visual basic 6.0 barcode generator Redirects and Implicit Navigation in Java

Encoding QR Code in Java Redirects and Implicit Navigation

Redirects and Implicit Navigation
Creating QR Code ISO/IEC18004 In Java
Using Barcode printer for Java Control to generate, create QR Code image in Java applications.
Decoding QR Code ISO/IEC18004 In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
It is also possible to use redirects when using the implicit navigation feature, by using the h:link and h:button components
Bar Code Creator In Java
Using Barcode creator for Java Control to generate, create barcode image in Java applications.
Scan Bar Code In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
What s the difference between h:commandButton/h:commandLink and h:button/ link The latter two components were introduced in 20 to enable bookmarkable JSF pages, when used in concert with the View Parameters feature explained later in this chapter There are three main differences between h:button/h:link and h:commandButton/h:commandLink First, h:button/h:link causes the browser to issue an HTTP GET request, while h:commandButton/h:commandLink does a form POST This means that any components in the page that have values entered by the user, such as text fields, checkboxes, etc, will not automatically be submitted to the server when using h:button/h:link To cause values to be submitted with h:button/h:link, extra action has to be taken, using the View Parameters feature The second main difference between the two kinds of components is that h:button/ h:link has an outcome attribute to describe where to go next while h:commandButton/ h:commandLink uses an action attribute for this purpose This is because the former does not result in an ActionEvent in the event system, while the latter does Finally, and most important to the complete understanding of this feature, the h:button/h:link components cause the navigation system to be asked to derive the outcome during the rendering of the page, and the answer to this question is encoded in the markup of the page In contrast, the h:commandButton/h:commandLink components cause the navigation system to be asked to derive the outcome on the POSTBACK from the page This is a difference in timing Rendering always happens before POSTBACK Let s illustrate the difference between h:commandButton and h:button, and also the usage of redirects with implicit navigation, with a simple example Consider this simple Facelets page
QR Printer In C#
Using Barcode printer for .NET Control to generate, create QR-Code image in VS .NET applications.
QR Code Printer In .NET
Using Barcode printer for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 10 Transitional//EN" "http://wwww3org/TR/xhtml1/DTD/xhtml1-transitionaldtd"> <html xmlns="http://wwww3org/1999/xhtml" xmlns:h="http://javasuncom/jsf/html" xmlns:f="http://javasuncom/jsf/core"> <h:head> <title>A Simple JavaServer Faces 20 View</title> </h:head> <h:body> <h:form> <p>Enter first name: <h:inputText value="#{modelfirstName}" /></p> <p><h:button value="HTTP GET" outcome="page02" /></p> <p><h:commandButton value="HTTP POST with Redirect"
Generating QR-Code In Visual Studio .NET
Using Barcode creation for VS .NET Control to generate, create Denso QR Bar Code image in .NET applications.
Making Quick Response Code In Visual Basic .NET
Using Barcode creation for Visual Studio .NET Control to generate, create Denso QR Bar Code image in .NET applications.
Comparing h:commandButton and h:button
Print UPC Symbol In Java
Using Barcode generation for Java Control to generate, create UPC Code image in Java applications.
Code 128C Generation In Java
Using Barcode creation for Java Control to generate, create ANSI/AIM Code 128 image in Java applications.
6:
EAN / UCC - 13 Printer In Java
Using Barcode creator for Java Control to generate, create European Article Number 13 image in Java applications.
EAN / UCC - 13 Generator In Java
Using Barcode drawer for Java Control to generate, create USS-128 image in Java applications.
The Navigation Model
Making ISSN In Java
Using Barcode generation for Java Control to generate, create ISSN - 10 image in Java applications.
Generate Code 3 Of 9 In Visual Studio .NET
Using Barcode creation for Reporting Service Control to generate, create Code 39 image in Reporting Service applications.
action="page02 faces-redirect=true" /></p> <p><h:commandButton value="HTTP POST" action="page02" /></p> </h:form> </h:body> </html>
Barcode Maker In C#
Using Barcode maker for VS .NET Control to generate, create barcode image in .NET framework applications.
Barcode Creation In None
Using Barcode creator for Font Control to generate, create barcode image in Font applications.
PARTIII PART PART
Data Matrix Printer In Visual C#
Using Barcode generation for Visual Studio .NET Control to generate, create Data Matrix image in .NET applications.
Bar Code Creator In Objective-C
Using Barcode generation for iPhone Control to generate, create bar code image in iPhone applications.
The first h:commandButton element has action= page02 faces-redirect=true In the Internet standard that defines URLs, the presence of a character indicates the remainder of the URL will be an & or & separated list of name=value pairs that should be submitted to the server along with the request for the URL This is known as a query string JSF borrows the meaning of the character here, and the meaning is exactly the same is in the Internet standard for URLs There are two special query strings parameters recognized by JSF when it parses the outcome on the server side The faces-redirect query string tells the navigation system that this implicit navigation case must be treated as if it were a real <navigation-case> element that included a <redirect/> element The other special query string parameter, includeViewParams, relates to the View Parameters feature and will be explained in context later in the chapter Any additional parameters not recognized by JSF are simply passed through unmodified Let s now see what happens when each button is pressed in turn The rendering of the view with some text entered into the text field is shown here:
Code-128 Maker In .NET Framework
Using Barcode maker for Reporting Service Control to generate, create Code 128 Code Set B image in Reporting Service applications.
GTIN - 13 Scanner In .NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
Looking at the source, you can see that all of the buttons will cause a navigation to page02xhtml, the source code for which is shown here:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 10 Transitional//EN" "http://wwww3org/TR/xhtml1/DTD/xhtml1-transitionaldtd"> <html xmlns="http://wwww3org/1999/xhtml" xmlns:h="http://javasuncom/jsf/html"> <h:head> <title>Page 02</title> </h:head> <h:body> <p>Page 02</p> <p>Value of First name: <#{modelfirstName}></p> <p>The value will be empty if either of the "HTTP POST with Redirect" or the"HTTP GET" buttons were pressed If the "HTTP POST" button was pressed, the value will not be empty</p> </h:body> </html>
Part I:
Copyright © OnBarcode.com . All rights reserved.