| VB 2005 电子书 Contents Introduction xxv Chapter 1: What Is Microsoft .NET? 1 What Is .NET? 1 A Broad and Deep Platform for the Future 2 What’s Wrong with DNA and COM? 2 An Overview of the .NET Framework 3 The Common Language Runtime 4 Key Design Goals 5 Metadata 7 Multiple-Language Integration and Support 7 A Common Type System 8 Namespaces 8 The Next Layer—The .NET Class Framework 8 What Is in the .NET Class Framework? 9 User and Program Interfaces 10 Windows Forms 11 Web Forms 11 Console Applications 12 Web Services 12 XML as the .NET Metalanguage 12 The Role of COM 13 No Internal Use of COM 13 Some Things Never Change . . . 13 .NET Drives Changes in Visual Basic 14 How .NET Affects You 14 A Spectrum of Programming Models 14 Reducing Barriers to Internet Development 15 Libraries of Prewritten Functionality 15 Easier Deployment 15 The Future of .NET 16 Major Differences in .NET 2.0 16 Summary 17 Chapter 2: Introducing Visual Basic 2005 and Visual Studio 2005 19 Visual Studio .NET—Startup 20 Visual Studio .NET 21 The Solution Explorer 22 My Project 23 References 24 Assembly Information Screen 25 The New Code Window 26 The Properties Window 29 Dynamic Help 30 Working with Visual Basic 2005 31 Form Properties Set in Code 32 Enhancing the Sample Application 34 Adding a Control and Event Handler 34 Customizing the Code 35 Build Configurations 40 Building Applications 43 Useful Features of Visual Studio 46 The Task List 46 The Command Window 47 The Server Explorer 47 Recording and Using Macros in Visual Studio 2005 49 Summary 50 Chapter 3: Variables and Type 51 Differences of Value and Reference Types 52 Value Types (Structures) 54 Primitive Types 54 Explicit Conversions 63 Compiler Options 64 Performing Explicit Conversions 66 Reference Types (Classes) 68 The Object Class 68 The String Class 70 The DBNull Class and IsDBNull() Function 72 Arrays 73 Collections 76 Parameter Passing 78 Contents Retired Keywords and Methods 80 Elements of Visual Basic 6.0 Removed in .NET 80 Summary 81 Chapter 4: Object Syntax Introduction 83 Object-Oriented Terminology 84 Objects, Classes, and Instances 84 Composition of an Object 85 Working with Objects 88 Object Declaration and Instantiation 88 Object References 90 Dereferencing Objects 90 Early versus Late Binding 90 Creating Classes 94 Creating Basic Classes 94 Constructor Methods 114 Termination and Cleanup 115 Advanced Concepts 116 Overloading Methods 116 Overloading Constructor Methods 119 Shared Methods, Variables, and Events 120 Operator Overloading 125 Delegates 128 Classes versus Components 133 Summary 134 Chapter 5: Inheritance and Interfaces 137 Inheritance 138 Implementing Inheritance 140 Multiple Interfaces 187 Object Interfaces 187 Secondary Interfaces 189 Summary 195 Chapter 6: The Common Language Runtime 197 Elements of a .NET Application 198 Modules 198 Versioning and Deployment 201 Better Support for Versioning 201 Better Deployment 202 Cross-Language Integration 203 The Common Type System 203 Metadata 204 Better Support for Metadata 205 Attributes 206 The Reflection API 208 IL Disassembler 209 Memory Management 210 Traditional “Garbage Collection” 211 Faster Memory Allocation for Objects 218 Garbage Collector Optimizations 220 Summary 222 Chapter 7: Applying Objects and Components 223 Abstraction 223 Encapsulation 227 Polymorphism 230 Method Signatures 230 Implementing Polymorphism 230 Inheritance 241 When to Use Inheritance 242 Inheritance and Multiple Interfaces 246 How Deep to Go? 252 Fragile Base Class Issue 254 Summary 257 Chapter 8: Generics 259 Using Generics 260 Generic Types 261 Generic Methods 265 Creating Generics 267 Generic Types 267 Generic Methods 275 Constraints 276 Generics and Late Binding 280 Summary 281 xiii Chapter 9: Namespaces 283 What Is a Namespace? 284 Namespaces and References 287 Common Namespaces 289 Importing and Aliasing Namespaces 291 Importing Namespaces 292 Referencing Namespaces in ASP.NET 293 Aliasing Namespaces 294 Creating Your Own Namespaces 295 My 298 My.Application 299 My.Computer 303 My.Forms 307 My.Resources 308 My.User 308 My.WebServices 308 Summary 309 Chapter 10: Exception Handling and Debugging 311 A Brief Review of Error Handling in VB6 312 Exceptions in .NET 314 Important Properties and Methods of an Exception 314 How Exceptions Differ from the Err Object in VB6 315 Structured-Exception-Handling Keywords in VB.NET 315 The Try, Catch, and Finally Keywords 316 The Throw Keyword 318 Throwing a New Exception 319 The Exit Try Statement 320 Nested Try Structures 321 The Message Property 323 The InnerException and TargetSite Properties 323 Interoperability with VB6-Style Error Handling 328 Error Logging 329 Writing to Trace Files 333 Analyzing Problems and Measuring Performance via the Trace Class 335 Summary 338 ...... |
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