Reference Guide
GdPicture14.WPF Namespace / GdViewer Class / GetVerticalScrollBarPosition Method
Example





In This Topic
    GetVerticalScrollBarPosition Method
    In This Topic
    Gets the current position of the vertical scrollbar, in pixels, related to the document currently displayed in the GdViewer control. The resulting coordinate corresponds to the actual document area of the currently displayed page.
    Syntax
    'Declaration
     
    
    Public Function GetVerticalScrollBarPosition() As Double
    public double GetVerticalScrollBarPosition()
    public function GetVerticalScrollBarPosition(): Double; 
    public function GetVerticalScrollBarPosition() : double;
    public: double GetVerticalScrollBarPosition(); 
    public:
    double GetVerticalScrollBarPosition(); 

    Return Value

    The current vertical coordinate of the vertical scrollbar, in pixels, related to the displayed document.
    Remarks
    You can regularly apply the GetStat method to determine if this method has been successful.

    Just to remind you, that this coordinate is 0-based with the origin being in the top left corner in the document pages area and it is related to the current page determined by the CurrentPage property.

    Example
    How to get the current position of the scrollbars.
    'We assume that the GdViewer1 control has been properly integrated.
    If GdViewer1.DisplayFromFile("") = GdPictureStatus.OK Then
                
        'The current position of both scrollbars after displaying the document
        'according to your currently defined GdViewer control settings.
        Dim x As Double = GdViewer1.GetHorizontalScrollBarPosition()
        Dim y As Double = GdViewer1.GetVerticalScrollBarPosition()
        MessageBox.Show("The scrollbars are set to this position: " + x + ", " + y, "GdViewer.GetVerticalScrollBarPosition")
                
        If (x <> 0) OrElse (y <> 0) Then
            'Setting the scrollbars to the required position.
            GdViewer1.SetHorizontalScrollBarPosition(0)
            GdViewer1.SetVerticalScrollBarPosition(0)
            MessageBox.Show("The scrollbars are now set to this position: 0, 0", "GdViewer.GetVerticalScrollBarPosition")
        End If
                
        'Do your other stuff here.
        GdViewer1.CloseDocument()
    Else
        MessageBox.Show("This file can't be displayed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.GetVerticalScrollBarPosition")
    End If
    //We assume that the GdViewer1 control has been properly integrated.
    if (GdViewer1.DisplayFromFile("") == GdPictureStatus.OK)
    {
        //The current position of both scrollbars after displaying the document
        //according to your currently defined GdViewer control settings.
        double x = GdViewer1.GetHorizontalScrollBarPosition();
        double y = GdViewer1.GetVerticalScrollBarPosition();
        MessageBox.Show("The scrollbars are set to this position: " + x.ToString() + ", " + y.ToString(), "GdViewer.GetVerticalScrollBarPosition");
                
        if ((x != 0) || (y != 0))
        {
            //Setting the scrollbars to the required position.
            GdViewer1.SetHorizontalScrollBarPosition(0);
            GdViewer1.SetVerticalScrollBarPosition(0);
            MessageBox.Show("The scrollbars are now set to this position: 0, 0", "GdViewer.GetVerticalScrollBarPosition");
        }
                
        //Do your other stuff here.
        GdViewer1.CloseDocument();
    }
    else
        MessageBox.Show("This file can't be displayed. Status: " + GdViewer1.GetStat().ToString(), "GdViewer.GetVerticalScrollBarPosition");
    See Also