ScrollBar Value changed event handler : ScrollBar : GUI Windows Forms C# Examples

    
using  System;
using  System.Drawing;
using  System.Windows.Forms;

public  class  ScrollBarsControlPictureBox  :  Form
{
    Panel  pnl;
    PictureBox  pb;
    HScrollBar  hbar;
    VScrollBar  vbar;
    Image  img;

    public  ScrollBarsControlPictureBox()
    {
        Size  =  new  Size(480,300);

        img  =  Image.FromFile("YourFile.gif");

        pnl  =  new  Panel();
        pnl.Parent  =  this;
        pnl.Size  =  new  Size(400,200);
        pnl.Location  =  new  Point(10,10);
        pnl.BorderStyle  =  BorderStyle.FixedSingle;

        pb  =  new  PictureBox();
        pb.Parent  =  pnl;
        pb.Size  =  new  Size(img.Size.Width,  img.Size.Height);
        pb.Location  =  new  Point((pnl.Size.Width  /  2)  -  (pb.Size.Width  /  2),
                                (pnl.Size.Height  /  2)  -  (pb.Size.Height  /  2));
        pb.SizeMode  =  PictureBoxSizeMode.CenterImage;
        pb.Image  =  img;

        hbar  =  new  HScrollBar();
        hbar.Parent  =  this;
        hbar.Location  =  new  Point(pnl.Left,  pnl.Bottom  +  25);
        hbar.Size  =  new  Size(pnl.Width,  25);
        hbar.Minimum  =  0;
        hbar.Maximum  =  100;
        hbar.SmallChange  =  1;
        hbar.LargeChange  =  10;
        hbar.Value  =  (hbar.Maximum  -  hbar.Minimum)  /  2;
        hbar.ValueChanged  +=  new  EventHandler(hbar_OnValueChanged);

        vbar  =  new  VScrollBar();
        vbar.Parent  =  this;
        vbar.Location  =  new  Point(pnl.Right  +  25,  pnl.Top);
        vbar.Size  =  new  Size(25,  pnl.Height);
        vbar.Minimum  =  0;
        vbar.Maximum  =  100;
        vbar.SmallChange  =  1;
        vbar.LargeChange  =  10;
        vbar.Value  =  (vbar.Maximum  -  vbar.Minimum)  /  2;
        vbar.ValueChanged  +=  new  EventHandler(vbar_OnValueChanged);

    }

    private  void  hbar_OnValueChanged(object  sender,  EventArgs  e)
    {
        pb.Location  =  new  Point((pnl.Size.Width  -  img.Size.Width)  *  (hbar.Value)  /  (hbar.Maximum  -  hbar.LargeChange  +  1),  pb.Top);
    }

    private  void  vbar_OnValueChanged(object  sender,  EventArgs  e)
    {
        pb.Location  =  new  Point(pb.Left,  (pnl.Size.Height  -  img.Size.Height)  *  vbar.Value  /  (vbar.Maximum  -  vbar.LargeChange  +  1));
    }

    static  void  Main()  
    {
        Application.Run(new  ScrollBarsControlPictureBox());
    }
}