices. Enables RAD development for devices Design and code editing customized for devices Integrated device support High fidelity device emulation Rich debugging in the emulator or on device Same C# and Visual Basic compiler Enables devices to interoperate easily with XML Web services.


ASP.NET Benchmarks: ASP.NET Benchmarks 2400 1200 1600 800 400 2800 2000 PC Magazine - Nile Application Test WebSphere 3.5 JSP RH Linux 7.0 Oracle 8i Microsoft ASP (VBScript) SQL Server 2000 Microsoft ASP.NET (Visual C#) SQL Server 2000 1000 789 603 8 CPU 4 CPU 2 CPU 330 748 637 Pages Served per Sec


.NET Pet ShopWindows 2000 vs. Windows Server 2003 Benchmark: .NET Pet Shop Windows 2000 vs. Windows Server 2003 Benchmark http://www.middleware-company.com/documents/j2eedotnetbenchmark.pdf Ç91% Ç34% Ç70%


Developer Productivity: Developer Productivity Productivity: One third the code Performance: 28 times faster Scalability: 6 times more users See www.gotdotnet.com


Visual Studio .NET: Visual Studio .NET Comprehensive best-of-breed tool for building connected applications based on .NET for Windows and the Web All languages under one roof All application types under one roof Consistent programming model for all application types Enterprise Lifecycle Support (ACT, VSS, Visio, Enterprise Templates)


Developer Productivity Features: Developer Productivity Features Increased IDE Performance Startup time reduced Improved IntelliSense® Dynamic help faster Object browser faster Code editor drop-down menus faster Enhanced “Add Web Reference” dialog Code editor enhancements New components Debugging enhancements Designer enhancements Schema designer zoom Mobile Web form designer Integrated community search Run multiple version of Visual Studio side-by-side: Visual Studio 6.0 Visual Studio .NET 2002 Visual Studio .NET 2003 Upgrade from Visual Studio .NET 2002 to Visual Studio Only the project files are updated Doesn’t change any of your source files Visual Basic .NET Fully object-oriented Free threading, structured exception handling Host VB6.0 controls in WinForms applications Improved IntelliSense and debugger Variable declaration in loops Bitshift operators Mobile applications Microsoft® Visual C++® .NET Managed extensions for C++ ISO C++ conformance Windows Forms designer Enhanced floating point performance optimizations P4 targeting Microsoft® Visual C# ® .NET Component-oriented, type-safe Improved IntelliSense Custom build steps Code insertion for common tasks Mobile applications Microsoft® Visual J#™ .NET Java-language syntax Full integration with Visual Studio .NET Easy way to move Java-language skills, Full access to the .NET Framework


demo: demo Introduction to Visual Studio .NET