{"id":1487,"date":"2023-05-24T08:40:25","date_gmt":"2023-05-24T00:40:25","guid":{"rendered":"https:\/\/sanlangcode.com\/?p=1487"},"modified":"2023-05-24T08:40:25","modified_gmt":"2023-05-24T00:40:25","slug":"c%e5%ae%9e%e7%8e%b0%e5%af%b9%e5%9b%be%e7%89%87%e6%8e%92%e5%ba%8f%ef%bc%8c%e4%bf%ae%e6%94%b9%ef%bc%8c%e5%8e%8b%e7%bc%a9%ef%bc%8c%e8%bd%ac%e6%8d%a2%ef%bc%8c%e5%88%86%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/sanlangcode.com\/index.php\/2023\/05\/24\/c%e5%ae%9e%e7%8e%b0%e5%af%b9%e5%9b%be%e7%89%87%e6%8e%92%e5%ba%8f%ef%bc%8c%e4%bf%ae%e6%94%b9%ef%bc%8c%e5%8e%8b%e7%bc%a9%ef%bc%8c%e8%bd%ac%e6%8d%a2%ef%bc%8c%e5%88%86%e7%b1%bb\/","title":{"rendered":"C#\u5b9e\u73b0\u5bf9\u56fe\u7247\u6392\u5e8f\uff0c\u4fee\u6539\uff0c\u5220\u9664\uff0c\u538b\u7f29\uff0c\u8f6c\u6362\uff0c\u5206\u7c7b\uff0c\u4fdd\u5b58"},"content":{"rendered":"\n<p>\u5904\u7406\u5927\u91cf\u56fe\u7247\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528C#\u7684System.Drawing\u547d\u540d\u7a7a\u95f4\u548cGDI+\u8fdb\u884c\u5b9e\u73b0\u3002<\/p>\n\n\n\n<p>\u9996\u5148\uff0c\u9700\u8981\u5728\u4ee3\u7801\u4e2d\u5f15\u7528System.Drawing\u548cSystem.IO\u3002<\/p>\n\n\n\n<p>\u7136\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528Image.FromFile\u65b9\u6cd5\u8bfb\u53d6\u56fe\u7247\u5e76\u8fdb\u884c\u5904\u7406\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u8c03\u6574\u56fe\u7247\u5927\u5c0f\u3001\u4fee\u6539\u50cf\u7d20\u3001\u8f6c\u6362\u683c\u5f0f\u7b49\u3002<\/p>\n\n\n\n<p>\u82e5\u9700\u8981\u540c\u65f6\u5904\u7406\u591a\u4e2a\u56fe\u7247\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u7ebf\u7a0b\u6216\u5f02\u6b65\u5904\u7406\u3002\u53ef\u4ee5\u4f7f\u7528Parallel.ForEach\u65b9\u6cd5\u521b\u5efa\u591a\u7ebf\u7a0b\uff0c\u6216\u4f7f\u7528async\u548cawait\u5173\u952e\u5b57\u8fdb\u884c\u5f02\u6b65\u5904\u7406\u3002<\/p>\n\n\n\n<p>\u53e6\u5916\uff0c\u4e3a\u4e86\u907f\u514d\u5185\u5b58\u6ea2\u51fa\uff0c\u9700\u8981\u53ca\u65f6\u91ca\u653e\u56fe\u7247\u8d44\u6e90\u3002\u53ef\u4ee5\u4f7f\u7528Dispose\u65b9\u6cd5\u91ca\u653e\u5df2\u7ecf\u5904\u7406\u8fc7\u7684\u56fe\u7247\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u6f14\u793a\u5982\u4f55\u8bfb\u53d6\u3001\u8c03\u6574\u5927\u5c0f\u5e76\u4fdd\u5b58\u591a\u4e2a\u56fe\u7247\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using System.Drawing;\nusing System.IO;\n\nnamespace ImageProcessing\n{\n    class Program\n    {\n        static void Main(string&#91;] args)\n        {\n            \/\/ \u8bfb\u53d6\u56fe\u7247\n            Image image = Image.FromFile(\"image.jpg\");\n\n            \/\/ \u8c03\u6574\u5927\u5c0f\n            int newWidth = 800;\n            int newHeight = (int)(image.Height * ((float)newWidth \/ image.Width));\n            Image newImage = new Bitmap(newWidth, newHeight);\n            Graphics graphics = Graphics.FromImage(newImage);\n            graphics.DrawImage(image, new Rectangle(0, 0, newWidth, newHeight), new Rectangle(0, 0, image.Width, image.Height), GraphicsUnit.Pixel);\n            graphics.Dispose();\n\n            \/\/ \u4fdd\u5b58\u56fe\u7247\n            string path = \"newImage.jpg\";\n            if (File.Exists(path))\n            {\n                File.Delete(path);\n            }\n            newImage.Save(path);\n\n            \/\/ \u91ca\u653e\u8d44\u6e90\n            image.Dispose();\n            newImage.Dispose();\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<p>1.