如何(快速)检查UNC路径可 [英] How to (quickly) check if UNC Path is available
问题描述
我如何检查是否UNC路径可用?
我有一个检查过程约半分钟,如果份额的不可以可用的问题:
How can I check if a UNC Path is available? I have the problem that the check takes about half a minute if the share is not available :
var fi = new DirectoryInfo(@"\\hostname\samba-sharename\directory");
if (fi.Exists)
//...
有没有检查,如果一个文件夹可用更快的方法?
我使用Windows XP和C#。
Is there a faster way to check if a folder is available? I'm using Windows XP and C#.
推荐答案
这个怎么样的一个快速和肮脏的方法来检查 - 运行Windows NET USE
命令和解析对于感兴趣的网络路径的线路输出(如 \\\\ vault2
)和确定
。下面是输出的一个例子:
How's this for a quick and dirty way to check - run the windows net use
command and parse the output for the line with the network path of interest (e.g. \\vault2
) and OK
. Here's an example of the output:
C:\>net use
New connections will be remembered.
Status Local Remote Network
-------------------------------------------------------------------------------
OK O: \\smarty\Data Microsoft Windows Network
Disconnected P: \\dummy\Data Microsoft Windows Network
OK \\vault2\vault2 Microsoft Windows Network
The command completed successfully.
这不是一个很.netish的解决方案,但它的速度非常快,有时是更重要: - )
It's not a very .netish solution, but it's very fast, and sometimes that matters more :-).
和这里的code做它(LINQPad告诉我,只需要 150ms的,所以这是很好的)
And here's the code to do it (and LINQPad tells me that it only takes 150ms, so that's nice)
void Main()
{
bool available = QuickBestGuessAboutAccessibilityOfPath(@"\\vault2\vault2\dir1\dir2");
Console.WriteLine(available);
}
public static bool QuickBestGuessAboutAccessibilityOfNetworkPath(string path)
{
if (string.IsNullOrEmpty(path)) return false;
string pathRoot = Path.GetPathRoot(path);
if (string.IsNullOrEmpty(pathRoot)) return false;
ProcessStartInfo pinfo = new ProcessStartInfo("net", "use");
pinfo.CreateNoWindow = true;
pinfo.RedirectStandardOutput = true;
pinfo.UseShellExecute = false;
string output;
using (Process p = Process.Start(pinfo)) {
output = p.StandardOutput.ReadToEnd();
}
foreach (string line in output.Split('\n'))
{
if (line.Contains(pathRoot) && line.Contains("OK"))
{
return true; // shareIsProbablyConnected
}
}
return false;
}
或者,你也许可以去使用 WMI ,如提到的<一个HREF =http://stackoverflow.com/a/8993155/116891>这个答案以<一个href=\"http://stackoverflow.com/questions/8876022/how-to-ensure-network-drives-are-connected-for-an-application\">How确保网络驱动器连接为一个应用程序?
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