C#合并文件夹图片列表 自定义排版顺序

本次程序编写主要为了将pdf word等文档转换为图片后设置不同的打印排版

前提 目标文件夹中的图片高宽都是一致的

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/// <summary> /// 合并图片 /// </summary> /// <param name="savedictory">文件保存目录</param> /// <param name="singlePageNumber">单页排版</param> /// <param name="path">文件列表</param> /// public static void MergedImage(string[] path, SinglePageNumber singlePageNumber,string savedictory) {     //获取目录路径列表     var i = path.Length % (int)singlePageNumber > 0 ? (path.Length / (int)singlePageNumber + 1) : path.Length / (int)singlePageNumber;     for (int s = 0; s < i; s++)     {         List<Bitmap> bitmapList = new List<Bitmap>();         List<string> imgPathTake = path.Skip((s - 1) * (int)singlePageNumber).Take((int)singlePageNumber).ToList();         foreach (var pathItem in imgPathTake)             bitmapList.Add(new Bitmap(pathItem));         //2=1x2 4=2x2 6=2x3 9=3x3 16=4x4         Bitmap map = null;         switch (singlePageNumber)         {             case SinglePageNumber.two:                 map = mergeImage(2, 1, bitmapList);                 break;             case SinglePageNumber.four:                 map = mergeImage(2, 2, bitmapList);                   break;             case SinglePageNumber.six:                 map = mergeImage(3, 2, bitmapList);                   break;             case SinglePageNumber.nine:                 map = mergeImage(3, 3, bitmapList);                   break;             case SinglePageNumber.Sixteen:                 map = mergeImage(4, 4, bitmapList);                 break;             default:                 break;         }         map.Save(savedictory + "\\" + s+".png");     }     } /// <summary> /// 合并图片文件 传入的图片宽高要一致 /// </summary> /// <param name="wi">一排有几张</param> /// <param name="hi">一列有几张</param> /// <param name="mapList"></param> public static Bitmap mergeImage(int wi, int hi, List<Bitmap> mapList) {       int width = mapList.First().Width;     int height = mapList.First().Height;     Bitmap bitmap = new Bitmap(width * wi, height * hi);     //x表示图片在第几行y表示图片在第几列     int mapIndex = 0;     for (int y = 1; y <= hi; y++)     {         for (int x = 1; x <= wi; x++)     {             if (mapIndex == mapList.Count )             {                 foreach (var item in mapList)                     item.Dispose();                 return bitmap;             }             var map = mapList[mapIndex];             mapIndex++;             for (int w = 1; w <= width; w++)                 for (int h = 1; h <= height; h++)                 {                     var color = map.GetPixel(w - 1, h - 1);                     bitmap.SetPixel(((x-1)*width)+w - 1, ((y - 1) * height) + h - 1, color);                 }           }     }     foreach (var item in mapList)         item.Dispose();     return bitmap;   }

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/// <summary> /// 每版打印几页 单页的不用处理 /// </summary> public enum SinglePageNumber   {     two = 2,     four = 4,     six = 6,     nine = 9,     Sixteen = 16, }

　　

　　

设置图片排版为2*3的效果

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string dictory = @"D:\test\testpdf2convert\";        string[] path = System.IO.Directory.GetFiles(dictory);        ImagePrintHp.MergedImage(path, SinglePageNumber.six, dictory);

　　效果

2*2效果