ASP .NET Web Developer s Guide - Mesbah Ahmed, Chris Garrett
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660 Chapter 13 • Creating a Message Board with ADO and XML
Designing the Browsing Interface
;Create the Board browsing. Create the Web Form and use the Repeater control and DataBind it to a DataSet.
;Create the Thread browsing. Create the Web Form and use the Repeater control and DataBind it to a DataSet.
;Create the Post browsing. Create the Web Form and use the Repeater control and DataBind it to a DataSet.
Creating the User Functions
;Generate the Thread creation. Create the Web Form and use Validation controls and text boxes to get the necessary information.
;Generate the Post creation. Create the Web Form and use Validation controls and text boxes to get the necessary information.
Building the Administrative Interface
;Create the interface to ban and promote users. Make sure only administrators can access this functionality using the properties built into the FormBase class.
;Create the interfaces necessary to delete Board,Thread, and Post pages. Modify the existing View Board,Thread, and Post pages to create the links to the delete pages.
;Create the interfaces necessary to edit Posts. Modify the existing view Post page to create the links to edit Posts.
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Creating a Message Board with ADO and XML • Chapter 13 |
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Frequently Asked Questions
The following Frequently Asked Questions, answered by the authors of this book, are designed to both measure your understanding of the concepts presented in this chapter and to assist you with real-life implementation of these concepts. To have your questions about this chapter answered by the author, browse to www.syngress.com/solutions and click on the “Ask the Author” form.
Q:When designing applications, do I need to design them in an ObjectOriented manner?
A:Absolutely not, although when applications are designed in an OO manner, they are typically more scalable and maintainable, and allow for the use of multiple User Interfaces.You are not forced to create applications in an OO manner, but good programming practices typically stress Object Orientation.
Q:Are there any performance issues when using an OO approach versus a more procedural approach?
A:Yes, typically the OO approach adds a bit of overhead to everything you do. For instance, the creation of the custom DataSet in order to view Boards, Threads, and Posts spends extra time that wouldn’t have been lost if you had gone directly to the database instead of accessing the data through objects. The price of scalability and maintainability is a possible performance loss. Luckily, with .NET, execution is very fast after the initial compile, so it’s also very likely that you would never notice the speed loss.
Q: How important is it to use Validation controls?
A:Very important. In ASP 3.0 and 2.0 (heck, even ASP 1.0), all validation had to be done by hand. Empty fields needed to be validated as well as e-mail addresses and URIs.With Validation controls, ASP.NET does all of this for us, allowing us to focus more on the logic and business rules in our application.
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662Chapter 13 • Creating a Message Board with ADO and XML
Q:How can I ban a list of IP addresses in the future?
A:First, you would need to create a table in your database to store the list of IP addresses, and provide a way for an administrator to enter an IP address into it.Then, at every page you want to disallow this list of IP addresses from viewing, compare the IP address of the requesting user and compare it to the list of IP addresses you have banned. If it exists in your list of banned addresses, redirect them to another page or do whatever else you feel is appropriate.
