如何使用PrincipalContext关闭到远程主机的连接

本文关键字：主机 连接 程主机 PrincipalContext 何使用 | 更新日期: 2023-09-27 18:10:57

当我执行这段代码时，

PrincipalContext oPrincipalContext = new PrincipalContext(
    ContextType.Machine, 
    computer.Name, 
    null,
    ContextOptions.Negotiate,
    Settings.UserName, 
    Settings.UserPassword))
GroupPrincipal oGroupPrincipal = GroupPrincipal.FindByIdentity(
    oPrincipalContext, 
    Settings.AdministratorsGroup);

创建到远程计算机的连接。我可以看到它在cmd.exe中写"net use"。

但是我不知道在关闭我的应用程序之前如何关闭这个连接。

当我退出应用程序时，它会自动关闭。

方法如下:

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;
}

如何使用PrincipalContext关闭到远程主机的连接

PrincipalContext和GroupPrincipal实现了IDisposable。确保在使用后立即处理掉它们(当然在再次尝试连接之前)。这应该可以解决问题。例如

速记

: - 

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
}

或手写:-

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();
}

PrincipalContext是不可能的。您是否尝试调用Dispose或将代码放在using块中?

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