E

early binding, 751

EDI (Electronic Data Interchange), 23

editing Active Directory, 1592–1593

editing commands, WPF, 1158

editing text documents. See CapsEditor application

editing Web Parts, 1292–1295, 1298

EID (Expression Interactive Designer), 1139–1140

Electronic Data Interchange (EDI), 23

elements

assigning styles to specific, 1162–1163

programming WPF, 1136

elements, list

accessing, 275–277

adding, 274–275

inserting, 275

removing, 277

sorting, 280–281

#elif, preprocessor directive, 72–73

Ellipse class, WFP shapes, 1147

else. See if…else statement

#else, preprocessor directive, 72–73

Embedded Resource, 1555–1556

enable cancel, background workers, 585–586

enable progress, background workers, 586–587

EnablePartialRendering property, ScriptManager control, 1317

encoding

StreamReader class, 816–817

StreamWriter class, 818

encryption. See public key cryptography

End Class statement, declaring reference type in Visual Basic, 1623–1624

EndEdit( ) method, data in DataRows, 874

EndGetResponse( ) method, WebRequests, 1342–1345

#endif, preprocessor directive, 72–73

EndInit( ) method, custom controls, 1029–1030

EndInvoke( ) method, delegates, 1441–1442

endpoints, 1362

EndReceive( ) method, asynchronous read, 1498

#endregion, preprocessor directive, 73–74

enterprise policy level, 601

Enterprise Services, 1453–1482

automatic transactions, 1456

Component Services Explorer, 1463–1465

contexts, 1455–1456

creating client application, 1465–1466

creating COM+ application, 1458–1461

deployment, 1461–1463

distributed transactions, 1456

history of, 1454–1455

loosely coupled events, 1457

object pooling, 1457

overview of, 1453–1454

queued components, 1457

role-based security, 1457

sample application, 1468–1478

transactions and, 682, 1466–1468

WCF integration with, 1478–1482

where to use, 1455

entity classes, adding to application, 1469–1472

enum keyword, 1627

enumeration, 56–58

arrays, 146–147

in C#, Visual Basic and C++/CLI, 1627

defining, 57–58

integer types compared with, 56

IsolationLevel, 695–696

message enumerators, 1497–1498

RegexOptions, 236

SecurityAction, 607

EnumFontFamilies, 1109–1111

Environment class, Windows Vista, 1658–1659

environment variables, csc tool and, 31

envoy sinks, 1421

equality operators

comparing reference types, 169–170

comparing value types, 170

Equals( ) method

comparing equality of reference types, 169–170

comparing equality of value types, 170

overview of, 107

#error, preprocessor directive, 73

errors.

See also exception handling

error handling, COM, 754

ErrorMessage property, validation controls, 1229–1330

ErrorProvider component, 1004–1005

message queuing, 1488

ScriptManager control, 1318

escape codes, regular expressions, 234, 237

event handlers

adding to ASP.NET user controls, 1262

application configuration and, 1251

COM, 754

controlling animation with, 1188

defining in AJAX Library, 1328–1331

exchanging data using SOAP headers, 1395–1396

file browser example, 796–799

WPF, 1157–1158

event keyword, in C#, Visual Basic and C++/CLI, 1647–1649

event logging

architecture, 532–533

classes, 534–535

creating event sources, 535–536

event log listeners, 540–541

overview of, 531–532

power events, 745

resource files, 537–540

summary, 546

Windows Services, 744

writing logs, 536

event receivers, 212

event sink, 1448–1449

event triggers

assigning, 1169

properties, 1189

starting animation with, 1186–1189

Event Viewer, 532–533

Event-booking application

client example, 1388–1392

updating. See data binding, ADO.NET and

Web service example, 1383–1388

EventHandler delegate, 213

EventHandler<TEventArgs>, 267

EventLog class, 534–535

EventLogTraceListener class, 531

events.

See also delegates

adding to database, 1242–1244

adding to templates, 1249–1250

in C#, Visual Basic and C++/CLI, 1647–1649

defining class members, 85

delegates for implementing, 196

generating, 215–218

loosely coupled, 1457

overview of, 211–212

receiver’s view of, 212–214

remoting and, 1444–1450

summary, 219

thread synchronization and, 578–580

WorkflowRuntime, 1571

evidence-based security, SQL Server, 956

exception control operator, 156

exception handling, 371–392

base classes, 372–374

in C#, Visual Basic and C++/CLI, 1639–1640

catching exceptions, 374–376

catching exceptions from other code, 380–381

catching user-defined exceptions, 385–387

classes, 372–373, 378–379

consequences of unhandled exceptions, 382

defining exception classes, 390–392

handling different exceptions in different places, 384

modifying exception types, 384

multiple catch blocks, 376–380

in .NET Framework, 16–17

overview of, 371–372

summary, 392

System.Exception properties, 381–382

throwing user-defined exceptions, 387–390

try blocks, nesting, 382–384

user-defined classes, 384–385

in Visual Studio 2005, 430–431

Execute( ) method

Activity class, 1543

creating custom activities, 1550–1551

executing activities, 1549–1550

ParallelActivity, 1547

workflow services, 1572

ExecuteNonQuery( )

adding events to database, 1243–1244

OrderData component, 1475

overview of, 859

ExecuteReader( )

overview of, 860

working with data reader, 867

ExecuteScalar( ), 861

ExecuteXmlReader( ), 859, 861–862

Exists( ) method, List<T> class, 277

explicit conversions, data types, 165–168

explicit renewals, leases, 1426

exposing Web services, 1377–1380

express messages, 1487

Expression Interactive Designer (EID), 1139–1140

expression placeholder, 1246

expression tress, LINQ, 1697–1698

expressions, LINQ

lambda, 1694–1695

query, 1687

extender providers, 1563–1565

ExtenderControl, 1322–1324

Extensible HTML (XHTML), 1302–1304

extension methods, LINQ, 1687–1688

external safety level, SQL Server, 956

external state, 1568

ExternalDataExchangeService, 1578