PageRequestCallback Delegate

Delegate method that is used to request a page and provide the requested page to the caller method.

Syntax

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public delegate void PageRequestCallback( 
   PageRequestCallbackData data
)

'Declaration
 
Public Delegate Sub PageRequestCallback( _
   ByVal data As PageRequestCallbackData _
)

'Usage
 
Dim instance As New PageRequestCallback(AddressOf HandlerMethod)

public delegate void PageRequestCallback( 
   PageRequestCallbackData data
)

PageRequestCallback( 
   data 
)

public delegate void PageRequestCallback( 
   PageRequestCallbackData^ data
)

Parameters

data: An instance of the PageRequestCallbackData interface containing the requested image information.

Remarks

This delegate is useful when the number of form pages is not known before recognizing the form or when the users does not want to load all image pages in the memory or load them via network while he needs to process few of them. So the user loads the first page of the form and uses it for recognition, then for processing he will be asked to provide only the pages that have processing fields.

Example

For an example, refer to AutoFormsEngine.Run(RasterImage form, PageRequestCallback pageRequestCallback, Object userData, List<IMasterFormsCategory>).

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

PageRequestCallback Members
Leadtools.Forms.Auto Namespace