book

Programming Visual Basic .NET

by Dave Grundgeiger

December 2001

Beginner

464 pages

13h 51m

English

O'Reilly Media, Inc.

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Organization of This Book
What Is the Microsoft .NET Framework?
hello, worldHello, WindowsHello, Browser
Source Files

Numeric LiteralsString LiteralsCharacter LiteralsDate LiteralsBoolean LiteralsNothingSummary of Literal Formats
Fundamental TypesCustom TypesArraysInitializing arraysDynamically allocating arraysCollectionsType Conversions
The Namespace StatementThe Imports Statement
Variable Initializers
Unary OperatorsArithmetic OperatorsRelational OperatorsString-Concatenation OperatorsBitwise OperatorsLogical OperatorsOperator PrecedenceOperator Overloading
Option StatementsBranching StatementsCallExitGotoIfRaiseEventReturnSelect CaseIteration StatementsDoForFor EachMathematical FunctionsInput/Output
Object Instantiation and NewConstructorsFieldsRead-only fieldsHandling EventsInheritanceMethodsMethod parametersPassing arrays as parametersVariable-length parameter listsMain methodImplementing interface methodsOverriding inherited methodsOverloadingOverloading inherited methodsShadowingPropertiesThe Me and MyClass KeywordsThe MyBase KeywordNested ClassesDestructorsEarly Versus Late Binding
Boxing and Unboxing
Using Events and Delegates Together
Creating Custom AttributesReading Attributes
Common Language Infrastructure (CLI) and Common Language Runtime (CLR)
Namespaces
Global Assembly Cache (GAC)Comparison of Assemblies, Modules, and Namespaces
FinalizeDispose
Configuration File FormatConfiguration Section GroupsThe <appSettings> Section
Creating a FormCreating a Form Using Visual Studio .NETAdding event handlersCreating a Form in CodeAdding event handlers
Parent and Child FormsCreating a Window MenuMerging MenusDetecting MDI Child Window Activation
The Graphics ClassThe Pen ClassThe Brush ClassThe Color StructureSystem colorsAlpha BlendingAntialiasing
Hello, Printer!The PrintPageEventArgs ClassThe OnBeginPrint and OnEndPrint MethodsChoosing a PrinterThe PageSettings ClassThe PrinterSettings ClassPage Setup Dialog BoxPrint PreviewSummary of Printing
Common Controls and ComponentsThe Button ClassThe CheckBox ClassThe ComboBox ClassThe DateTimePicker ClassThe GroupBox ClassThe ImageList ClassThe Label ClassThe LinkLabel ClassThe ListBox ClassThe ListBox.ObjectCollection ClassThe ListView ClassThe MonthCalendar ClassThe Panel ClassThe PictureBox ClassThe RadioButton ClassThe TextBox ClassThe Timer ClassOther Controls and Components
The Anchor PropertyThe Dock PropertyControlling dock orderThe Splitter control
ColorDialogFontDialogOpenFileDialogPageSetupDialogPrintDialogPrintPreviewDialogSaveFileDialog
Adding Menus in the Visual Studio .NET Windows Forms DesignerProgrammatically Creating MenusHandling Menu EventsCloning Menus
Building Controls from Other ControlsBuilding Controls That Draw ThemselvesBuilding Nonrectangular Controls
Creating a Web FormCreating a Form Using Visual Studio .NETAdding event handlersCreating a Form in CodeSetting control properties using attributesAdding event handlers
AutoEventWireup
Web ControlsThe Button controlThe CheckBox controlThe DropDownList controlThe Image controlThe Label controlThe ListBox controlThe RadioButton controlThe Table controlThe TextBox controlOther web controlsHTML ControlsHandling Control EventsProgrammatically Instantiating Controls
More About Validation-Control Tag AttributesUsing Validation-Control PropertiesProviding a Summary View of Validation FailuresPerforming Custom Validation
The Server ObjectThe Application ObjectThe Session ObjectThe Cache ObjectThe Request ObjectThe Response Object
The Session ObjectThe Application ObjectCookies
Session and Application Startup and Shutdownglobal.asax Compiles to a ClassAdding Global Objects
AuthenticationForms authenticationWindows authenticationIntegrated Windows authenticationDigest authenticationBasic authenticationUnderstanding authenticationAuthorizationASP.NET authorizationWindows NTFS authorizationCode-access authorizationAccessing Network ResourcesIUSR_ComputerNameImpersonation
User ControlsServer ControlsCreating a custom server control using Visual Studio .NETCreating a custom server control in codeUsing a custom server control in Visual Studio .NETUsing a custom server control manually
Creating a Web ServiceThe WebService AttributeThe WebMethod AttributeThe WebService Class
Consuming a Web Service in Visual Studio .NETConsuming a Web Service in NotepadSynchronous Versus Asynchronous Calls
A Brief History of Universal Data Access
The DataSet ClassFinding TablesFinding RowsThe Select method versus the SQL SELECT statementFinding Column ValuesFinding Column DefinitionsChanging, Adding, and Deleting RowsWriting Updates Back to the Data Source
.NET Information

Content preview from Programming Visual Basic .NET

Testing a Web Service with a Browser

Web services deployed on ASP.NET can easily be tested with a web browser, because the ASP.NET framework itself includes the ability to generate browser screens based on the definition of the web service. For example, browsing to the .asmx file shown in Example 7-1 (using the URL http://localhost/WebServices/HelloWebService.asmx) produces the browser screen shown in Figure 7-1.

Figure 7-1. Browsing to a web service hosted in ASP.NET

To test a web service in a web browser, the .asmx file must be deployed in an IIS virtual directory. Using the browser to view the .asmx file directly from disk doesn’t work.

The “HelloWebService” in large font in Figure 7-1 is the name of the web service exposed at the given URL. This is the name of the implementation class (or the value given by the Name parameter of the WebService attribute, if present). Underneath the main heading there are two additional links. The first, marked “Service Description”, links to the WSDL description of the service. (Web-service descriptions and WSDL are explained in the next section.)

The second, at the bottom of the test window, is the list of web methods exposed by the web service. In the case of HelloWebService, there is only a single method, SayHello. Clicking on the name of the method brings up a screen with information about that method and with a mechanism for testing it. ...