在Powershell中也是一样

function Test-FileOpen
{
    Param
    ([string]$FileToOpen)
    try
    {
        $openFile =([system.io.file]::Open($FileToOpen,[system.io.filemode]::Open))
        $open =$true
        $openFile.close()
    }
    catch
    {
        $open = $false
    }
    $open
}

您可以通过尝试自己先读取或锁定文件来查看文件是否被锁定。

请在这里查看我的回答以了解更多信息。

在Powershell中也是一样

function Test-FileOpen
{
    Param
    ([string]$FileToOpen)
    try
    {
        $openFile =([system.io.file]::Open($FileToOpen,[system.io.filemode]::Open))
        $open =$true
        $openFile.close()
    }
    catch
    {
        $open = $false
    }
    $open
}

当我遇到类似的问题时，我完成了以下代码:

public class FileManager
{
    private string _fileName;

    private int _numberOfTries;

    private int _timeIntervalBetweenTries;

    private FileStream GetStream(FileAccess fileAccess)
    {
        var tries = 0;
        while (true)
        {
            try
            {
                return File.Open(_fileName, FileMode.Open, fileAccess, Fileshare.None); 
            }
            catch (IOException e)
            {
                if (!IsFileLocked(e))
                    throw;
                if (++tries > _numberOfTries)
                    throw new MyCustomException("The file is locked too long: " + e.Message, e);
                Thread.Sleep(_timeIntervalBetweenTries);
            }
        }
    }

    private static bool IsFileLocked(IOException exception)
    {
        int errorCode = Marshal.GetHRForException(exception) & ((1 << 16) - 1);
        return errorCode == 32 || errorCode == 33;
    }

    // other code

}

下面是DixonD代码的一个变体，它增加了等待文件解锁的秒数，并重试:

public bool IsFileLocked(string filePath, int secondsToWait)
{
    bool isLocked = true;
    int i = 0;

    while (isLocked &&  ((i < secondsToWait) || (secondsToWait == 0)))
    {
        try
        {
            using (File.Open(filePath, FileMode.Open)) { }
            return false;
        }
        catch (IOException e)
        {
            var errorCode = Marshal.GetHRForException(e) & ((1 << 16) - 1);
            isLocked = errorCode == 32 || errorCode == 33;
            i++;

            if (secondsToWait !=0)
                new System.Threading.ManualResetEvent(false).WaitOne(1000);
        }
    }

    return isLocked;
}


if (!IsFileLocked(file, 10))
{
    ...
}
else
{
    throw new Exception(...);
}

我最后做的是:

internal void LoadExternalData() {
    FileStream file;

    if (TryOpenRead("filepath/filename", 5, out file)) {
        using (file)
        using (StreamReader reader = new StreamReader(file)) {
         // do something 
        }
    }
}


internal bool TryOpenRead(string path, int timeout, out FileStream file) {
    bool isLocked = true;
    bool condition = true;

    do {
        try {
            file = File.OpenRead(path);
            return true;
        }
        catch (IOException e) {
            var errorCode = Marshal.GetHRForException(e) & ((1 << 16) - 1);
            isLocked = errorCode == 32 || errorCode == 33;
            condition = (isLocked && timeout > 0);

            if (condition) {
                // we only wait if the file is locked. If the exception is of any other type, there's no point on keep trying. just return false and null;
                timeout--;
                new System.Threading.ManualResetEvent(false).WaitOne(1000);
            }
        }
    }
    while (condition);

    file = null;
    return false;
}