\u00a0\u00a0\u83b7\u53d6\u56fe\u7247\u5927\u5c0f<\/p>\n\n\n\n<p>\u4f7f\u7528C#\u7684System.IO\u547d\u540d\u7a7a\u95f4\u4e2d\u7684FileInfo\u7c7b\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u83b7\u53d6\u56fe\u7247\u7684\u5927\u5c0f\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using System.IO;\n\n\/\/ \u83b7\u53d6\u56fe\u7247\u5927\u5c0f\nFileInfo fileInfo = new FileInfo(\"image.jpg\");\nlong fileSize = fileInfo.Length; \/\/ \u5355\u4f4d\u4e3a\u5b57\u8282\n<\/code><\/pre>\n\n\n\n<p>2.&nbsp;&nbsp;\u56fe\u7247\u5927\u5c0f\u6392\u5e8f<\/p>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528Linq\u8fdb\u884c\u56fe\u7247\u5927\u5c0f\u6392\u5e8f\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using System.Linq;\nusing System.IO;\n\n\/\/ \u83b7\u53d6\u6240\u6709\u56fe\u7247\u7684\u5927\u5c0f\nDirectoryInfo directoryInfo = new DirectoryInfo(\"images\");\nFileInfo&#91;] files = directoryInfo.GetFiles(\"*.*\", SearchOption.AllDirectories)\n    .Where(file => file.Extension.ToLower() == \".jpg\" || file.Extension.ToLower() == \".png\").ToArray();\nlong&#91;] fileSizes = files.Select(file => file.Length).ToArray();\n\n\/\/ \u5bf9\u56fe\u7247\u5927\u5c0f\u8fdb\u884c\u6392\u5e8f\nvar sorted = files.OrderBy(file => file.Length);\n<\/code><\/pre>\n\n\n\n<p>3.&nbsp;&nbsp;\u56fe\u7247\u540d\u79f0\u6392\u5e8f<\/p>\n\n\n\n<p>\u540c\u6837\u53ef\u4ee5\u4f7f\u7528Linq\u8fdb\u884c\u56fe\u7247\u540d\u79f0\u6392\u5e8f\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using System.Linq;\nusing System.IO;\n\n\/\/ \u83b7\u53d6\u6240\u6709\u56fe\u7247\u7684\u540d\u79f0\nDirectoryInfo directoryInfo = new DirectoryInfo(\"images\");\nFileInfo&#91;] files = directoryInfo.GetFiles(\"*.*\", SearchOption.AllDirectories)\n    .Where(file => file.Extension.ToLower() == \".jpg\" || file.Extension.ToLower() == \".png\").ToArray();\nstring&#91;] fileNames = files.Select(file => file.Name).ToArray();\n\n\/\/ \u5bf9\u56fe\u7247\u540d\u79f0\u8fdb\u884c\u6392\u5e8f\nvar sorted = files.OrderBy(file => file.Name);\n<\/code><\/pre>\n\n\n\n<p>4.&nbsp;&nbsp;\u56fe\u7247\u65e5\u671f\u6392\u5e8f<\/p>\n\n\n\n<p>\u540c\u6837\u53ef\u4ee5\u4f7f\u7528Linq\u8fdb\u884c\u56fe\u7247\u65e5\u671f\u6392\u5e8f\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using System.Linq;\nusing System.IO;\n\n\/\/ \u83b7\u53d6\u6240\u6709\u56fe\u7247\u7684\u65e5\u671f\nDirectoryInfo directoryInfo = new DirectoryInfo(\"images\");\nFileInfo&#91;] files = directoryInfo.GetFiles(\"*.