多图片的合并（2种方式，可以设置间距）

图片的合并

  /// <summary>
        /// 图片合并
        /// </summary>
        /// <param name="list">图片路径列表</param>
        /// <param name="row">行数</param>
        /// <param name="cloumn">列数</param>
        /// <returns>生成的图片的文件名/错误消息</returns>
        public static string MergeImage(List<string> list, int row, int cloumn, int width, int height)
        {
            if (list.Count != row * cloumn)
                return "行列乘积不等于列表总数！";//不符合标准
            Bitmap[] Capture = new Bitmap[list.Count];   // 要合并的图片的集合
            int ImageWidth = 0;
            int ImageHight = 0;
            int maxHeight = 0;
            int maxWidth = 0;
            ///控制图片的行宽度
            for (int i = 0; i < list.Count; i++)
            {
                try
                {
                    Capture[i] = new Bitmap(list[i].ToString());
                }
                catch (Exception e)
                {
                    return "列表中图片" + i + "转换异常";
                }
                if (Capture[i].Height > ImageHight)
                {
                    ImageHight = Capture[i].Height;
                }
                if (Capture[i].Width > ImageWidth)
                {
                    ImageWidth = Capture[i].Width;
                }
            }
            ///获取图片列表中的最高值，和最宽值


            maxWidth = ImageWidth;
            maxHeight = ImageHight;

            ImageWidth = ImageWidth * cloumn;
            ImageHight = ImageHight * row;

            Bitmap x = new Bitmap(ImageWidth, ImageHight);
            Graphics g = Graphics.FromImage(x);

            int tempX = 0;
            int tempY = 0;
            int bb = 0;
            for (int a = 0; a < row; a++)
            {
                for (int b = 0; b < cloumn; b++)
                {
                    ///画图片
                    g.DrawImage(Capture[bb], tempX, tempY, Capture[bb].Width, Capture[bb].Height);
                    //g.DrawImage(Capture[bb], tempX, tempY, width, height);
                    tempX = tempX + maxWidth;
                    bb++;//前提条件是a*b=Capture.Length
                }
                tempX = 0;
                tempY = tempY + maxHeight;//由于这里的每个图片的高度都是固定的，所以随便取的图片的高度
            }
            string imgName = DateTime.Now.ToFileTimeUtc().ToString() + ".jpg";
            //目录若不存在，则创建
            if (!Directory.Exists(MWHelper.mergeImg_path))
                Directory.CreateDirectory(MWHelper.mergeImg_path);

            string path = MWHelper.mergeImg_path + imgName;//生成日志文件名/

            try
            {
                x.Save(path);
            }
            catch (Exception e)
            {                
                return "保存合并之后的图片时发生异常！";
            }
            return path;
        }


        /// <summary>
        /// 图片合并
        /// </summary>
        /// <param name="list">图片列表</param>
        /// <param name="row">行数</param>
        /// <param name="cloumn">列数</param>
        /// <param name="width">生成的图片的宽度</param>
        /// <param name="height">生成图片的高度</param>
        /// <param name="character">图片之间的间隙</param>
        /// <returns></returns>
        public static string MergeImage(List<string> list, int row, int cloumn, int width, int height, int character)
        {
            if (list.Count != row * cloumn)
                return "行列乘积不等于列表总数！";//不符合标准
            Bitmap[] Capture = new Bitmap[list.Count];   // 要合并的图片的集合

            int maxHeight = 0;
            int maxWidth = 0;
            ///控制图片的行宽度
            for (int i = 0; i < list.Count; i++)
            {
                try
                {
                    Capture[i] = new Bitmap(list[i].ToString());
                }
                catch (Exception e)
                {
                    return "列表中图片" + i + "转换异常";
                }
            }
            ///获取图片列表中的最高值，和最宽值
            maxWidth = (width - (cloumn - 1) * character) / cloumn;
            maxHeight = (height - (row - 1) * character) / row;

            Bitmap x = new Bitmap(width, height);
            Graphics g = Graphics.FromImage(x);

            int tempX = 0;
            int tempY = 0;
            int bb = 0;
            for (int a = 0; a < row; a++)
            {
                for (int b = 0; b < cloumn; b++)
                {
                    ///画图片
                    g.DrawImage(Capture[bb], tempX, tempY, maxWidth, maxHeight);
                    tempX = tempX + maxWidth + character;
                    bb++;//前提条件是a*b=Capture.Length
                }
                tempX = 0;
                tempY = tempY + maxHeight + character;//由于这里的每个图片的高度都是固定的，所以随便取的图片的高度
            }
            string imgName = DateTime.Now.ToFileTimeUtc().ToString() + ".jpg";
            //目录若不存在，则创建
            if (!Directory.Exists(MWHelper.mergeImg_path))
                Directory.CreateDirectory(MWHelper.mergeImg_path);

            string path = MWHelper.mergeImg_path + imgName;//生成日志文件名/

            try
            {
                x.Save(path);

            }
            catch (Exception e)
            {
                return "保存合并之后的图片时发生异常！";
            }
            return path;
        }