当路径长度>256 时，Alphaleonis File.OpenRead() 抛出 "The system cannot find the path specified."

Question

我在打开路径长度 > 256 的图像时遇到问题。我正在使用 Alphaleonis，它适用于我复制和查找文件，但在

System.IO.FileStream file = Alphaleonis.Win32.Filesystem.File.OpenRead(item)

当路径超过 256 个字符时会抛出异常 ("The system cannot find the path specified.")。完整方法：

public static List<System.Drawing.Image> Find(string folderPath, string filenameOrPart)
        {
            List<System.Drawing.Image> imges = new List<System.Drawing.Image>();
            try
            {
                List<string> filesInFolder = Alphaleonis.Win32.Filesystem.Directory.GetFiles(folderPath).ToList();
                List<string> filesFound = filesInFolder.Where(f => f.Replace(folderPath, "").Contains(filenameOrPart)).ToList();
                foreach (var item in filesFound)
                {
                    int pathLen = item.Length;
                    try
                    {
                        using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
                        using (System.IO.FileStream file = Alphaleonis.Win32.Filesystem.File.OpenRead(item))
                        {
                            byte[] bytes = new byte[file.Length];
                            int read;
                            while ((read = file.Read(bytes, 0, (int)file.Length)) > 0)
                            {
                                ms.Write(bytes, 0, read);
                            }
                            imges.Add(System.Drawing.Image.FromStream(ms));
                        }
                    }
                    catch (Exception e)
                    {
                        //dont add pic
                    }
                }
            }
            catch (Exception)
            {
                //return empty list
            }
            return imges;
        }

它适用于 pathLen < 257 的图像，但如果路径较长则进入内部捕获。有什么建议么？提前致谢！

编辑：附加信息：图像位于网络驱动器上

Edit2：需要更新 Alphaleonis 并按照接受的答案调用方法。

Answer 1

我不确定你的情况。但是，要读取长度超过 256 的文件的详细信息，请尝试 Path.Combine(@"\?\", "your folder path")

我试过下面的代码，文件夹长度超过 300 并且有效

string path = "C:\1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234";
        int filesCountOnShareDrive = Directory.GetFiles(Path.Combine(@"\?\", path))
                            .Where(x => new FileInfo(x).CreationTime.Date == DateTime.Today.Date).Count();

更新：

我不知道为什么它不适合你。但是，下面的代码对我来说很好

public static List<System.Drawing.Image> Find(string folderPath, string filenameOrPart)
    {
        List<System.Drawing.Image> imges = new List<System.Drawing.Image>();
        try
        {
            List<string> filesInFolder = Directory.GetFiles(folderPath).ToList();
            List<string> filesFound = filesInFolder.Where(f => f.Replace(folderPath, "").Contains(filenameOrPart)).ToList();
            foreach (var item in filesFound)
            {
                int pathLen = item.Length;
                try
                {
                    using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
                    using (System.IO.FileStream file = File.OpenRead(item))
                    {
                        byte[] bytes = new byte[file.Length];
                        int read;
                        while ((read = file.Read(bytes, 0, (int)file.Length)) > 0)
                        {
                            ms.Write(bytes, 0, read);
                        }
                        imges.Add(System.Drawing.Image.FromStream(ms));
                    }
                }
                catch (Exception e)
                {
                    //dont add pic
                }
            }
        }
        catch (Exception)
        {
            //return empty list
        }
        return imges;
    }

调用下面的部分

 string path = "C:\1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234";
        Find(Path.Combine(@"\?\", path), "Test");

测试图片放在文件夹内

当路径长度>256 时，Alphaleonis File.OpenRead() 抛出 "The system cannot find the path specified."

Alphaleonis File.OpenRead() throws "The system cannot find the path specified." when pathlength>256

c#

system.drawing

filepath

pathtoolongexception

system.io.file