C# 將多個Image 合成為一個,格式可選擇

在一些情境中，需要把多個圖片，合（拼）成為一張 ，合成效果樣本：

縱向：

橫向：

代碼實現：

 enum ImageMergeOrientation    {        Horizontal,        Vertical    }

private void CombineImages(FileInfo[] files, string toPath, ImageMergeOrientation mergeType = ImageMergeOrientation.Vertical)        {            //change the location to store the final image.            var finalImage = toPath;            var imgs = files.Select(f => Image.FromFile(f.FullName));            var finalWidth = mergeType == ImageMergeOrientation.Horizontal ?                imgs.Sum(img => img.Width) :                imgs.Max(img => img.Width);            var finalHeight = mergeType == ImageMergeOrientation.Vertical ?                imgs.Sum(img => img.Height) :                imgs.Max(img => img.Height);            var finalImg = new Bitmap(finalWidth, finalHeight);            Graphics g = Graphics.FromImage(finalImg);            g.Clear(SystemColors.AppWorkspace);            var width = finalWidth;            var height = finalHeight;            var nIndex = 0;            foreach (FileInfo file in files)            {                Image img = Image.FromFile(file.FullName);                if (nIndex == 0)                {                    g.DrawImage(img, new Point(0, 0));                    nIndex++;                    width = img.Width;                    height = img.Height;                }                else                {                    switch (mergeType)                    {                        case ImageMergeOrientation.Horizontal:                            g.DrawImage(img, new Point(width, 0));                            width += img.Width;                            break;                        case ImageMergeOrientation.Vertical:                            g.DrawImage(img, new Point(0, height));                            height += img.Height;                            break;                        default:                            throw new ArgumentOutOfRangeException("mergeType");                    }                }                img.Dispose();            }            g.Dispose();            finalImg.Save(finalImage, System.Drawing.Imaging.ImageFormat.Tiff);            finalImg.Dispose();        }

代碼說明：

根據參數進行橫向或縱向合并圖片

如果為橫向，圖片高度為最高的那張；如果縱向則寬度為最寬的那張

UT 代碼：

[TestMethod]        public void Combine_Multiple_SampleImages_IntoOne()        {            const string folderPath = "C:\\Users\\Public\\Pictures\\Sample Pictures";            var images = new DirectoryInfo(folderPath).GetFiles("*.jpg", SearchOption.TopDirectoryOnly);            CombineImages(images, "C:/FinalImage_H.tiff");            CombineImages(images, "C:/FinalImage_V.tiff", ImageMergeOrientation.Vertical);        }

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