[英]How can I find what Organizational Units a computer is part of? ( Active Directory C# )
[英]How to find what user last logged onto a given computer through Active Directory in C#?
我試圖以編程方式查找誰最后一次登錄到給定計算機以及何時使用C#。 給定計算機名稱作為字符串,我了解了有關Active Directory中的計算機上次登錄時間的獲取方法 。 但是,似乎沒有用於實際登錄的用戶的屬性。為此,我是否需要采取其他方法? 我在網上發現的與此遠程相關的所有內容都在VBScript中,但這必須在C#中完成。
只需從系統注冊表中查詢必要的信息。 以下方法將基於計算機是64位還是32位來設置注冊表視圖-盡管如果您是遠程執行的,則可能需要更改獲取此信息的方法,但是應該更改常規方法相同。
使用您將參數與“注冊表視圖”一起傳遞的計算機的名稱以及“ Registy Hive作為本地計算機”的計算機名稱來選擇基本密鑰。 然后,您打開基本密鑰,最后打開所需的子密鑰,以保留所需的信息。
包含該信息的位置是:
軟件\\ Microsoft \\ Windows \\ CurrentVersion \\ Authentication \\ LogonUI
然后從那里獲取LastLoggedOnUser
的值。
這是C#中的代碼:
private static string GetLastUserLoggedOn(string machineName)
{
string location = @"SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI";
var registryView = Environment.Is64BitOperatingSystem ? RegistryView.Registry64 : RegistryView.Registry32;
using (var hive = RegistryKey.OpenRemoteBaseKey(RegistryHive.LocalMachine, machineName, registryView))
{
using (var key = hive.OpenSubKey(location))
{
var item = key.GetValue("LastLoggedOnUser");
string itemValue = item == null ? "No Logon Found" : item.ToString();
return itemValue;
}
}
}
這是我發現的一些代碼:
using System;
// has DateTime class
using System.Collections.Generic;
// has the Dictionary class
using System.DirectoryServices;
// has all the LDAP classes such as DirectoryEntry
using ActiveDs;
// has the IADsLargeInteger class
// Get the root entry
DirectoryEntry rootDSE = new DirectoryEntry("LDAP://RootDSE");
string configurationNamingContext =
(string)rootDSE.Properties["configurationNamingContext"].Value;
string defaultNamingContext =
(string)rootDSE.Properties["defaultNamingContext"].Value;
// Get all the domain controllers
// Get all the domain controllers
DirectoryEntry deConfig =
new DirectoryEntry("LDAP://" + configurationNamingContext);
DirectorySearcher dsConfig = new DirectorySearcher(deConfig);
dsConfig.Filter = "(objectClass=nTDSDSA)";
foreach (SearchResult srDomains in dsConfig.FindAll())
{
DirectoryEntry deDomain = srDomains.GetDirectoryEntry();
if (deDomain != null)
{
string dnsHostName =
deDomain.Parent.Properties["DNSHostName"].Value.ToString();
// Get all the users for that domain
}
}
// Get all the users for that domain
DirectoryEntry deUsers =
new DirectoryEntry("LDAP://" + dnsHostName + "/" + defaultNamingContext);
DirectorySearcher dsUsers = new DirectorySearcher(deUsers);
dsUsers.Filter = "(&(objectCategory=person)(objectClass=user))";
foreach (SearchResult srUsers in dsUsers.FindAll())
{
DirectoryEntry deUser = srUsers.GetDirectoryEntry();
if (deUser != null)
{
// Get the distinguishedName and lastLogon for each user
// Save the most recent logon for each user in a Dictionary object
}
}
//Create Dictionary
Dictionary<string, Int64> lastLogons = new Dictionary<string, Int64>();
// Get the distinguishedName and lastLogon for each user
string distinguishedName =
deUser.Properties["distinguishedName"].Value.ToString();
Int64 lastLogonThisServer = new Int64();
if (deUser.Properties["lastLogon"].Value != null)
{
IADsLargeInteger lgInt =
(IADsLargeInteger)deUser.Properties["lastLogon"].Value;
lastLogonThisServer = ((long)lgInt.HighPart << 32) + lgInt.LowPart;
}
// Save the most recent logon for each user in a Dictionary object
if (lastLogons.ContainsKey(distinguishedName))
{
if (lastLogons[distinguishedName] < lastLogonThisServer)
{
lastLogons[distinguishedName] = lastLogonThisServer;
}
}
else
{
lastLogons.Add(distinguishedName, lastLogonThisServer);
}
//Get the time
// Convert the long integer to a DateTime value
string readableLastLogon =
DateTime.FromFileTime(lastLogonThisServer).ToString();
這是所有這些代碼的來源網站。 開發人員詳細解釋了代碼。 http://www.codeproject.com/Articles/19181/Find-LastLogon-Across-All-Windows-Domain-Controlle
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