PreRun Method

public bool PreRun( 
   DocumentViewer documentViewer,
   object value
)

'Declaration
 

Public Function PreRun( _
   ByVal documentViewer As DocumentViewer, _
   ByVal value As Object _
) As Boolean

'Usage
 

Dim instance As DocumentViewerCommand
Dim documentViewer As DocumentViewer
Dim value As Object
Dim value As Boolean
 
value = instance.PreRun(documentViewer, value)

public:
bool PreRun( 
   DocumentViewer^ documentViewer,
   Object^ value
) 

Parameters

documentViewer

Owner document viewer.

value

The value to be used with the command.

Return Value

This method informs the document viewer that this command is about to run by creating a new DocumentViewerOperationEventArgs object with DocumentViewerOperation.RunCommand and the command object in Data1, value in Data2 and IsPostOperation set to false then firing the Operation event.

This informs anyone listening to the event the command is about to run which can be important if the command is slow. For example, to create a wait dialog in the user interface in this case.

The listener can also abort the execution of this command by setting the value of Abort to true. Which will result in this method returning false to the document viewer and the running of this command is canceled.

Target Platforms

Reference

DocumentViewerCommand Class
DocumentViewerCommand Members