图片添加水印功能

来源：互联网发布：windows 7系统激活工具编辑：程序博客网时间：2024/04/28 19:36

简单贴一段代码(有些元素已经被定义过，这里不详细定义):

                    System.Drawing.Image bitmap = System.Drawing.Image.FromFile(picpath);
                    System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
                    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
                    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

                    string path = Server.MapPath("..");
                    System.Drawing.Image imagewater;
                    imagewater = System.Drawing.Image.FromFile(path + "//images//" + Image1.ImageUrl.Substring(Image1.ImageUrl.LastIndexOf("/") + 1));
                     g.DrawImage(imagewater, 0, 0, imagewater.Width, imagewater.Height);
                    g.Dispose();
                    ImageCodecInfo myImageCodecInfo;
                    System.Drawing.Imaging.Encoder myEncoder;
                    EncoderParameter myEncoderParameter;
                    EncoderParameters myEncoderParameters;
                    myImageCodecInfo = ImageCodecInfo.GetImageEncoders()[1];
                    myEncoder = System.Drawing.Imaging.Encoder.Quality;
                    myEncoderParameters = new EncoderParameters(1);
                    myEncoderParameter = new EncoderParameter(myEncoder, Convert.ToInt64(TextBox2.Text.Trim())); // 0-100
                    myEncoderParameters.Param[0] = myEncoderParameter;

                    bitmap.Save(picpath + "1", myImageCodecInfo, myEncoderParameters);
                    bitmap.Dispose();
                    System.IO.File.Delete(picpath);
                    System.IO.File.Move(picpath + "1", picpath);
                    MyMessageBox.Show(this, "水印添加完毕！");

需要引用的命名空间：

using System.IO;
using System.Drawing;
using System.Drawing.Imaging;