Visaul Basic.NET编程语言 英文版PDF电子书下载

Chapter 1：Language Overview 1

Hello，World！ 1

Chapter 1：Language Overview 1

1　Language Overview 1

Fundamental Types 3

TABLE 1-1：Fundamental Types 3

TABLE 1-2：Numeric Operators 4

TABLE 1-3：Logical Operators 5

TABLE 1-4：Comparison Operators 5

TABLE 1-5：String Operators 5

TABLE 1-6：Conversion Operators 7

FIGURE 1-1：A One-Dimensional Array 8

Arrays 8

FIGURE 1-2：A Multidimensional Array 9

FIGURE 1-3：An Array of Arrays 10

FIGURE 1-4：A Jagged Array 11

Statements 11

Exception Handling 15

Structured Exception Handling 16

Unstructured Exception Handling 17

Memory Management 17

FIGURE 1-5：A Reference Type Variable and the Heap 18

FIGURE 1-6：A Value Type Variable 19

Classes，Structures，and Modules 19

Accessibility 21

Constructors 21

Nested Types 22

Fields 23

Parameters 24

Methods 24

Declare Statements 26

Properties 28

Events 30

Declarative Event Handling 31

Dynamic Event Handling 31

Namespaces 32

Delegates 34

Inheritance 36

Protected Access 37

Overriding 39

Interfaces 41

Attributes 42

Versioning 44

Conclusion 45

Chapter 2：Basic Concepts 47

2 Basic Concepts 47

Language Fundamentals 47

Case Insensitivity 48

Line Orientation 49

Comments 52

Declarations and Names 53

Forward References 56

Accessibility 57

FIGURE 2-1：The.NET Framework 59

The.NET Framework 59

Program Startup and Termination 60

Conclusion 61

Chapter 3：Fundamental Types 63

3　Fundamental Types 63

Boolean 63

TABLE 3-1：FundamentalTypes 64

Integer Data Types 65

Integer Literals 66

Floating-Point Data Types 68

Floating-Point Literals 69

Decimal Data Type 70

Decimal Literals 71

Char and String Literals 72

Char and String Data Types 72

Date Data Type 73

Date Literals 73

Object Data Type 74

Conversions 76

TABLE 3-2：Conversion Operators 77

Widening and Narrowing Conversions 79

Supported Conversions 80

Conclusion 82

Arrays 85

Chapter 4：Arrays and Enumerations 85

4 Arraysand Enumerations 85

FIGURE 4-1：A One-Dimensional Array 86

ReDim and Erase Statements 86

FIGURE 4-2：A Two-Dimensional Array 87

Array Initializers 89

Arrays of Arrays 90

FIGURE4-3：A Jagged Array 91

Enumerations 92

Underlying Types 93

Conversions 95

Conclusion 97

Chapter 5：Operators 99

Chapter 5：Operators 99

5 Operators 99

Precedence 99

TABLE 5-1：OperatorPrecedence 100

Operator Resolution 101

TABLE 5-2：Arithmetic Operators 103

Arithmetic Operators 103

Comparison Operators 104

TABLE 5-3：Comparison Operators 104

Logical and Bitwise Operators 106

FIGURE 5-1：And Operation 108

Shift Operators 108

FIGURE 5-2：Left and Right Shifting 108

String Operators 109

FIGURE 5-3：Right Shifting with Sign Preservation 109

Type Operators 111

Conclusion 113

Constant Expressions 113

Local Declaration Statements 115

6 Statements 115

Initializers 117

Type Characters 117

Constants 118

Static Locals 119

Implicit Locals 120

Assignment 122

With Statement 123

Conditional Statements 124

If Statement 124

Select Statement 125

Looping Statements 127

For Statement 127

For Each Statement 129

While and Do Statements 131

Collection Types 132

Branching Statements 134

Exit and Return Statements 134

Goto Statement and Labels 135

Program Flow Statements 137

SyncLock 138

Conclusion 140

7 Exceptions 143

Chapter 7：Exceptions 143

Throwing Exceptions 144

TABLE 7-1：Common Exception Types 145

Structured Exception Handling 146

Rethrowing Exceptions 148

Unstructured Exception Handling 149

Resume and Resume Next 152

Conclusions 153

Modules 155

8 Modules and Namespaces 155

Namespaces 157

Fully Qualified Names 160

Imports 161

Preprocessing 164

Conditional Compilation Statements 164

Region Statements 166

Conclusion 167

9 Classes and Structures 169

Memory Management 169

Chapter 9：Classes and Structures 169

FIGURE 9-1：A Reference Type Variable and the Heap 170

The Heap and the Stack 170

