问题描述
我想显示所选目录中的所有文件的列表(也可以选择任何子目录)。我遇到的问题是,当的GetFiles()方法遇到它无法访问,它抛出一个异常文件夹并且进程将停止。
如何忽略此异常(并忽略受保护的文件夹/文件),并继续添加访问的文件到列表中?
尝试
{
如果(cbSubFolders.Checked == FALSE)
{
字符串[] =文件Directory.GetFiles(folderBrowserDialog1.SelectedPath);
的foreach(在文件中字符串文件名)
ProcessFile(文件名);
}
其他
{
字符串[] =文件Directory.GetFiles(folderBrowserDialog1.SelectedPath,SearchOption.AllDirectories*。*);
的foreach(在文件中字符串文件名)
ProcessFile(文件名);
}
lblNumberOfFilesDisplay.Enabled = TRUE;
}
赶上(UnauthorizedAccessException){}
最后{}
您必须手动完成递归;不要使用AllDirectories - 一次看一个文件夹,然后尝试从子迪尔斯获得的文件。未经检验的,但类似下面(注意使用委托,而不是建立一个数组):
使用系统;
使用System.IO;
静态类节目
{
静态无效的主要()
{
字符串路径=; // 去做
ApplyAllFiles(路径,ProcessFile);
}
静态无效ProcessFile(字符串路径){/ * ... * /}
静态无效ApplyAllFiles(字符串的文件夹,动作<串GT; fileAction)
{
的foreach(在Directory.GetFiles字符串的文件(文件夹))
{
fileAction(文件);
}
的foreach(在Directory.GetDirectories串子目录(文件夹))
{
尝试
{
ApplyAllFiles(子目录,fileAction);
}
抓住
{
//燕子,日志,无论
}
}
}
}
I am trying to display a list of all files found in the selected directory (and optionally any subdirectories). The problem I am having is that when the GetFiles() method comes across a folder that it cannot access, it throws an exception and the process stops.
How do I ignore this exception (and ignore the protected folder/file) and continue adding accessible files to the list?
try
{
if (cbSubFolders.Checked == false)
{
string[] files = Directory.GetFiles(folderBrowserDialog1.SelectedPath);
foreach (string fileName in files)
ProcessFile(fileName);
}
else
{
string[] files = Directory.GetFiles(folderBrowserDialog1.SelectedPath, "*.*", SearchOption.AllDirectories);
foreach (string fileName in files)
ProcessFile(fileName);
}
lblNumberOfFilesDisplay.Enabled = true;
}
catch (UnauthorizedAccessException) { }
finally {}
You will have to do the recursion manually; don't use AllDirectories - look one folder at a time, then try getting the files from sub-dirs. Untested, but something like below (note uses a delegate rather than building an array):
using System;
using System.IO;
static class Program
{
static void Main()
{
string path = ""; // TODO
ApplyAllFiles(path, ProcessFile);
}
static void ProcessFile(string path) {/* ... */}
static void ApplyAllFiles(string folder, Action<string> fileAction)
{
foreach (string file in Directory.GetFiles(folder))
{
fileAction(file);
}
foreach (string subDir in Directory.GetDirectories(folder))
{
try
{
ApplyAllFiles(subDir, fileAction);
}
catch
{
// swallow, log, whatever
}
}
}
}
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