ASP.NET 3.5: A Beginner's Guide - www.mustafaof.com

More documents

Recommendations

Info

Chapter 9: Validation Controls 241shows that the CustomValidator does not throw an error, but the validation method(IsValid) can be used to generate C# messages.With the CustomValidator control, the scope of validation events is limitless. Evenwith validators such as the RegularExpressionValidator that can have any number ofdifferent regular expressions used in the validation process, you still need a validatoroption where you can validate anything you want. Chances are, though, that most ofthe validation work you do will be with one of the simpler validation controls. However,the CustomValidator control is there when you need it.Summarizing Validation ErrorsAs you have seen in the discussion of validation, wherever you have an error message,the space taken up by the message leaves a gap. With several different controls usingsome kind of validation control, a page could get cluttered and messy very quickly. Aneasy way to prevent this state of affairs is to use the ValidationSummary control. Withthis control all of the error messages for the page are stored in one place. The kind ofmessage and validation control can be any you want. However, instead of the errormessage displayed in the location where you placed the validation control, all ofthe errors are displayed together. Usually, the summary errors are placed at the endof the form.To see how this works, an application using two TextBox controls with aRequiredFieldValidator control and a RegularExpressionValidator control are set upas they have been in previous examples with one important difference—their Displayproperty is set to None. When the display setting is None, the validation controls stillshow up in the Design mode as taking up space as shown in Figure 9-13. However, as youcan see in Figures 9-14 and 9-15, no space at all is taken up by the area reserved for errormessages. Instead, all of the messages appear at the bottom where the ValidationSummarycontrol is positioned.The example is easy to try. Just put in the controls and labels as shown in Figure 9-13.Where you see the bullet list of error messages is in the ValidationSummary control. Addthe error messages to the two controls and controls to validate, and set the RegularExpressionValidator control’s ValidationExpression to “email”. Remember to also setthe display of both validators to “None”. When you place the ValidationSummary
242ASP.NET 3.5: A Beginner’s GuideFigure 9-13 Validation error messages appear to take up space in Design mode.Figure 9-14 Validation errors appearing in bullet list summary
Page 2 and 3:
ASP.NET 3.5A Beginner’s Guide
Page 4 and 5:
ASP.NET 3.5A Beginner’s GuideWill
Page 6 and 7:
This book is dedicated to Ricky, Ol
Page 8 and 9:
Contents at a GlancePART I Getting
Page 10 and 11:
For more information about this tit
Page 12 and 13:
Contents xiUsing HTML Forms Interac
Page 14 and 15:
Contents xiiiCREATE: The SQL Comman
Page 16 and 17:
Contents xv17 ASP.NET Ajax . . . .
Page 18 and 19:
AcknowledgmentsThis book was greatl
Page 20 and 21:
IntroductionWhat distinguishes the
Page 22 and 23:
Introduction xxiWhat This Book Cove
Page 24 and 25:
Introduction xxiiiChapter 7: CSS fo
Page 26 and 27:
Chapter 17: ASP.NET Ajax One of the
Page 28 and 29:
Part IGetting StartedCopyright © 2
Page 30 and 31:
Chapter 1Introduction toASP.NET 3.5
Page 32 and 33:
Chapter 1: Introduction to ASP.NET
Page 34 and 35:
Page 36 and 37:
Page 38 and 39:
Page 40 and 41:
Page 42 and 43:
Page 44 and 45:
Page 46 and 47:
Page 48 and 49:
Page 50 and 51:
Page 52 and 53:
Chapter 2ASP.NET 3.5 Toolsand Devel
Page 54 and 55:
Chapter 2: ASP.NET 3.5 Tools and De
Page 56 and 57:
Page 58 and 59:
Page 60 and 61:
Page 62 and 63:
Page 64 and 65:
Page 66 and 67:
Page 68 and 69:
Page 70 and 71:
Page 72 and 73:
Page 74 and 75:
Chapter 3C# and ASP.NET 3.5Copyrigh
Page 76 and 77:
Chapter 3: C# and ASP.NET 3.5 49Cas
Page 78 and 79:
Chapter 3: C# and ASP.NET 3.5 51cal
Page 80 and 81:
Chapter 3: C# and ASP.NET 3.5 53Tha
Page 82 and 83:
Chapter 3: C# and ASP.NET 3.5 55A c
Page 84 and 85:
Chapter 3: C# and ASP.NET 3.5 57●
Page 86 and 87:
Chapter 3: C# and ASP.NET 3.5 59tha
Page 88 and 89:
Chapter 3: C# and ASP.NET 3.5 61Ask
Page 90 and 91:
Chapter 3: C# and ASP.NET 3.5 63Sym
Page 92 and 93:
Chapter 3: C# and ASP.NET 3.5 65The
Page 94 and 95:
Chapter 3: C# and ASP.NET 3.5 67Fig
Page 96 and 97:
Chapter 3: C# and ASP.NET 3.5 69}}n
Page 98 and 99:
Chapter 3: C# and ASP.NET 3.5 71ASP
Page 100 and 101:
Chapter 3: C# and ASP.NET 3.5 73Usi
Page 102 and 103:
Chapter 3: C# and ASP.NET 3.5 75Whi
Page 104 and 105:
Chapter 3: C# and ASP.NET 3.5 77ASP
Page 106 and 107:
Chapter 3: C# and ASP.NET 3.5 79Cre
Page 108 and 109:
Chapter 3: C# and ASP.NET 3.5 81Arr
Page 110 and 111:
Chapter 3: C# and ASP.NET 3.5 83Fig
Page 112 and 113:
Chapter 4Doing More withC# and ASP.
Page 114 and 115:
Chapter 4: Doing More with C# and A
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Part IIForms and ControlsCopyright
Page 134 and 135:
Chapter 5HTML Forms: A ReviewCopyri
Page 136 and 137:
Chapter 5: HTML Forms: A Review 109
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Chapter 6Standard Web ControlsCopyr
Page 156 and 157:
Chapter 6: Standard Web Controls 12
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Chapter 7CSS for ASP.NET 3.5Page Fo
Page 202 and 203:
Chapter 7: CSS for ASP.NET 3.5 Page
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219: Chapter 7: CSS for ASP.NET 3.5 Page
Page 224 and 225: Chapter 8Control Events andEvent Ha
Page 226 and 227: Chapter 8: Control Events and Event
Page 242 and 243: Chapter 9Validation ControlsCopyrig
Page 244 and 245: Chapter 9: Validation Controls 217W
Page 246 and 247: Chapter 9: Validation Controls 219F
Page 248 and 249: Chapter 9: Validation Controls 221c
Page 252 and 253: Chapter 9: Validation Controls 225D
Page 254 and 255: Chapter 9: Validation Controls 227R
Page 256 and 257: Chapter 9: Validation Controls 229f
Page 262 and 263: Chapter 9: Validation Controls 235N
Page 264 and 265: Chapter 9: Validation Controls 237A
Page 266 and 267: Chapter 9: Validation Controls 239.
Page 272 and 273: Chapter 9: Validation Controls 245S
Page 274 and 275: Chapter 10Rich Data ControlsCopyrig
Page 276 and 277: Chapter 10: Rich Data Controls 249G
Page 278 and 279: Chapter 10: Rich Data Controls 2513
Page 280 and 281: Chapter 10: Rich Data Controls 253F
Page 282 and 283: Chapter 10: Rich Data Controls 255T
Page 284 and 285: Chapter 10: Rich Data Controls 257A
Page 290 and 291: Chapter 10: Rich Data Controls 263X
Page 292 and 293: Chapter 10: Rich Data Controls 265I
Page 294 and 295: Part IIIASP.NET and DatabasesCopyri
Page 296 and 297: Chapter 11A SQL PrimerCopyright ©
Page 298 and 299: Chapter 11: A SQL Primer 271the dat
Page 300 and 301: Chapter 11: A SQL Primer 273C# inst
Page 302 and 303: Chapter 11: A SQL Primer 275Specify
Page 304 and 305: Chapter 11: A SQL Primer 277ASP.NET
Page 306 and 307: Chapter 11: A SQL Primer 279Looking
Page 308 and 309: Chapter 11: A SQL Primer 281Figure
Page 310 and 311: Chapter 11: A SQL Primer 283The sta
Page 312 and 313: Chapter 11: A SQL Primer 285That is
