.net 图片合成大图

int pheight = ((imageFiles.Count / num) + 1) * (sheight); //计算大图高度  2   3   4             List<Rectangle> Rects = new List<Rectangle>();  5             List<System.Drawing.Image> imgs = new List<System.Drawing.Image>();  6             System.Drawing.Image img;  7             System.Drawing.Image sImg;  8   9             try 10             { 11  12                 if (picPath == "") 13                 { 14                     img = new Bitmap(pwidth, pheight);//画颜色背景 15                 } 16                 else 17                 { 18                     img = Bitmap.FromFile(picPath);//画图片背景 19                 } 20  21  22                 foreach (string item in imageFiles)//加载小图片; 23                 { 24                     sImg = Bitmap.FromFile(item); 25                     imgs.Add(sImg); 26                 } 27  28                 Pen pen = new Pen(GetColor(borderbg), borderSize);//加边框 29  30  31  32                 //先画行，再画列 33                 for (int i = 0; i < pheight; i += sheight) 34                 { 35                     for (int j = 2; j < pwidth; j += pwidth / num) 36                     { 37                         Rectangle rect = new Rectangle(j, i, swidth, sheight); 38                         Rects.Add(rect); 39                     } 40                 } 41  42  43  44                 Graphics g = Graphics.FromImage(img); 45  46  47                 if (picPath == "") 48                 { 49                     g.Clear(GetColor(imagebg)); 50                 } 51  52  53  54                 string subNum = "";//截取图片后四位做编号 55                 //根据小图的个数画出 56                 for (int i = 0; i < imgs.Count; i++) 57                 { 58                     subNum = imageFiles[i].Substring(imageFiles[i].LastIndexOf("\\") + 1); 59                     if (subNum.IndexOf("-") > 0) 60                     { 61                         subNum = subNum.Substring(0, subNum.IndexOf("-")); 62                     } 63                     else 64                     { 65                         subNum = subNum.Substring(0, subNum.IndexOf(".")); 66                     } 67                     subNum = subNum.Substring(subNum.Length - 4, 4); 68  69                     g.DrawRectangle(pen, Rects[i]);//给每个小图片加上边框 70                     g.DrawImage(imgs[i], Rects[i]); 71                     g.DrawString(subNum, new Font("Arial", 10, FontStyle.Bold), new SolidBrush(Color.Red), Rects[i]); 72                 } 73  74                 string filePath = savePath + "\\" + ProductSKU + "\\" + ProductSKU + ".jpg";//保存路径 75  76                 saveTempPath += "\\" + ProductSKU + ".jpg";//临时工 = =！ 77  78  79                 MemoryStream ms = new MemoryStream();//放入内存，方便页面显示 80                 img.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); 81  82                 if (!Directory.Exists(Path.GetDirectoryName(filePath))) 83                 { 84                     Directory.CreateDirectory(Path.GetDirectoryName(filePath)); 85                 } 86                  87                  88                 if (File.Exists(filePath))//如果存在就替换 89                 { 90                     img.Save(saveTempPath, System.Drawing.Imaging.ImageFormat.Jpeg);//临时工派上上场了 91                     File.Copy(saveTempPath, filePath, true); 92                     if (File.Exists(saveTempPath)) 93                     { 94                         File.Delete(saveTempPath); 95                     } 96                 } 97                 else 98                 { 99                     img.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);//保存100                 }101 102 103                 SplitIMG(filePath, pheight / (sheight), pwidth, sheight, savePath);104 105                 106                 ms.Dispose();107                 g.Dispose();108                 img.Dispose();109 110                 foreach (var i in imgs)111                 {112                     i.Dispose();113                 }114 115                 Response.ClearContent();116                 Response.ContentType = "image/Jpeg";117                 Response.BinaryWrite(ms.ToArray());118             }119             catch (Exception ex)120             {121                 Response.WriteFile(ex.Message);122             }

获取文件夹下的图片

public List<string> ImageFile(string path) 2         { 3             List<string> PicFile = new List<string>(); 4             FileInfo fi; 5             if (!Directory.Exists(path)) 6             { 7                 throw new FileNotFoundException(); 8             } 9 10             foreach (var i in Directory.GetFiles(path))11             {12                 fi = new FileInfo(i);13                 if (fi.Extension.ToLower() == ".jpg" || fi.Extension.ToLower() == ".gif" || fi.Extension.ToLower() == ".bmp")14                 {15                     PicFile.Add(i);16                 }17             }18 19             return PicFile;20         }

分成小图

/// <summary> 2         /// 分成小图 3         /// </summary> 4         /// <param name="filePath">图片路径</param> 5         /// <param name="splitNum">分成几份</param> 6         /// <param name="w"></param> 7         /// <param name="h"></param> 8         /// <param name="savePath"></param> 9         public void SplitIMG(string filePath, int splitNum, int w, int h, string savePath)10         {11 12             Bitmap bitmap;13             Graphics g;14 15             try16             {17                 System.Drawing.Image img = Bitmap.FromFile(filePath);18 19 20                 for (int i = 0; i < splitNum; i++)21                 {22                     using (bitmap = new Bitmap(w, h))23                     {24                         g = Graphics.FromImage(bitmap);25                         g.DrawImage(img, new Rectangle(0, 0, w, h), new Rectangle(0, h * i, w, h), GraphicsUnit.Pixel);26                         bitmap.Save(savePath + "\\" + ProductSKU + "\\" + ProductSKU + "_" + (i + 1) + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);27                     }28                     g.Dispose();29                 }30 31             }32             catch (Exception ex)33             {34                 Response.Write(ex.Message);35                 return;36             }37             finally38             {39             }40         }