如何列出的所有计算机，他们于公元已记录到什么时候？

问题描述

我想检索计算机名称的列表，以及上一次登录到Active Directory中的日期，并在一个DataTable归还。
获得的名字是很容易的，但是当我尝试添加了lastLogon或的lastLogonTimestamp如下图所示，唯一值，我得到的是的lastLogonTimestampSystem._ComObject

I am trying to retrieve a list of Computer Names and the date they were last logged onto from Active Directory and return them in a datatable.Getting the names is easy enough but when I try to add the "lastLogon" or "lastLogonTimestamp" like shown below, the only values I get for the lastLogonTimestamp is "System._ComObject"

public DataTable GetListOfComputers(string domainName)
{
  DirectoryEntry entry = new DirectoryEntry("LDAP://DC=" + domainName + ",DC=com");
  DirectorySearcher search = new DirectorySearcher(entry);
  string query = "(objectclass=computer)";
  search.Filter = query;

  search.PropertiesToLoad.Add("name");
  search.PropertiesToLoad.Add("lastLogonTimestamp");

  SearchResultCollection mySearchResultColl = search.FindAll();

  DataTable results = new DataTable();
  results.Columns.Add("name");
  results.Columns.Add("lastLogonTimestamp");

  foreach (SearchResult sr in mySearchResultColl)
  {
    DataRow dr = results.NewRow();
    DirectoryEntry de = sr.GetDirectoryEntry();
    dr["name"] = de.Properties["Name"].Value;
    dr["lastLogonTimestamp"] = de.Properties["lastLogonTimestamp"].Value;
    results.Rows.Add(dr);
    de.Close();
  }

  return results;
}

如果我使用像LDP工具查询AD我可以看到属性存在并填充数据。
我怎样才能得到这个信息？

If I query AD using a tool like LDP I can see that the property exists and is populated with data.How can I get at this info?

推荐答案

这将会是更容易使用ComputerPrincipal类和PrincipalSearcher从System.DirectoryServices.AccountManagement

It'd be easier to use the ComputerPrincipal class and a PrincipalSearcher from System.DirectoryServices.AccountManagement.

PrincipalContext pc = new PrincipalContext(ContextType.Domain, domainName);
PrincipalSearcher ps = new PrincipalSearcher(new ComputerPrincipal(pc));
PrincipalSearchResult<Principal> psr = ps.FindAll();
foreach (ComputerPrincipal cp in psr)
{
    DataRow dr = results.NewRow();
    dr["name"] = cp.Name;
    dr["lastLogonTimestamp"] = cp.LastLogon;
    results.Rows.Add(dr);
}

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