O

Object Browser window

accessing, 221

ReadKey() method, 222

object Deserialize() method, 727

Object Management Group (OMG) Web site, 654

Object() method, 211

object source parameter, 375

ObjectDataSource data control, 613

Object.Equals() method, 306

object-oriented programming (OOP)

custom exceptions, 365–366

discussed, 182

events, 198

inheritance, 191–193

monolithic applications, 182

.NET Framework and, 4

:: operator, 363–365

operator overloading, 197–198

polymorphism, 193–195

reference versus value types, 198

structs, 199

traditional programming techniques, 182

in Windows application exercise, 199–202

objects

accessibility, 185

ADO (ActiveX Data Objects), 772

classes and, 183–184, 188

Command, 775

CommandBuilder, 775

comparisons between, 297–302

Connection, 775

constructors, 187

copying, 234

DataAdapter, 775

DataGridView

controls, 844

database connections, 841

discussed, 840

formatting, 842–843

DataReader

overview, 775

reading data with, 779–783

DataRelation, 776, 804

DataSet

columns, rows, and tables, 786–787

Fill() method, 786

overview, 776

reading data with, 787–788

DataTable, 776

destructors, 187

Dictionary<K, V>, 343–344

disposable, 190, 983–984

ElapsedEventArgs, 370

fields and, 184–185

int type and, 186

interfaces, 189–190

lifecycle of, 187

List<T>, 335–336

methods and, 186

properties and, 184–185

reference types, 233

relationships between, 195–197

System.Object class

Equals() method, 212

GetHashCode() method, 213

GetType() method, 213

MemberwiseClone() method, 212, 234, 292

Object() method, 211

ReferenceEquals() method, 212

ToString() method, 212, 259, 297

UML (Universal Modeling Language), 183

Obsolete attribute, 892

OCI (Oracle Call Interface), 772

ODBC (Open Database Connectivity), 772

OMG (Object Management Group) Web site, 654

OnBeginPrint() method, 513

OnDownloadFile() method, 970

OnFileNew() method, 509

OnFileOpen() method, 509

OnFileSaveAs() method, 509

OnPaint() method, 982

OnPrintPage() method, 513

OOP (object-oriented programming)

custom exceptions, 365–366

discussed, 182

events, 198

inheritance, 191–193

monolithic applications, 182

.NET Framework and, 4

:: operator, 363–365

operator overloading, 197–198

polymorphism, 193–195

reference versus value types, 198

structs, 199

traditional programming techniques, 182

in Windows application exercise, 199–202

Open Database Connectivity (ODBC), 772

Open Group Web site, 654

Open() method, 704

Open property, 708

Open Software Foundation (OSF), 654

OpenFile() method, 501, 507

OpenFileDialog class, 492

OpenOrCreate property, 708

OpenRead() method, 962

OpenWrite() method, 963

operands, 43

operators

??, 329–330

::, 363–365

as, 321–322

assignment, 49, 64–65

binary, 44, 304, 306

bitwise, 60–63

comparison, 58

conditional, 44, 59

generic classes, 356–357

is, 299–302

mathematical

addition (+), 44

decrement (--), 45

division (/), 44

explicit conversion, 45

implicit conversion, 45

increment (++), 45

multiplication (*) operator, 44

remainder (%), 44

subtraction (-), 44

type conversion, 48

variable manipulation, 46–48

operator precedence, 49–50, 66

overloaded, 197–198

overloading, 302–306

relational, 58

ternary, 44, 68

typeof, 103

unary, 44, 304, 306

optional files, Simple Editor application, 570

Options dialog box, Visual Studio, 31

Oracle Call Interface (OCI), 772

Oracle databases, 777

orientation, print page setup, 520

OSF (Open Software Foundation), 654

OSI layers, networking, 953–954

out keyword, 186

out parameters, 132–133

outer variables, 379

outlining system, Visual Studio, 27

output classes, 702–703

output streams, 702

Output window, debugging, 153

overflow, explicit conversion, 93

overloaded operators, 197–198

overloading

conversion operators, 319–320

functions, 144–146

operators, 302–306

override keyword

classes, 250–251

method definitions, 239

overriding methods, 239