c# - 如何正确关闭与 WNetCancelConnection2 的连接？

Question

我想在需要时访问共享和取消访问。我使用以下代码:

class Program
{
    const string Share = "\\\\srv\\share";

    static void ListFiles()
    {
        foreach (var dir in Directory.EnumerateDirectories(Share))
            Console.WriteLine(dir);
    }

    static void Main(string[] args)
    {
        using (var connection = new NetworkConnection(Share, new System.Net.NetworkCredential("user", "password")))
            ListFiles();
        ListFiles();
    }
}

第一次 ListFiles() 调用成功。我预计第二次 ListFiles() 调用会失败，但它也会成功。如何正确取消连接？似乎 WNetCancelConnection2 不起作用。

这也说明here .我想知道是否有人可以让它发挥作用。

FIY 这是一个网络连接类:

public class NetworkConnection : IDisposable
{
    string _networkName;

    public NetworkConnection(string networkName,
        NetworkCredential credentials)
    {
        _networkName = networkName;

        var netResource = new NetResource()
        {
            Scope = ResourceScope.GlobalNetwork,
            ResourceType = ResourceType.Disk,
            DisplayType = ResourceDisplaytype.Share,
            RemoteName = networkName
        };

        var userName = string.IsNullOrEmpty(credentials.Domain)
            ? credentials.UserName
            : string.Format(@"{0}\{1}", credentials.Domain, credentials.UserName);

        var result = WNetAddConnection2(
            netResource,
            credentials.Password,
            userName,
            0);

        if (result != 0)
        {
            throw new Win32Exception(result, "Error connecting to remote share");
        }
    }

    ~NetworkConnection()
    {
        Dispose(false);
    }

    public void Dispose()
    {
        Dispose(true);
        GC.SuppressFinalize(this);
    }

    protected virtual void Dispose(bool disposing)
    {
        WNetCancelConnection2(_networkName, 0, true);
    }

    [DllImport("mpr.dll")]
    private static extern int WNetAddConnection2(NetResource netResource,
        string password, string username, int flags);

    [DllImport("mpr.dll")]
    private static extern int WNetCancelConnection2(string name, int flags,
        bool force);
}

[StructLayout(LayoutKind.Sequential)]
public class NetResource
{
    public ResourceScope Scope;
    public ResourceType ResourceType;
    public ResourceDisplaytype DisplayType;
    public int Usage;
    public string LocalName;
    public string RemoteName;
    public string Comment;
    public string Provider;
}

public enum ResourceScope : int
{
    Connected = 1,
    GlobalNetwork,
    Remembered,
    Recent,
    Context
};

public enum ResourceType : int
{
    Any = 0,
    Disk = 1,
    Print = 2,
    Reserved = 8,
}

public enum ResourceDisplaytype : int
{
    Generic = 0x0,
    Domain = 0x01,
    Server = 0x02,
    Share = 0x03,
    File = 0x04,
    Group = 0x05,
    Network = 0x06,
    Root = 0x07,
    Shareadmin = 0x08,
    Directory = 0x09,
    Tree = 0x0a,
    Ndscontainer = 0x0b
}

Answer 1

我遇到了类似的问题。我在代码中等待了 60 秒，然后网络连接才真正关闭。 Paulik 是对的，凭据缓存在某个地方，这使得我与其他凭据的下一次连接失败。但是，如果我使用 WNetCancelConnection2(pathname, flag, false) 关闭并等待 60 秒，我的新凭据将正常工作。不知道原因，但它确实有效。