*\", SearchOption.AllDirectories)\n    .Where(file => file.Extension.ToLower() == \".jpg\" || file.Extension.ToLower() == \".png\").ToArray();\nDateTime&#91;] fileDates = files.Select(file => file.LastWriteTime).ToArray();\n\n\/\/ \u5bf9\u56fe\u7247\u65e5\u671f\u8fdb\u884c\u6392\u5e8f\nvar sorted = files.OrderBy(file => file.LastWriteTime);\n<\/code><\/pre>\n\n\n\n<p>5.&nbsp;&nbsp;\u4fee\u6539\u56fe\u7247\u540d\u79f0<\/p>\n\n\n\n<p>\u4f7f\u7528FileInfo\u7684MoveTo\u65b9\u6cd5\u53ef\u4ee5\u8f7b\u677e\u4fee\u6539\u56fe\u7247\u7684\u540d\u79f0\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using System.IO;\n\n\/\/ \u4fee\u6539\u56fe\u7247\u540d\u79f0\nFileInfo fileInfo = new FileInfo(\"image.jpg\");\nfileInfo.MoveTo(\"newImage.jpg\");\n<\/code><\/pre>\n\n\n\n<p>6.&nbsp;&nbsp;\u4fee\u6539\u56fe\u7247\u5927\u5c0f<\/p>\n\n\n\n<p>\u4f7f\u7528Graphics.DrawImage\u65b9\u6cd5\u53ef\u4ee5\u8c03\u6574\u56fe\u7247\u5927\u5c0f\u3002\u4f8b\u5982\uff1a\u3001<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using System.Drawing;\nusing System.IO;\n\n\/\/ \u4fee\u6539\u56fe\u7247\u5927\u5c0f\nImage image = Image.FromFile(\"image.jpg\");\nint newWidth = 800;\nint newHeight = (int)(image.Height * ((float)newWidth \/ image.Width));\nImage newImage = new Bitmap(newWidth, newHeight);\nGraphics graphics = Graphics.FromImage(newImage);\ngraphics.DrawImage(image, new Rectangle(0, 0, newWidth, newHeight), new Rectangle(0, 0, image.Width, image.Height), GraphicsUnit.Pixel);\ngraphics.Dispose();\nnewImage.Save(\"newImage.jpg\");\n<\/code><\/pre>\n\n\n\n<p>7.&nbsp;&nbsp;\u4fee\u6539\u50cf\u7d20<\/p>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528Bitmap\u7684SetPixel\u65b9\u6cd5\u4fee\u6539\u56fe\u7247\u7684\u50cf\u7d20\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using System.Drawing;\nusing System.IO;\n\n\/\/ \u4fee\u6539\u56fe\u7247\u50cf\u7d20\nBitmap bitmap = new Bitmap(\"image.jpg\");\nfor (int y = 0; y &lt; bitmap.Height; y++)\n{\n    for (int x = 0; x &lt; bitmap.Width; x++)\n    {\n        Color color = bitmap.GetPixel(x, y);\n        if (color.B > 128)\n        {\n            bitmap.SetPixel(x, y, Color.White);\n        }\n        else\n        {\n            bitmap.SetPixel(x, y, Color.Black);\n        }\n    }\n}\nbitmap.Save(\"newImage.jpg\");\n<\/code><\/pre>\n\n\n\n<p>8.&nbsp;&nbsp;\u8f6c\u6362\u56fe\u7247\u683c\u5f0f<\/p>\n\n\n\n<p>\u4f7f\u7528Image.Save\u65b9\u6cd5\u53ef\u4ee5\u5c06\u56fe\u7247\u683c\u5f0f\u8f6c\u6362\u4e3a\u5176\u4ed6\u683c\u5f0f\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using System.Drawing;\nusing System.IO;\n\n\/\/ \u8f6c\u6362\u56fe\u7247\u683c\u5f0f\nImage image = Image.FromFile(\"image.jpg\");\nimage.Save(\"newImage.png\", System.Drawing.Imaging.ImageFormat.Png);\n<\/code><\/pre>\n\n\n\n<p>9.&nbsp;&nbsp;\u56fe\u7247\u538b\u7f29<\/p>\n\n\n\n<p>\u4f7f\u7528EncoderParameter\u548cEncoderParameters\u53ef\u4ee5\u8fdb\u884c\u56fe\u7247\u538b\u7f29\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using System.Drawing;\nusing System.Drawing.Imaging;\nusing System.IO;\n\n\/\/ \u56fe\u7247\u538b\u7f29\nImage image = Image.FromFile(\"image.jpg\");\nEncoderParameter qualityParam = new EncoderParameter(Encoder.Quality, 50L); \/\/ \u538b\u7f29\u8d28\u91cf\u4e3a50%\nEncoderParameters encoderParams = new EncoderParameters(1);\nencoderParams.Param&#91;0] = qualityParam;\nImageCodecInfo jpegCodec = ImageCodecInfo.GetImageDecoders().First(codec => codec.FormatID == ImageFormat.Jpeg.Guid);\nimage.Save(\"newImage.jpg\", jpegCodec, encoderParams);\n<\/code><\/pre>\n\n\n\n<p>10.