DEV200 NET Framework Overview EWU EWU HomeNET框架概述 DEV200 EWU EWU家.ppt

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DEV200 NET Framework Overview EWU EWU HomeNET框架概述 DEV200 EWU EWU家.ppt

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DEV200 NET Framework Overview EWU EWU HomeNET框架概述 DEV200 EWU EWU家

DEV200 .NET Framework Overview Chris Anderson Software Architect, .NET ClientMicrosoft Corporation .NET Framework Design Goals Dramatically simplifies development and deployment Unifies programming models Provides robust and secure execution environment Supports multiple programming languages Framework, Languages, And Tools Demo: One Lap Around .NET Create a simple Web Service Test it in Internet Explorer Add data logic to it Build a smart client for it Show seamless and safe deployment of the smart client Framework, Languages, And Tools The .NET Evolution The .NET Evolution The .NET Evolution Compilation And Execution Simplify Development Completely eliminates COM plumbing No more… Registration GUIDs .IDL files HRESULTs IUnknown AddRef/Release CoCreateInstance Simplify Development Common Type System Common instance and type definition Enables clean OO programming Classes and interfaces Constructors, properties, methods, events Cross language inheritance Built-in interoperability With COM With native (Win32? style) DLLs Everything Is An Object Traditional views of primitive types C++, Java?: They’re “magic” Smalltalk, Lisp: They’re full-blown objects .NET Framework solution: Value types unifies with no performance cost Deep simplicity throughout system Improved extensibility and reusability New primitive types: Decimal, SQL… Collections, etc., work for all types Everything Is An Object Boxing Allocates box, copies value into it Unboxing Checks type of box, copies value out Robust Environment Automatic lifetime management All objects are garbage collected Exception handling Error handling first class and mandatory Type-safety No buffer overruns, No unsafe casts, Uninitialized variables Secure Environment Security designed-in Code access security enforcement Security based on the identity of code Administratively configurable via policy ASP.NET integrated authentication of user Windows identity, Passport?, forms-based, … Cryptography library with XML D