加图片水印

调用代码：

 try 2             { 3                 if (!string.IsNullOrEmpty(DirFile)) 4                 { 5                     List<string> dirs = ImageFile(DirFile); 6                     foreach (var item in dirs) 7                     { 8                         ImageWatermark(item, water, comboBox1.SelectedItem.ToString()); 9                       10                     }11                     MessageBox.Show("批量设置完成！");12                 }13 14                 if (!string.IsNullOrEmpty(ItemFile))15                 {16                     ImageWatermark(ItemFile, water, comboBox1.SelectedItem.ToString());17                     MessageBox.Show("单个设置完成！");18                 }19             }20             catch (Exception ex)21             {22                 MessageBox.Show(ex.Message);23             }

实现代码：

#region 图片水印  2         /// <summary>  3         /// 图片水印处理方法  4         /// </summary>  5         /// <param name="path">需要加载水印的图片路径（绝对路径）</param>  6         /// <param name="waterpath">水印图片（绝对路径）</param>  7         /// <param name="location">水印位置（传送正确的代码）</param>  8         public static string ImageWatermark(string path, string waterpath, string location)  9         { 10             string kz_name = Path.GetExtension(path); 11             if (kz_name == ".jpg" || kz_name == ".bmp" || kz_name == ".jpeg") 12             { 13                 DateTime time = DateTime.Now; 14                 string filename = "" + time.Year.ToString() + time.Month.ToString() + time.Day.ToString() + time.Hour.ToString() + time.Minute.ToString() + time.Second.ToString() + time.Millisecond.ToString(); 15                 Image img = Bitmap.FromFile(path); 16                 Image waterimg = Image.FromFile(waterpath); 17                 Graphics g = Graphics.FromImage(img); 18                 ArrayList loca = GetLocation(location, img, waterimg); 19                 g.DrawImage(waterimg, new Rectangle(int.Parse(loca[0].ToString()), int.Parse(loca[1].ToString()), waterimg.Width, waterimg.Height)); 20                 waterimg.Dispose(); 21                 g.Dispose(); 22                 string newpath; 23                 bool isEquall = false; 24                 if (savePath == Path.GetDirectoryName(path)) 25                 { 26                     newpath = Path.GetDirectoryName(path) + filename + kz_name; 27                     isEquall = true; 28                 } 29                 else 30                 { 31                     newpath = savePath + "\\" + Path.GetFileName(path); 32                 } 33                 img.Save(newpath); 34                 img.Dispose(); 35                 if (isEquall) 36                 { 37                     File.Copy(newpath, path, true); 38                     if (File.Exists(newpath)) 39                     { 40                         File.Delete(newpath); 41                     } 42                 } 43             } 44             return path; 45         } 46  47         /// <summary> 48         /// 图片水印位置处理方法 49         /// </summary> 50         /// <param name="location">水印位置</param> 51         /// <param name="img">需要添加水印的图片</param> 52         /// <param name="waterimg">水印图片</param> 53         private static ArrayList GetLocation(string location, Image img, Image waterimg) 54         { 55             ArrayList loca = new ArrayList(); 56             int x = 0; 57             int y = 0; 58  59             if (location == "左上") 60             { 61                 x = 10; 62                 y = 10; 63             } 64             else if (location == "顶部") 65             { 66                 x = img.Width / 2 - waterimg.Width / 2; 67                // y = img.Height - waterimg.Height; 68                 y = 10; 69             } 70             else if (location == "右上") 71             { 72                 x = img.Width - waterimg.Width; 73                 y = 10; 74             } 75             else if (location == "左中") 76             { 77                 x = 10; 78                 y = img.Height / 2 - waterimg.Height / 2; 79             } 80             else if (location == "中间") 81             { 82                 x = img.Width / 2 - waterimg.Width / 2; 83                 y = img.Height / 2 - waterimg.Height / 2; 84             } 85             else if (location == "右中") 86             { 87                 x = img.Width - waterimg.Width; 88                 y = img.Height / 2 - waterimg.Height / 2; 89             } 90             else if (location == "左下") 91             { 92                 x = 10; 93                 y = img.Height - waterimg.Height; 94             } 95             else if (location == "底部") 96             { 97                 x = img.Width / 2 - waterimg.Width / 2; 98                 y = img.Height - waterimg.Height; 99             }100             else101             {102                 x = img.Width - waterimg.Width;103                 y = img.Height - waterimg.Height;104             }105             loca.Add(x);106             loca.Add(y);107             return loca;108         }109         #endregion