&nbsp;&nbsp;\u56fe\u7247\u5206\u7c7b<\/p>\n\n\n\n<p>\u53ef\u4ee5\u6839\u636e\u56fe\u7247\u7684Exif\u4fe1\u606f\u8fdb\u884c\u5206\u7c7b\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>using System.Drawing;\nusing System.Drawing.Imaging;\nusing System.IO;\nusing System.Linq;\n\n\/\/ \u56fe\u7247\u5206\u7c7b\nDirectoryInfo directoryInfo = new DirectoryInfo(\"images\");\nFileInfo&#91;] files = directoryInfo.GetFiles(\"*.*\", SearchOption.AllDirectories)\n    .Where(file => file.Extension.ToLower() == \".jpg\" || file.Extension.ToLower() == \".png\").ToArray();\nforeach (FileInfo file in files)\n{\n    Image image = Image.FromFile(file.FullName);\n    PropertyItem propertyItem = image.GetPropertyItem(36867); \/\/ Exif\u4fe1\u606f\u4e2d\u7684\u62cd\u6444\u65e5\u671f\n    string dateStr = Encoding.ASCII.GetString(propertyItem.Value).Trim('\\0');\n    DateTime date = DateTime.ParseExact(dateStr, \"yyyy:MM:dd HH:mm:ss\", System.Globalization.CultureInfo.InvariantCulture);\n    string path = Path.Combine(directoryInfo.FullName, date.Year.ToString(), date.Month.ToString(), date.Day.ToString());\n    if (!Directory.Exists(path))\n    {\n        Directory.CreateDirectory(path);\n    }\n    string newPath = Path.Combine(path, file.Name);\n    if (File.Exists(newPath))\n    {\n        File.Delete(newPath);\n    }\n    File.Move(file.FullName, newPath);\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5904\u7406\u5927\u91cf\u56fe\u7247\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528C#\u7684S&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":1488,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"class_list":["post-1487","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/sanlangcode.com\/index.php\/wp-json\/wp\/v2\/posts\/1487","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sanlangcode.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sanlangcode.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sanlangcode.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sanlangcode.com\/index.php\/wp-json\/wp\/v2\/comments?post=1487"}],"version-history":[{"count":0,"href":"https:\/\/sanlangcode.com\/index.php\/wp-json\/wp\/v2\/posts\/1487\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sanlangcode.com\/index.php\/wp-json\/"}],"wp:attachment":[{"href":"https:\/\/sanlangcode.com\/index.php\/wp-json\/wp\/v2\/media?parent=1487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sanlangcode.com\/index.php\/wp-json\/wp\/v2\/categories?post=1487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sanlangcode.com\/index.php\/wp-json\/wp\/v2\/tags?post=1487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}