Question

当我执行此代码时，

PrincipalContext oPrincipalContext = new PrincipalContext(
    ContextType.Machine, 
    computer.Name, 
    null,
    ContextOptions.Negotiate,
    Settings.UserName, 
    Settings.UserPassword))

GroupPrincipal oGroupPrincipal = GroupPrincipal.FindByIdentity(
    oPrincipalContext, 
    Settings.AdministratorsGroup);

创建与远程计算机的连接。我能够看到它在cmd.exe中编写“net use”。

但在关闭我的应用程序之前，我不知道如何关闭此连接。

退出我的应用时会自动关闭。

这是我的方法：

public Dictionary<Principal, ComputerPrincipal>
GetMembersOfAdministratorsGroup(ComputerPrincipal computer)
{
    var usersList = new Dictionary<Principal, ComputerPrincipal>();
    var tempUsersList = new Dictionary<string, Principal>();

    using (PrincipalContext oPrincipalContext = 
        new PrincipalContext(
            ContextType.Machine, 
            computer.Name, 
            null,
            ContextOptions.Negotiate,
            Settings.UserName, 
            Settings.UserPassword))
    {
        using (GroupPrincipal oGroupPrincipal =
            GroupPrincipal.FindByIdentity(
                oPrincipalContext, 
                Settings.AdministratorsGroup))
        {
            if (oGroupPrincipal != null)
            {
                var result = oGroupPrincipal.GetMembers();
                foreach (Principal user in result)
                {
                    if (!tempUsersList.ContainsKey(user.Name))
                    {
                        tempUsersList.Add(user.Name, user);
                        usersList.Add(user, computer);
                    }
                }
            }
        }
    }
    return usersList;
}

Answer 1

PrincipalContext和GroupPrincipal都实施IDisposable。确保在使用它们之后立即将它们丢弃（当然在再次尝试连接之前）。这应该可以解决问题。 E.g。

简写： -

using(PrincipalContext oPrincipalContext = new PrincipalContext(ContextType.Machine, computer.Name, null, ContextOptions.Negotiate, Settings.UserName, Settings.UserPassword))
using(GroupPrincipal oGroupPrincipal = GroupPrincipal.FindByIdentity(oPrincipalContext, Settings.AdministratorsGroup))
{
    // perform operations here
}

或以长手： -

PrincipalContext oPrincipalContext = new PrincipalContext(ContextType.Machine, computer.Name, null, ContextOptions.Negotiate, Settings.UserName, Settings.UserPassword);
try
{
    GroupPrincipal oGroupPrincipal = GroupPrincipal.FindByIdentity(oPrincipalContext, Settings.AdministratorsGroup);
    try
    {
        // perform operations here
    }
    finally
    {
        oGroupPrincipal.Dispose();
    }
}
finally
{
    oPrincipalContext.Dispose();
}

Answer 2

PrincipalContext是IDisposible。您是否尝试过调用Dispose或将代码放入使用块？

如何使用PrincipalContext关闭到远程主机的连接？

2 个答案: