★★创造未来★★

its formal parameters, considered in the order left to right. The signature of a methodspecifically does not include the return type, nor does it include the params modifier that may bespecified for t

Data TypesVisual Basic .NET provides a broad range of data types that you can use when defining variables and working with data. These data types are slightly different from those provided by VB6 or V

Event-Handling BasicsThe process of creating a Web Forms user interface involves placing controls onto a page and then writing code to react to events that occur as users interact with those controls.

Chapter 7. Working with ASP.NET and VB .NETOBJECTIVESLearn event-handling basicsLearn Visual Basic .NET data typesLearn to create procedures and classesUse the StringBuilder classWhen you start coding

Creating the Northwind SolutionTo demonstrate working with Web Forms and server controls, in this section youll add a main page to the Northwind Trading Company application that includes links to pag

Creating User ControlsIn addition to the built-in server controls in the .NET Framework, you can also build your own controls to be placed on Web Forms. ASP.NET supports two different types of user-cr

Internet Information Server (IIS) ObjectsIIS supplies many objects that can be used by hosting platforms such as ASP and ASP.NET. These objects arent new in ASP.NET梩heyre the same objects (with a fe

How Web Forms WorkJust as youll find when working with Windows Forms, ASP.NET Web Forms raise events in a certain order as the page initializes and loads. ASP.NET also raises events in response to us

Introducing Web Form ControlsAs mentioned earlier, ASP.NET provides two sets of controls you can choose from when developing Web Forms. We suggest you spend most of your time using the standard Web Fo

Overview of ASP.NETASP.NET consists of several different technologies, including Web Forms, Web Services, server controls, HTML controls, and validation controls, as shown in Figure 6.1. All these tec

Chapter 6. Introduction to ASP.NETOBJECTIVESLearn about Web Forms, the basis of ASP.NET applicationsLearn the various types of server controls and determine when to use eachBuild a sample Web Form wit

Web Sites Created Using ASP.NETASP seemed great a few years ago, but now ASP.NET provides a simpler, faster, more powerful way to create Web applications. Instead of using a scripting language, you ma

Creating Web Sites Before ASP.NETBefore ASP.NET, developers using Microsoft products had two paths they could take: Developers could either create simple HTML pages or they could use Active Server Pag

HTML BasicsUnder the covers, the Web uses the Hypertext Markup Language (HTML) to send information to Web browsers. This common markup language can be used by any browser, on any computer. When you re

Creating Your Own ProceduresAs you write Visual Basic .NET applications, youll want to break your code up into manageable "chunks." This shouldnt be a new concept to you, and it should make sense. T

Chapter 8. Validation ControlsOBJECTIVESInvestigate the validation controls provided by ASP.NETCreate Web forms that validate dataBefore ASP.NET, validating the data users entered onto a Web page eith

Requiring Data EntryYoull often need to ensure that users enter a value into a control on a page. To make this easy, ASP.NET provides its RequiredFieldValidator control. On the sample page, EmpMaint.

.,,,::::t:MMMMMMMMMBVt:+.. 　　 ,IVXVYIBttt+::+IVVMMMMMMRR:　　 ,YYVYItMYti+i++:X+Rt:tXWRMR, 　　 .YRiIYRMViitVXRWRYMI++++itMM.. 　　　.Y+,.,X::,,,YMMMMMMMMRVItXMti 　　　 :X+:,X:,. .,iiIRMWMMMBBRMMBY. 　　　　tR+:I:

SummaryThis chapter presented you with the different features of the integrated debugging environment in Visual Studio .NET. These powerful tools help you track down bugs easily. In this chapter, you

Conditional CompilationAlthough debugging techniques can help you iron out problems in your code, you may want to simply add chunks of code at compile time (if youre currently in the debugging phase

Using the Debug ClassDuring the testing of your application, you may find that when you are stepping through code the application works fine, but when you run the program straight through it does not

Useful Versus .NET Debugging ToolsBreakpoints are great, but theyre not enough. You need to be able to view and modify data, find out how the execution path got you to the current location, and what

Introducing the Debugging ToolsVisual Studio .NET provides many tools you can use to debug your applications. In addition, Visual Basic .NET provides tools you can use, such as the Stop statement, the

Using the DebuggerVisual Studio .NET provides a useful toolbar you can use while debugging but doesnt display it by default. In this section, youll see both how to load the Debug toolbar and how to

Chapter 9. Debugging in Visual Studio .NETOBJECTIVESLearn the three modes of Visual BasicLearn to invoke the debuggerLearn to watch variables and set breakpointsLearn to control and view the execution

Comparing ValuesIts sometimes useful to be able to validate one controls data by comparing it to the data in another control or to a specified value. The CompareValidator control allows you to do bo

Summarizing Validation Messages As you may have noticed, all the validation messages take up a lot of space on the page梱ou may not want to sacrifice all that space for your validation messages. ASP.NE

Creating Your Own ValidationThere may be times when you cant find one of the built-in validation controls that handles your specific data. For example, which control could verify that a number the us

Validating ExpressionsWhat if you need to verify that text someone has entered is a correctly formatted Canadian postal code? What if you need a user to enter a valid e-mail address? Although you coul

Checking a RangeThe RangeValidator control allows you to verify that the value of a control falls within a specified range. For example, you could make sure that a text boxs value is between 5 and 10

Internet BasicsAll computers on the Internet are uniquely identified by an IP address. Just like a phone number uniquely identifies a particular phone, an IP address uniquely identifies a specific ser

Chapter 5. Introduction to Internet ProgrammingOBJECTIVESReview Internet basicsLearn the difference between HTML and ASPUnderstand what makes ASP.NET better than ASPThe Internet is a

The System.Xml NamespaceYoull use the System.Xml namespace for processing XML data. This namespace supports an ever-expanding host of XML standards, such as the following:XML 1.0NamespacesSchemasXSL/

This book is designed for anyone who wants to learn how to create a business application using ASP.NET, HTML, and Internet Information Services (IIS). Throughout this book, you will be introduced to t

The purpose of this book is to show you how to use ASP.NET and Visual Studio .NET to build real-world business applications on the Web. We will show the practical applications of ASP.NET by illustrati

The major benefit you will derive from reading this book is that you will be led, step by step, through the creation of a real-world杝tyle business Web application that takes advantage of many of the n

ASP.NET Developers JumpStart By Paul D. Sheriff, Ken Getz    Publisher : Addison Wesley Pub Date : April 08, 2002 The purpose of ASP.NET JumpStart is to show readers the practical applications of .NE

Benefits of Using the .NET Framework.NET provides advantages for everyone involved with the application-development process. The discussion in this section takes into account the people who will be di

Migrating to .NET.NET takes advantage of the best of all the technologies you have used to date, and it improves upon them. If you have an existing application in Visual Basic 6.0, you can attempt to

Types of Applications You Can BuildWith the .NET Framework, you can build many different types of applications, including the following:Windows applicationsWindows ServicesASP.NET Web applicationsASP.