Value Types and Structures 171

FIGURE 9-3：An Integer Array 172

FIGURE 9-2：An Integer Variable 172

Reference Types and Classes 173

Shared versus Instance 176

Constructors 178

Structure Constructors 180

Nested Types 181

Shared Constructors 181

Finalization and Resource Disposal 182

Conclusion 185

10 Methods 187

Subroutines and Functions 187

Parameters 188

Optional Parameters and Parameter Arrays 190

Method Invocation 193

Arguments and Reference Parameters 194

Named Arguments 196

Late Binding 196

ConditionalMethods 198

Overloading 199

Overload Resolution 202

Declare Statements 205

Character Translation 207

String Parameters 208

Conclusion 211

11 Fields and Properties 213

Fields 213

Read-Only Fields 214

Properties 216

Indexed Properties 220

Default Properties 223

Dictionary Lookup 224

Conclusion 225

12 Events and Delegates 227

Defining and Raising Events 227

Declarative Event Handling 229

Handling Events Dynamically 231

Delegates 233

Asynchronous Invocation 237

Delegates and Event Implementation 239

Conclusion 243

13 Inheritance 245

Chapter 13：Inheritance 245

Protected Accessibility 248

FIGURE 13-1：An Inheritance Hierarchy 248

Conversions 250

Array Covariance 252

The.NET Framework Type Hierarchy 254

FIGURE 13-2：The.NET Framework Type Hierarchy 255

DirectCast 256

FIGURE 13-3：Boxing an Integer Value 256

FIGURE 13-4：Unboxing an Integer Value 257

Overriding 259

MyBase and MyClass 263

Abstract Classes and Methods 265

Conclusion 268

14 Interfaces 269

Defining Interfaces 270

Implementing Interfaces 271

Private Interface Implementation 273

Event Implementation 275

Consuming Interfaces 277

Interface Inheritance 278

Conclusion 281

Chapter 15：Attributes 283

15 Attributes 283

Applying Attributes 284

Defining Attributes 287

TABLE 15-1：AttributeTargets Values 289

Storing and Reading Attributes 291

Conclusion 293

16 Versioning 295

Shadowing 295

Shadowing and Overriding 298

Shadowing and Accessibility 300

Default Properties 301

Overloading 302

Obsolete 305

Conclusion 306

AppWinStyle Enumeration 307

A Runtime Functions 307

Appendix A：Runtime Functions 307

CallType Enumeration 308

Collection Class 309

ComClassAttribute Attribute 310

CompareMethod Enumeration 311

ControlChars Class 312

Constants Module 312

Conversion Module 313

DateAndTime Module 315

DateFormat Enumeration 319

DateInterval Enumeration 319

DueDate Enumeration 321

ErrObject Class 321

FileAttribute Enumeration 323

FileSystem Module 324

TABLE A-1：FileSystem Equivalents 325

Financial Module 332

FirstDayOfWeek Enumeration 335

FirstWeekOfYear Enumeration 336

Globals Module 336

Information Module 337

Interaction Module 340

MsgBoxResult Enumeration 343

Button Flags 344

MsgBoxStyle Enumeration 344

Icon Flags 345

Miscellaneous Flags 346

Message Box Behavior Flags 346

Default Button Flags 346

OpenMode Enumeration 347

OpenAccess Enumeration 347

OpenShare Enumeration 348

Strings Module 349

Format Strings 356

TABLE A-2：Numeric Predefined Formats 356

TABLE A-3：Date/Time Predefined Formats 357

TABLE A-5：Numeric User-Defined Format Characters 358

TABLE A-4：Other Predefined Formats 358

TABLE A-6：Date/Time User-Defined Format Characters 359

TriState Enumeration 361

VariantType Enumeration 362

VbStrConv Enumeration 364

VBMath Module 366

VBFixedArrayAttribute Attribute 367

VBFixedStringAttribute Attribute 368

Classes 369

Type System Additions 369

B Making the Transition from COM to the CLR 369

Inheritance 372

Overloading 376

Arrays 378

Type System Modifications 378

Namespaces 378

Variant and Object 380

Structures 383

Date，Currency，and Decimal 384

Platform Changes 385

Deterministic Finalization and Garbage Collection 385

Let and Set Assignment 387

Late Binding 389

On Error and Structured Exception Handling 390

Events and Delegates 394

Language Cleanup 396

Index 399