据我所知，如果文件的路径太长，则无法直接访问文件（直接，我的意思是使用 的方法File，通过构造函数创建 aFileInfo或使用Directory.GetFiles(string fileName).
我发现让您访问此类文件的唯一方法是在路径中某处的目录变得太长之前访问它，然后以编程方式沿着树向下走，直到您到达您的文件，如此处所示。
我从那里获取了我的代码并对其进行了一些修改，以返回FileInfo一个路径“太长”的文件的对象。使用此代码，您可以访问返回对象的必要属性FileInfo（如LastWriteTime）。 但它仍然有一些限制，例如无法使用CopyTo()或OpenText().
// Only call GetFileWithLongPath() if the path is too long
// ... otherwise, new FileInfo() is sufficient
private static FileInfo GetFile(string path)
{
if (path.Length >= MAX_FILE_PATH)
{
return GetFileWithLongPath(path);
}
else return new FileInfo(path);
}
static int MAX_FILE_PATH = 260;
static int MAX_DIR_PATH = 248;
private static FileInfo GetFileWithLongPath(string path)
{
string[] subpaths = path.Split('\\');
StringBuilder sbNewPath = new StringBuilder(subpaths[0]);
// Build longest sub-path that is less than MAX_PATH characters
for (int i = 1; i < subpaths.Length; i++)
{
if (sbNewPath.Length + subpaths[i].Length >= MAX_DIR_PATH)
{
subpaths = subpaths.Skip(i).ToArray();
break;
}
sbNewPath.Append("\\" + subpaths[i]);
}
DirectoryInfo dir = new DirectoryInfo(sbNewPath.ToString());
bool foundMatch = dir.Exists;
if (foundMatch)
{
// Make sure that all of the subdirectories in our path exist.
// Skip the last entry in subpaths, since it is our filename.
// If we try to specify the path in dir.GetDirectories(),
// We get a max path length error.
int i = 0;
while (i < subpaths.Length - 1 && foundMatch)
{
foundMatch = false;
foreach (DirectoryInfo subDir in dir.GetDirectories())
{
if (subDir.Name == subpaths[i])
{
// Move on to the next subDirectory
dir = subDir;
foundMatch = true;
break;
}
}
i++;
}
if (foundMatch)
{
// Now that we've gone through all of the subpaths, see if our file exists.
// Once again, If we try to specify the path in dir.GetFiles(),
// we get a max path length error.
foreach (FileInfo fi in dir.GetFiles())
{
if (fi.Name == subpaths[subpaths.Length - 1])
{
return fi;
}
}
}
}
// If we didn't find a match, return null;
return null;
}
既然你已经看到了，那就去冲洗你的眼睛并缩短你的路径。