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@ OutputCache directive, usage, 269–277, 279
A
absoluteExpiration, 258 Accept-Language
header values, 274 parameter, 274
Access control, authorization tag (usage), 208–209
Access database, creation, 506–509 Access datatype, 510
Access object, creation. See Data Access times, 267
Account element, 393 Accounts element, 385, 386 Action events, 77
Active Server Pages (ASP). See Classic ASP
applications, 87
ASP.NET applications, contrast, 231 ASP 1.x, development, 5–6
ASP 2.x changes, 6–7
development, 6–7 weaknesses, 7
ASP 3.0 development, 7–9 weaknesses, 8–9
code, 12
control declaration, 483 controversy, 4–5 developers, 78, 130 editing environment, 5 Engine, 62, 76
file execution,Web server usage, 15–27 history, 2–11
Index
model
ASP.NET improvements, comparison, 14–15
need, 9 need, 3–4
original model, changes, 8 origins, 2–5
pages, 86, 161 scripts, 576
skills, obsolescence, 86 timeline, 10–11 upgrading. See Classic ASP version 4, 11
ActiveX controls, 164, 167 ActiveX Data Objects (ADO), 6, 8
ADO-related codes, 86 update, 19
usage. See Message board creation version 2.5, 10
Actual comment, 475 add attribute, 203
add (processing directive), 189 Add stored procedure, 335
add subtag, 190, 192–193, 202, 207 add tag, 616
addBook page, 533 addBook.aspx, creation, 543
addBook.aspx, creation. See addBook page
addCat, 528, 530
Address book application, creation, 314–341
Address.aspx, 314 AdminAddBook, 512 AdminAddCat, 512 AdminAddCustomer, 512 adminCustomer, 518
663
664 Index
AdminDeleteBook, 512
AdminDeleteCat, 512 AdminDeleteCustomer, 512
Administration login (adminLogin.aspx), creation, 535–536
Administrative interface, construction. See Message board creation
Administrator page (adminPage.aspx), creation, 537–543
Administrators, 581. See also Logged-in administrator
adminLogin.aspx, creation. See Administration login
adminPage.aspx, creation. See Administrator Page
AdminUpdateBook, 512
AdminUpdateCat, 512 AdminUpdateCustomer, 512 ADO. See ActiveX Data Objects ADOCatalog, creation, 547–553 ADO.NET, 12
ADO contrast, 53
changes, understanding, 300–310 FAQs, 345–346
introduction, 299, 300 solutions, 343–344 supported connectivity, 305
ADO.NET shopping cart creation, 501
database, setup, 502–518 FAQs, 566 introduction, 502
site
administration, 533–547 construction, 533
solutions, 562–565 AdRotator controls, 62 ADSI, 13
allBooks.addItem Web method, creation, 541
AllCustById, 512
Allow Paging property, 144
allowOverride attribute, 174, 176, 177, 214
AllowPaging, 152 AllowSorting property, 144, 150
AlternatingItemStyle property, 147 AlternatingItemTemplate, 132
Anchor tag. See HyperText Markup Language
Application. See ASP.NET application cache object, 233–234
class, 250 configuration, 179–184
creation. See ASP.NET application design. See Message board creation events
support, 236–237 usage, 236–239
identity configuration, identity tag (usage), 181
locking, 239
log,Trace information (writing), 432
testing/error-checking. See ASP.NET application
tracing, 432–434 variables, 229, 234 Application state, 63
session states, comparison, 246–258 understanding, 232–236
usage, 232–234 Application-level trace, 433 Application-level variable, 547 Application_onstart method, 548
Application-specific configuration section handlers, 212
Application-wide issues, 246
ApplyStyles, 620
AppSettings, 620 appSettings
node, 312
tag, usage, 220. See also Static variables ArgumentException, 586, 587, 599 Ariba, 350, 455
Array class, 44
Array-like addressing, usage, 96 ArrayList, 95, 602
ListControl, binding, 111–113
.ascx file, 163
.asmx
.aspx, contrast, 450–451 file, 445
extension, 450 page, 444
ASP. See Active Server Pages asp:Button, 62, 135 ASPError object, removal, 27 asp:Label, 62, 102
control, 162 ASP.NET
browser capability function, 21 controls, 68
delivery, 18 developers, 46 Engine, 66 FAQs, 32–33
flexibility, utilization, 12–14 framework, 69
improvements, comparison. See Active Server Pages
introduction, 2 object, 47
pages, 51. See also Data-enabled ASP.NET pages
compilation, 18, 37
Index 665
platform basics, review, 11–15 scripts, 15
server controls, display. See Netscape 4.x
server-side processing, 65 solutions, 29–31 techniques, 95
ASP.NET application, 37, 227 contrast. See Active Server Pages copying, 613
creation, 20–26, 229 debugging, 27 deployment, 13 FAQs, 262–263 introduction, 228 solutions, 259–262
testing/error-checking, 235–236 understanding, 228–229
ASP.NET configuration, 173 FAQs, 224–225 introduction, 174 overview, 174–177 solutions, 223–224
ASP.NET debugging, 417 FAQs, 439–440 introduction, 418 solutions, 438–439
ASP.NET Web application, 86 controls, 66
form, structure, 75–76 pages, running, 19–26
asp:RequiredFieldValidator server control, 535
asp:requiredfieldvalidator tag, 536 asp:TextBox, 62
.aspx
contrast. See .asmx
666 Index
extension, 65 file, 77, 314, 478
scripts, inclusion, 69–72 page, 451
ASPX code, 488 ASPX page, 65, 162
asp:XML server control, 553 asp:xml server control, 547 ATG, 7
Attribute name, 355 AttributeCount property, 365 Attributes, 353
Authentication, 204. See also Biometric authentication;Windows authentication
cookie data, encryption/decryption. See Forms
modules, removal, 207 authentication tag, 205, 206
usage. See User authentication
authenticationModules tag, usage. See Security
authorization tag, usage. See Access control
AutoGenerate, usage, 209
AutoGenerateColumn property, 144, 147
Automatic drill-down facilities, 387 AutoNumber, datatype, 508 AutoPostBack
attributes. See Server controls property, 85, 106
B
B2B partners, 361
BackColor, 101
Backend database failure, 208
Back-end databases, 3
Back-end Web programming, 5 bin subdirectory, 78, 81, 106
Binary code, 18. See also Machinespecific binary code
bindDataGrid procedure, 152 routine, 150
Binding, usage. See Data bindListControl sub-procedure, 131 Biometric authentication, 207 BK_Author, 505
BK_Description, 505
BK_ImagePath, 505
BK_ISBN, 505, 506
BKOR_Price, 506 BKOR_Quantity, 506 BK_Price, 505 BK_Title, 505
Board
browsing, 628–638 class, design, 591–612 object, 592, 657
BoardDescription, 569
BoardID, 569, 570, 596 BoardName, 569, 570, 612 /body, 130–161
Body field, 608
Book Shop Web services, overview, 518–520
BookCatalog class, creation, 548–553 bookCatalog method, 553 bookCatalog.catalogItemDetails, 555 Books
addition. See Database deletion, 541–542 details, updating, 542–543
bookSourceUI, 548 Booleans, 38, 40
BorderColor, 101 bordercolor property, 122 BorderStyle, 101 BorderWidth, 101 Borland, 14 Bottom-most nodes, 360 BoundColumn, 147
Breakpoints, setting, 434–435 Broadvision, 7
Browser. See Down-level browsers; Up-level browsers
communication. See Client/browser communication
type, 16
Browser-based state solution, 230
browserCaps tag, usage. See Client capabilities determination
Browser-compliant HTML, 75 Browsing interface, design, 628–638 btnEditPost_Click method, 657 btnRegister_Click subroutine, 623 btnUpdate_Click method, 640 Bug fixes, 300
Built-in applications, 25 Built-in features, 62 BulletList, 123
Business objects, 568 Byte data types, 39
C
C, 3, 447 programmers, 24
C#, 9, 11–13, 26, 247, 450 class file, 78
source file, 79, 81 syntax, 24, 248 usage, 20, 79, 82
Index 667
Web Service, 522
C++, 3, 8, 14, 25, 447. See also Visual C++
ATL
code, 578 COM, 578
bolted-on approach, 11 C# .NET, 306
Cache duration, 280 expiration, 258
method, usage, 282–284 object. See Application optimization, 268–269 values, 234
Cache Insert method, 258
cache.add method, usage, 282, 285–292 Cached configuration, 220 Cache-filling statements, 258
cache.insert method, usage, 282, 285–292
