How-To Create Dynamic Image From Text

In this article I’ll provide a simple class in order to Create Dynamic Image From Text, which should be pretty useful for email obfuscation for example.

The TextImage Class

public class TextImage
{
   #region Public Properties

   public Color TextColor { get; set; }
   public Color BackColor { get; set; }
   public Font TextFont { get; set; }
   public String Text { get; set; }

   #endregion

   #region Private Properties

   private Brush TextBrushStyle { get; set; }
   private Brush BackBrushStyle { get; set; }

   #endregion

   #region Constructors

   public TextImage(String text)
   {
       Text = text;
       TextColor = Color.Black;
       BackColor = Color.White;
       TextFont = new Font("Arial", 18, FontStyle.Bold);
   }
   public TextImage(String text, Color textColor, Color backColor, Font textFont)
   {
       Text = text;
       TextColor = textColor;
       TextFont = textFont;
       BackColor = backColor;
   }

   #endregion


   #region Public Methods

   public Bitmap Process()
   {
       TextBrushStyle = new SolidBrush(TextColor);
       BackBrushStyle = new SolidBrush(BackColor);

       float f = TextFont.Size * 72 / 96;
       Bitmap tmp = new Bitmap(Text.Length * (int)f, TextFont.Height);
       using (Graphics graphic = Graphics.FromImage(tmp))
       {
           graphic.FillRectangle(BackBrushStyle, 0, 0, tmp.Width, tmp.Height);
           graphic.DrawString(Text, TextFont, TextBrushStyle, new PointF(0, 0));
       }
       return tmp;
   }
   public void WriteTo(Stream stream)
   {
       Bitmap bmp = Process();
       if (bmp == null) return;
       bmp.Save(stream, ImageFormat.Jpeg);
   }
   public void WriteTo(String filename)
   {
       Bitmap bmp = Process();
       if (bmp == null) return;
       bmp.Save(filename, ImageFormat.Jpeg);
   }

#endregion

}

protected void Page_Load(object sender, EventArgs e)
{
   Response.ContentType = "image/jpeg";
   TextImage img = new TextImage("Hello How Are You ??");
   img.BackColor = Color.White;
   img.TextColor = Color.Red;
   img.WriteTo(Response.OutputStream);
}

Source : http://blog.sb2.fr/post/2008/12/23/How-To-Create-Dynamic-Image-From-Text.aspx