PageDisplay (Function)

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Web-specific functions

Page management functions

Prefix syntax

PageDisplay

Presentation

Example

Retrieving parameters in the event "Global declarations"

Retrieving the parameters with PageParameter

Principle for opening a page

Operations run when the page is displayed

Special cases

Opening a page of a component

Pre-launched sessions

See also

PageDisplay (Function)

In french: PageAffiche

Displays a web page in the user's browser.

The page displayed can be a static WEBDEV page, a page in session mode or an Active WEBDEV Page.

The page displayed can be a static WEBDEV page or an Active WEBDEV Page. To display an Active WEBDEV Page while passing parameters, use FileDisplay.

The page displayed is another PHP page of the project.

Remarks:

If PageDisplay is used in the code of a Button control, the page will be opened in the target defined for this Button control ("General" tab of the control description or ChangeTarget).
To display any page in a browser, use one of the following functions: BrowserRunApp or BrowserOpen.

Example

// Display a page according to the authorization
IF bAuthorize(Name) THEN
PageDisplay(PAGE_Welcome, Name)
ELSE
PageDisplay(PAGE_Error, "Access denied")
END

// In "PAGE_MyPage.AWP", displays the 150th element
// of "Instruments" category
PageDisplay(PAGE_MyPage, "Instruments", 150)

// Displays a static page in the current frame
PageDisplay(PAGE_STATICPAGE)

// Displays any page in the current frame
IF Nation() = nationEnglish THEN
PageDisplay("US/PAGE_Example.HTM")
ELSE
PageDisplay("FR/PAGE_Example.HTM")
END

// Displays a static page in a new resizable browser
// (500x400). This browser will be closed if the calling browser is closed.
sPageName is string = "STATICPAGE"
PageDisplay(sPageName, NewBrowser, ...
"NEWBRW", ONResizable + ONScrollBar, 500, 400, 10, 20, "dependent=1")

Syntax

PageDisplay(<Page> [, <Parameter 1> [... [, <Parameter N>]]])

<Page>: Page name

Name of page to display.
If this parameter is equal to an empty string (""), the name of the page corresponds to the page to which the current process belongs.
In test mode, specify the full path of the page if the page to open is located in a directory other than the project directory.

<Parameter 1>: Type of value sent to the page (optional)

Parameters expected by the opening process of the page to display. These parameters are passed by reference and are considered as global variables to the page. For an AWP or PHP page, these parameters are converted into string.

<Parameter N>: Type of value sent to the page (optional)

Parameters expected by the opening process of the page to display. These parameters are passed by reference and are considered as global variables to the page. For an AWP or PHP page, these parameters are converted into string.
In the environment, when defining the action of a button or link, you have the ability to select the page to display to avoid programming PageDisplay in the click code. You also have the ability to define the parameters passed to the page by clicking the "Parameters" button.
The parameters can also be defined as:
Fixed value,
Reference to a page control,
Reference to a variable.

PageDisplay(<Page> [, <Target> [, <Browser window> [, <Options> [, <Width> [, <Height> [, <Horizontal position> [, <Vertical position> [, <JavaScript parameters>]]]]]]]])

<Page>: Name of the page or character string

Name of page to display:
Static page of the project or Active WEBDEV Page:
The name of the page is specified without extension. The page is displayed according to the project language parameters.
Example: The following syntax is sued to display the static page named "CompanyPage":
PageDisplay(CompanyPage)
Any HTML page found in the <Project name>_WEB directory (or in one of its subdirectories):
The name of the page to display must correspond to the full path of the page starting from the <Project name>_WEB directory and it must include the extension of the file. In this case, the multilingual feature must be managed.
Example: To display "C:\My Projects\MySite\MySite_WEB\Misc\HTMLPage.htm", use the following syntax:
PageDisplay("Misc\HTMLPage.htm")

<Target>: Optional character string or constant

Name of the target frame or alias of the target iFrame control.
<Target> can also take the following values:
CurrentBrowser the target is the current browser.
This parameter can also correspond to the "_top" string (compatibility with WEBDEV 1.5).
CurrentFrame the target is the current frame (default value).
This parameter can also correspond to the "_self" string (compatibility with WEBDEV 1.5).
NewBrowser the target is a new browser (a new browser window is opened). The following parameters of PageDisplay are used to configure this new window.
This parameter can also correspond to the "_blank" string (compatibility with WEBDEV 1.5).
ParentFrame the target is the container of the current page (parent frameset, parent browser).
This parameter can also correspond to the "_parent" string (compatibility with WEBDEV 1.5).

<Browser window>: Optional character string

Window name in the new browser if <Target> is set to the NewBrowser constant. This parameter allows you to redisplay a page in a browser with the same name (if several browsers are opened on the computer of Web user).

