如何使用PrincipalContext關閉連接到遠程主機？

Question

當我執行此代碼，

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

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

連接到遠程機器被創建。我能夠看到它在cmd.exe中寫入「net use」。

但我不知道如何在關閉我的應用程序之前關閉此連接。

它會在我退出我的應用程序時自動關閉。

這裏是我的方法：

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是IDisposible。您是否嘗試調用Dispose或將您的代碼放入使用塊中？

Answer 2

PrincipalContext和GroupPrincipal實施IDisposable。確保在使用它們之後立即處理它們（當然在嘗試再次連接之前）。這應該消除這個問題。例如。

速記： -

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 
} 

或速記： -

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(); 
}