E

Edit a project (use case) 362

Edit a resource (use case) 363

edit levels, tracking for child objects 214

n-Level undo functionality and 234

OnInsert method and 236

editable objects

child collections 447-451

child objects 418, 437-441

root collections 443-447

root objects 416, 431-437

updating 416-421

EditLevel property (UndoableBase class) 198

EditLevelAdded property (BusinessCollectionBase class) 236, 242

empty values 76, 346-349

EnableViewState property (.NET)

DataGrid controls 594, 608, 624

ListBox control 623

encapsulation 26, 38,

preserving 64-66, 264

EndEdit method (IEditableObject) 83, 216-218

Enqueue method (BatchQueueService class) 723, 735

Enterprise Manager tool 328, 384

PTracker security and 400

Enterprise Services (COM+) 143-152, 149

disadvantages of 93

Project objects and 470

running transactional DataPortal in 278, 292, 306-310

ServicedDataPortal and 581

using indirectly 148

when to use 483

entry points 776, 782

enum type 152

envelopes, SOAP and 647, 649

Equals method (.NET) 425, 433

event logs 716, 720

events 57, 81-83

inheritance and 182

EventTrackingEnabled attribute 150

Enterprise Services and 310

Exception class (.NET) 302

exceptions 303, 471

Execute method

BatchEntry class 715, 734

IBatchEntry 716, 719, 745

ExecuteNonQuery method (SqlCommand class, ADO.NET) 172

ExecuteReader method (SqlCommand class, ADO.NET) 168

Extension property (Message class) 730

external applications, security and 8