[英]Access to the directory denied in C# - Console Application
我正在尝试访问“文档”目录和子目录,但是每次它说访问被拒绝时。 我看到异常:
System.UnauthorizedAccessException:拒绝访问路径“ C:\\ Users \\ MyUser \\ Documents \\ My Music”
这是我的代码-我要做的就是获取此目录的总大小。
class Program
{
static void Main(string[] args)
{
try {
// Make a reference to a directory.
string path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
DirectoryInfo di = new DirectoryInfo(path);
// Get a reference to each file in that directory.
FileInfo[] fiArr = di.GetFiles(".", SearchOption.AllDirectories);
// Display the names and sizes of the files.
Console.WriteLine("The directory {0} contains the following files:", di.Name);
long size = 0;
foreach (FileInfo f in fiArr)
{
size += f.Length;
size++;
}
Console.WriteLine("The size of desktop files." + size);
}
catch(Exception e)
{
Console.WriteLine("Exceptions {0}" , e);
}
}
}
从略读此线程的过程中我可以发现,这些文件夹是为Windows向后兼容而提供的软链接。
为了解决编码问题,您可以进行自己的递归文件夹搜索,该搜索将忽略当当前用户无权访问给定文件夹时引发的异常。
大概是这样的:
static IEnumerable<FileInfo> GetAllFilesRecursive(string path)
{
var di = new DirectoryInfo(path);
var files = new List<FileInfo>();
files.AddRange(di.GetFiles("."));
foreach (var directory in Directory.GetDirectories(path))
{
try
{
files.AddRange(GetAllFilesRecursive(directory));
}
catch (UnauthorizedAccessException) // ignore directories which the user does not have access to
{}
}
return files;
}
然后重写代码以使用新功能:
static void Main(string[] args)
{
try
{
// Make a reference to a directory.
string path = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
var fiArr = GetAllFilesRecursive(path);
// Display the names and sizes of the files.
Console.WriteLine("The directory {0} contains the following files:", path);
long size = 0;
foreach (FileInfo f in fiArr)
{
size += f.Length;
size++;
}
Console.WriteLine("The size of desktop files." + size);
}
catch (Exception e)
{
Console.WriteLine("Exceptions {0}", e);
}
}
搜索应该在TopDirectoryOnly上,而不是在AllDirectories上。
问题在这一行:
FileInfo[] fiArr = di.GetFiles(".", SearchOption.AllDirectories);
更改为:
FileInfo[] fiArr = di.GetFiles(".", SearchOption.TopDirectoryOnly);
这应该工作。
一些SpecialFolders需要特定的Admin特权才能毫无例外地运行。 您必须以管理员权限运行代码。
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