draw vertical lines on image using c#

Question

Hi!
i have a widows form in c#. what i want is to create an app that draw vertical line on a bitmap image. for that i wrote the following code:
   private void Form1_Load(object sender, EventArgs e)
            {
                  Bitmap bmOriginal = new Bitmap("kpk.bmp");
                  Rectangle cloneRect = new Rectangle(0,0 , 200, 200);
                  System.Drawing.Imaging.PixelFormat format =
                     bmOriginal.PixelFormat;

                  Bitmap bmTile1 = bmOriginal.Clone(cloneRect, format);
                  pictureBox1.Image = bmTile1;

                  }
but when i run the app is does not show the lines on image.i tried to change the values in ractangle but it didnt effect. can somebody tells me what wrong and what i need to do.?or any other C# source for that....?
thanks in advance

Frogleg · Answer

Try this using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace LineOnImage { public partial class Form1 : Form { Bitmap bmOriginal; public Form1() { InitializeComponent(); } private void Form1_Load(object sender EventArgs e) { drawImage(); } public void drawImage() { Image img = Image.FromFile(kpk.bmp); bmOriginal = new Bitmap(img.Widthimg.Height); Graphics g = Graphics.FromImage(bmOriginal); g.DrawImage(img 0 0); pictureBox1.Image = bmOriginal; img.Dispose(); } private void pictureBox1_Paint(object sender PaintEventArgs e) { int w = pictureBox1.Width / 2; int h = pictureBox1.Height ; e.Graphics.DrawLine(Pens.Red w 0 w h);// this will draw a line on picturebox only - not bmOriginal } } } To draw on bmOriginal you need to create graphics as above Graphics g = Graphics.FromImage(bmOriginal); g.DrawLine(As above); and if you want to you can save the bitmap bmOriginal.Save(whatever.bmp System.Drawing.Imaging.ImageFormat.Bmp);