Page 314 and 315: Chapter 12ADO.NET:Hello DatabaseCop
Page 316 and 317: Chapter 12: ADO.NET: Hello Database
Page 318 and 319:
Chapter 12: ADO.NET: Hello Database
Page 320 and 321:
Page 322 and 323:
Page 324 and 325:
Page 326 and 327:
Page 328 and 329:
Page 330 and 331:
Page 332 and 333:
Page 334 and 335:
Page 336 and 337:
Page 338 and 339:
Page 340 and 341:
Page 342 and 343:
Page 344 and 345:
Page 346 and 347:
Page 348 and 349:
Page 350 and 351:
Page 352 and 353:
Page 354 and 355:
Page 356 and 357:
Chapter 13Data BindingCopyright ©
Page 358 and 359:
Chapter 13: Data Binding 331On the
Page 360 and 361:
Chapter 13: Data Binding 333Figure
Page 362 and 363:
Chapter 13: Data Binding 335Try Thi
Page 364 and 365:
Chapter 13: Data Binding 3377. The
Page 366 and 367:
Chapter 13: Data Binding 339C# TabR
Page 368 and 369:
Chapter 13: Data Binding 341
Page 370 and 371:
Chapter 13: Data Binding 343will we
Page 372 and 373:
Chapter 13: Data Binding 345}}readB
Page 374 and 375:
Chapter 13: Data Binding 347Figure
Page 376 and 377:
Chapter 13: Data Binding 349}ListVi
Page 378 and 379:
Chapter 13: Data Binding 351Summary
Page 380 and 381:
Chapter 14LINQCopyright © 2009 by
Page 382 and 383:
Chapter 14: LINQ 355TIPTry ThisThis
Page 384 and 385:
Chapter 14: LINQ 357Figure 14-2 Add
Page 386 and 387:
Chapter 14: LINQ 359Figure 14-5 Add
Page 388 and 389:
Chapter 14: LINQ 361Figure 14-7 Set
Page 390 and 391:
Chapter 14: LINQ 363Figure 14-9 Set
Page 392 and 393:
Chapter 14: LINQ 365As you can see,
Page 394 and 395:
Chapter 14: LINQ 367Basic LINQC# CS
Page 396 and 397:
Chapter 14: LINQ 369are used with a
Page 398 and 399:
Chapter 15FilesCopyright © 2009 by
Page 400 and 401:
Chapter 15: Files 373The bulk of th
Page 402 and 403:
Chapter 15: Files 375Ask the Expert
Page 404 and 405:
Chapter 15: Files 377Figure 15-2 Te
Page 406 and 407:
Chapter 15: Files 379Figure 15-4 En
Page 408 and 409:
Chapter 15: Files 381As you can see
Page 410 and 411:
Chapter 15: Files 383}}}catch (Exce
Page 412 and 413:
Chapter 15: Files 385The only cauti
Page 414 and 415:
Chapter 15: Files 387Figure 15-7 Vi
Page 416 and 417:
Chapter 16SecurityCopyright © 2009
Page 418 and 419:
Chapter 16: Security 391certain peo
Page 420 and 421:
Chapter 16: Security 393So while yo
Page 422 and 423:
Chapter 16: Security 395ASP.NET Log
Page 424 and 425:
Chapter 16: Security 397Figure 16-4
Page 426 and 427:
Chapter 16: Security 399Try This A
Page 428 and 429:
Page 430 and 431:
Page 432 and 433:
Page 434 and 435:
Page 436 and 437:
Page 438 and 439:
Page 440 and 441:
Chapter 16: Security 413Next, you n
Page 442 and 443:
Chapter 16: Security 41512. With th
Page 444 and 445:
Chapter 16: Security 417SummaryWeb
Page 446 and 447:
Chapter 17ASP.NET AjaxCopyright ©
Page 448 and 449:
Chapter 17: ASP.NET Ajax 421uses st
Page 450 and 451:
Chapter 17: ASP.NET Ajax 423Try Thi
Page 452 and 453:
Chapter 17: ASP.NET Ajax 425Figure
Page 454 and 455:
Chapter 17: ASP.NET Ajax 427Try Thi
Page 456 and 457:
Chapter 17: ASP.NET Ajax 42910. Onc
Page 458 and 459:
Chapter 17: ASP.NET Ajax 431NOTEBy
Page 460 and 461:
Chapter 17: ASP.NET Ajax 433of the
Page 462 and 463:
Chapter 17: ASP.NET Ajax 435body{ba
Page 464 and 465:
Chapter 17: ASP.NET Ajax 437Figure
Page 466 and 467:
Chapter 17: ASP.NET Ajax 439Summary
Page 468 and 469:
Index< > (arrow brackets), 36Aacces
Page 470 and 471:
Index 443ConVarASP.NET, 55C#, 56coo
Page 472 and 473:
Index 445IntelliSense, 27and events
Page 474 and 475:
Index 447StreamReader, 381StreamWri
show all

ASP.NET 3.5: A Beginner's Guide - www.mustafaof.com

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?