O

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Page 681

nodes in XML document

adding to XML document, 489–490

recursive walk through, 491–492, 493

NodeType property, of XMLReader object, 478

Nokia, emulators, 661

non–greedy regular expressions, 561

None member

of AcknowledgeTypes enumeration, 359

of RegExOptions enumeration, 549

Northwind database, establishing connection, 403

NoSupportedException, of FileStream.Read method, 221

NotAcknowledgeReachQueue member of

AcknowledgeTypes enumeration, 359

NotAcknowledgeReceive member of AcknowledgeTypes

enumeration, 359

NotFiniteNumberException, 226

Nothing permission set, 251

NoTouchDeployment project, 248–249

NotSupportedException, of Open method, 220

null values

in DataAdapter, 406, 418–419

setting database field to, 401

in XML format, 85

numbers

random, 49–53

real and imaginary, 603–604

undefined, 234

testing for, 235–236

NWOrders project, 81, 81–90

AddDetailLine stored procedure, 524–525

AddHeader stored procedure, 524

adding business rule, 532–535

code, 525–532

committing order to database, 88–90, 530–531

creating and serializing new order, 86–87

deserializing XML into custom class instance, 87–88

deserializing XML representing order, 90

GetProductById stored procedure, 523

GetProductsByName stored procedure, 524

OrderClass class, 519–525

ReadOrder stored procedure, 89–90

ReduceRows subroutine, 531–532

setup project for, 259–260

user interface, 445

NWProducts application, 506–516

architecture, 508–510

code, 510–516

code of search form, 514–515

concurrency handled by, 515

interface, 507, 507–508

O

OAEP, 157

Object Browser, 6

opening, 5

translating information in, 8, 8

object pooling, 469, 469–470

implementing, 470–473

''Object reference not set to an instance of an object" error message, 8, 19

object type, 16

ObjectList control, for mobile computing, 651

objects

accessing members, 10

instantiation, 45

in Microsoft Outlook Library, 109

reflection to learn about, 191

serialization, 59

Office applications, 109–110. See also Excel; Word

Ole Automation, 39

OleDbDataAdapter class (ADO.NET), 392

OleDbPermission code access permission, 252

one–way functions, 154

OnError statement, Resume, 224

OnPaint event, 589

OOP (object oriented programming), 2

Opacity property, of forms, 636, 638

Open method, exceptions, 219–220

OpenRead method, of WebClient class, 309

Openwave, emulators, 661

OpenWrite method, of WebClient class, 309

optimistic concurrency, 407, 516

Option Base statement, 28, 29

OR Boolean operator, for DataView object, 426

order processing with messages, 373–381, 374

committing order to database, 380–381

deleting order and related message, 381

message retrieval from queue, 378–379

order preparation, 375–377

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