HasJavaScript Method (GdPicturePDF)

In This Topic

Returns if the currently loaded PDF document contains any executable JavaScript actions.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Function HasJavaScript() As Boolean

public bool HasJavaScript()

public function HasJavaScript(): Boolean;

public function HasJavaScript() : boolean;

public: bool HasJavaScript();

public:
bool HasJavaScript();

Return Value

true if the currently loaded PDF document contains any JavaScript actions, otherwise false. The GdPicturePDF.GetStat method can be subsequently used to determine if this method has been successful.

Remarks

This method is only allowed for use with non-encrypted documents.

It is recommend to use the GdPicturePDF.GetStat method to identify the specific reason for the method's failure, if any.

Example

How to find out if the PDF document contains JavaScript actions.

VB.NET
C#

Dim caption As String = "Example: HasJavaScript"
Dim gdpicturePDF As GdPicturePDF = New GdPicturePDF()
If gdpicturePDF.LoadFromFile("sample.pdf", False) = GdPictureStatus.OK Then
    Dim hasJS As Boolean = gdpicturePDF.HasJavaScript()
    If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
        If hasJS Then
            MessageBox.Show("This PDF document contains JavaScript.", caption)
        Else
            MessageBox.Show("This PDF document contains NO JavaScript.", caption)
        End If
    Else
        MessageBox.Show("The HasJavaScript() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)
    End If
Else
    MessageBox.Show("The file can't be loaded. Status: " + gdpicturePDF.GetStat().ToString(), caption)
End If
gdpicturePDF.Dispose()

string caption = "Example: HasJavaScript";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
if (gdpicturePDF.LoadFromFile("sample.pdf", false) == GdPictureStatus.OK)
{
    bool hasJS = gdpicturePDF.HasJavaScript();
    if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
    {
        if (hasJS)
            MessageBox.Show("This PDF document contains JavaScript.", caption);
        else
            MessageBox.Show("This PDF document contains NO JavaScript.", caption);
    }
    else
        MessageBox.Show("The HasJavaScript() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);
}
else
    MessageBox.Show("The file can't be loaded. Status: " + gdpicturePDF.GetStat().ToString(), caption);
gdpicturePDF.Dispose();

Reference

GdPicturePDF Class
GdPicturePDF Members
RemoveJavaScript Method