<Options>: Optional Integer constant (or combination of constants)

Parameters of the window in the new browser if <Target> is equal to the NewBrowser constant:
ONFull
(Default value) The window of new browser will include all options (equivalent to the combination of all constants)
ONLink The link bar will be displayed
ONLocation The address bar will be displayed
ONMenuBar The menu bar will be displayed
ONResizable The window of new browser will be resizable
ONSatusBar The status bar will be displayed
ONScrollbar The scrollbars will be displayed
ONSimple The window of the new browser will be a simple window (no combination of constants).
ONToolbar The toolbar will be displayed

<Width>: Optional integer

Width of window in the new browser (in pixels).

<Height>: Optional integer

Height of window in the new browser (in pixels).

<Horizontal position>: Optional integer

Horizontal position (in pixels) of the window in the new browser (in relation to the upper-left corner of the screen).

<Vertical position>: Optional integer

Vertical position (in pixels) of the window in the new browser (in relation to the upper-left corner of the screen).

<JavaScript parameters>: Optional character string

Other JavaScript parameters that must be used when opening a new browser if <Target> is equal to the NewBrowser constant.

Remarks

Retrieving parameters in the event "Global declarations"

To retrieve parameters in the "Global declarations" event of the page, specify the following line at the beginning of the code:

PROCEDURE <Page name> (<Parameter 1> [, ...[, <Parameter N>]]])

These parameters can be strings, reals or integers. The parameters retrieved in the "Global declarations" event of the page are character strings (AWP and PHP pages only)

Retrieving the parameters with PageParameter

PageParameter is used to retrieve the value of the parameters passed to the page. Several possibilities exist according to the type of page:

Retrieval according to the name of the parameter
The name of the parameter was specified in the URL of the page.
For an AWP or PHP page, the parameters are automatically renamed by WEBDEV (P1, P2, ..., P256). In this case, no controls named P1, P2, ..., P256 must be found in the page.
1. Code used to display the page by passing parameters:
  
  // In the "MyPage.AWP" page, displays the 350th element
  // of "Instruments" category
  PageDisplay(PAGE_MyPage, "Instruments", 350)
2. Code used to retrieve the parameters:
  
  // Retrieve the parameters
  SoughtCategory is string = PageParameter("P1")
  SoughtID is int = PageParameter("P2")
Retrieval according to the subscript of the parameter
The subscript of the parameter corresponds to the order in which the parameters were passed in the URL of the page.
1. Code used to display the page by passing parameters:
  
  // In the "PAGE_MyPage.AWP" page, displays the 350th element
  // of "Instruments" category
  PageDisplay(PAGE_MyPage, "Instruments", 350)
2. Code used to retrieve the parameters:
  
  // Retrieve the parameters
  SoughtCategory is string = PageParameter(1)
  // SoughtCategory = "P1=Instruments"
  SoughtCategory = Right(Length(SoughtCategory)-3)
  SoughtID is int = PageParameter(2)
  // SoughtID = "P2=350"
  SoughtID = Right(Length(SoughtID)-3)

Principle for opening a page

PageDisplay does the following:

Create a page context on the server (except when displaying PHP pages).
Return the page to the browser of web user.

PageDisplay returns only the page in the user's browser.

Operations run when the page is displayed

The following operations are run when the page is displayed:

Running the "Global declarations" event of control templates and internal pages.
Running the "Global declarations" event of the page.
Intialization on the direct child controls of the page (and recursively on the page controls and objects):
- Declaration code of variables (if it exists and if it was not run yet: page, supercontrol, popup, ...).
- Intialization of direct children.
- Request for refreshing the display code (if it exists).
- Initialization code (if it exists).
For all page controls (according to a browse in depth):
- Filling the control (for the List box, Combo box, Table or browsing Looper controls)
- End of initialization code (if it exists).
Running the event "Request for refreshing the display" of the page (if it exists).
Running the "Initializing" event of the page.

Furthermore, for a page that inherits from a template, the code of template(s) is run just before the page code. For the controls that inherit from a template, ExecuteAncestor must be used to call the template code (except for the declaration code).

Special cases

To redisplay a page, it is recommended to use PageRefresh.
To take a change of language into account (Nation), use PageUse.
If a page context with the same name already exists, it is deleted (and its closing code is run) before the new one is opened.
To display any page (not necessarily found in the site), use BrowserOpen for example.

Opening a page of a component

To open a page of a component, use the name of the component page (the component being included in the project). For example:

PageDisplay(ComponentPage)

If a conflict occurs with a project element, the name of the element must be prefixed by the name of the component. For example:

PageDisplay(MyComponent.MyPage)

To use the name of the page in a variable, specify the name of the component. For example:

sPage is string = "MyComponent.MyPage"
PageDisplay(sPage)

Pre-launched sessions

If your project uses pre-launched sessions, this function must not be used in the project initialization event. This function must be used in the "Initializing the project after connection to the site" event.

Business / UI classification: UI Code

Component: wd280page.dll