add Watermark Text - CSharp System.Drawing

Description

add Watermark Text
Demo Code


using System.Web;
using System.Runtime.InteropServices;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Drawing;
using System;//from  w  w w .  j av a2 s .  c  o  m

public class Main{
        public static bool addWatermarkText(string oldpath, string newpath, string _watermarkText, string _watermarkPosition = "WM_CENTER", string fontStyle = "arial", int fontSize = 14, string color = "#FFFFFF")
        {
            try
            {
                StringFormat format;
                Image image = Image.FromFile(HttpContext.Current.Server.MapPath(oldpath));
                Bitmap bitmap = new Bitmap(image.Width, image.Height, PixelFormat.Format24bppRgb);
                Graphics graphics = Graphics.FromImage(bitmap);
                graphics.Clear(Color.White);
                graphics.SmoothingMode = SmoothingMode.HighQuality;
                graphics.InterpolationMode = InterpolationMode.High;
                graphics.DrawImage(image, 0, 0, image.Width, image.Height);
                Font font = null;
                SizeF ef = new SizeF();
                font = new Font(fontStyle, (float) fontSize);
                ef = graphics.MeasureString(_watermarkText, font);
                float x = 0f;
                float y = 0f;
                string str = _watermarkPosition;
                if (str != null)
                {
                    if (!(str == "WM_TOP_LEFT"))
                    {
                        if (str == "WM_TOP_RIGHT")
                        {
                            goto Label_0104;
                        }
                        if (str == "WM_BOTTOM_RIGHT")
                        {
                            goto Label_012D;
                        }
                        if (str == "WM_BOTTOM_LEFT")
                        {
                            goto Label_0163;
                        }
                        if (str == "WM_CENTER")
                        {
                            goto Label_018B;
                        }
                    }
                    else
                    {
                        x = ef.Width / 2f;
                        y = 8f;
                    }
                }
                goto Label_01B7;
            Label_0104:
                x = (image.Width * 1f) - (ef.Width / 2f);
                y = 8f;
                goto Label_01B7;
            Label_012D:
                x = (image.Width * 1f) - (ef.Width / 2f);
                y = (image.Height * 1f) - ef.Height;
                goto Label_01B7;
            Label_0163:
                x = ef.Width / 2f;
                y = (image.Height * 1f) - ef.Height;
                goto Label_01B7;
            Label_018B:
                x = image.Width * 0.5f;
                y = (image.Height * 0.5f) - (ef.Height / 2f);
            Label_01B7:
                format = new StringFormat();
                format.Alignment = StringAlignment.Center;
                SolidBrush brush = new SolidBrush(Color.FromArgb(0x99, 0, 0, 0));
                graphics.DrawString(_watermarkText, font, brush, x + 1f, y + 1f, format);
                SolidBrush brush2 = new SolidBrush(Color.FromArgb(0x99, ColorTranslator.FromHtml(color)));
                graphics.DrawString(_watermarkText, font, brush2, x, y, format);
                brush.Dispose();
                brush2.Dispose();
                bitmap.Save(HttpContext.Current.Server.MapPath(newpath));
                bitmap.Dispose();
                image.Dispose();
                return true;
            }
            catch
            {
            }
            return false;
        }
}
add Watermark Text - CSharp System.Drawing

Description

Demo Code

Related Tutorials
