using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Web;
using System.IO;
// Draw the image in the bottom-right corner 图片右下角
using (System.Drawing.Image watermark = System.Drawing.Image.FromFile(HttpContext.Current.Server.MapPath("~/Gfx/Watermark.png")))
{
using (Graphics g = Graphics.FromImage(args.Image))
{
// Setup the quality settings (max)
g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;

// Draw the image
g.DrawImageUnscaled(watermark, args.Image.Width - watermark.Width, args.Image.Height - watermark.Height, watermark.Width, watermark.Height);

g.Dispose();
}
}




​​图片水印与文字水印_图片水印与文字水印​​

// Draw the text in the bottom-right corner
using (Graphics g = Graphics.FromImage(args.Image))
{
string text = "MyLogo";
Font font = new Font(FontFamily.GenericSansSerif, 14, FontStyle.Bold);
SizeF stringSize = g.MeasureString(text, font);
PointF location = new PointF(args.Image.Width - stringSize.Width - 10, args.Image.Height - stringSize.Height - 10);

// Setup the quality settings
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

// Draw the text
g.DrawString(text, font, Brushes.Red, location);

g.Dispose();
}




水印在图片中心 这个图只截取了一部分

​​图片水印与文字水印_2d_02​​

using (Graphics g = Graphics.FromImage(args.Image))
{
// Draw a horizontal text in the image center
string text = "My NEW watermark";
Font font = new Font(FontFamily.GenericSansSerif, 24, FontStyle.Bold);
SizeF stringSize = g.MeasureString(text, font);
PointF location = new PointF((args.Image.Width - stringSize.Width) / 2, (args.Image.Height - stringSize.Height) / 2);

// Setup the quality settings
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;

// Draw the text
g.DrawString(text, font, new SolidBrush(Color.FromArgb(85, 255, 255, 80)), location);

// Draw a vertical text in the bottom-right corner
DateTime dt = DateTime.UtcNow;
text = "My watermark - " + dt.ToString("s");
font = new Font(FontFamily.GenericSansSerif, 9, FontStyle.Bold);
StringFormat stringFormat = new StringFormat();
stringFormat.FormatFlags = StringFormatFlags.DirectionVertical;
stringSize = g.MeasureString(text, font, 100, stringFormat);
location = new PointF(args.Image.Width - stringSize.Width - 5, args.Image.Height - stringSize.Height - 5);

// Draw another text
g.DrawString(text, font, new SolidBrush(Color.FromArgb(80, 255, 255, 255)), location, stringFormat);

g.Dispose();
}