CacheItemPriority setting, 289 CacheItemPriorityDecay setting, 289 CacheItemRemoved option, 290
CacheItemRemovedCallback delegate, usage, 289–292
Cache.Remove method, usage. See /HTML
Caching, 273. See also Data; Fragment caching; Output caching
data, 282 facility, 252
implementation, 293 overview, 266–269 uses, 293–294
Caching methods, optimization, 265 FAQs, 297–298
introduction, 266
668 Index
solutions, 296–297 Calendar controls, 62 Camel-cased attributes, 211 Carriage return, 24
Cascading Style Sheet (CSS), 348 code, 62
file, 617 script, 491 styles, 622
Case sensitivity, 355 Catalog
element, 353 method, creation, 550 node, 360
rendering, 558–559
catalogByCategory method, creation, 550–551
catalogItemDetails method, creation, 550
catalogRange method, creation, 550–551
catalogRangeByCategory method, creation, 551–553
Catalog.xsd, 358 Catch statements, 425 CAT_ID, 504–505, 522 CAT_Name, 505
C-compiled languages, 5 CDalAddress class, 319
CGI. See Common Gateway Interface Change events, 77
Char data type, 40 CheckBoxes, usage, 103–106 CheckBoxList, 108
control, 101, 106 Child node, 360 Child objects, 597 ChildControls, 621 ChildNodes, 373
ChildNodes.Count, 373 ChildPost property, 599, 603, 605 ChildPosts property, 599, 603, 605 ChildThread, 594
Class file, compiling, 78 Class viewer, usage, 436–437 Classes, 464
arrays, 464–465 Classic ASP, 14, 17, 22
pages, 37 projects, 24 upgrading, 26–27
ClassViewer, 437 clear attribute, 203
clear (processing directive), 189 clear subtag, 190, 192–193, 202, 207 Clear (value), 206
click() event, 70
Client capabilities determination, browserCaps tag, usage, 184–186
Client/browser communication (enabling), System.Web namespace (usage), 45–52
supplied functionality, 45–52 Client-server interaction, 16–17 Client-side JavaScript validation, 120 Client-side scripts, 75
Client-side validation, 120, 121 function. See CustomValidator
ClientValidationFuncation property, 121 C-like shorthand, 250
CLR. See Common Language Runtime cmdCompute, 164
cntApplication, 250 COBOL.NET, 13 Code
conversion. See Multiple languages
creation. See eXtensible Markup Language Cart
development activities, 78 listing, 328
Code-Behind, 63, 78 attribute, 82
class file, development, 83 file, 312
Code-behind, 106, 635, 650, 657 classes, 66, 181
in-page coding, contrast, 77–87 onsubmit(), 559
pages, 15, 450, 455, 543 usage
compilation, inclusion, 81–84 compilation, non-inclusion, 79–81
CodeBehind.aspx file, 80 ColdFusion, 7 Collection objects, 111
Colors, manipulation, 491–495
Column mapping, usage. See DataGrid control
COM. See Component Object Model COM+ components, 27
Command object, 325, 328, 332, 335 usage, 337
Command-line tools, 12 CommandSource, 136
Comment, 352. See also Actual comment Common Gateway Interface (CGI), 4
programs, 3
Common Language Runtime (CLR), 11–13, 27, 37, 63
CLR-supported language, 75 Intermediate Language (IL), 447 languages, 300
usage, 45, 75, 313
Index 669
Common Object Request Broker Architecture (CORBA), 443, 448
CompareValidator, 113, 127–128, 535 control, 117–118
Compilation command, 81 errors, 418–420
inclusion/non-inclusion. See Codebehind
options (setting), compilation tag (usage), 187–190
compilation subtags, 189
compilation tag, usage. See Compilation compiler subtag, 188
Compiling. See World Wide Web services
complexType data structures, 357–358 Component Object Model (COM), 6
components, 24, 27 foundations, 9 objects, 8, 231, 576
Comprehensive Perl Archive Network (CPAN), 5
comptePay procedure, 166 configSections tag, 212
Configuration. See Application; ASP.NET configuration; Encryption; HyperText Transfer Protocol; Request; Security; Session state; Sessions; System; World Wide Web
file, 174
anatomy, 211–222 creation, 215–219 overriding, 175 uses, 177–211
hierarchy, 176 inheritance, 176 section handlers, 212