private static DateTime?GetUsersLogonTimestamp(DprCurrentUsers user)
{
if (string.IsNullOrEmpty(user.UserName) || string.IsNullOrEmpty(user.Domain) || Win32.WellKnownSids.ContainsKey(user.Sid))
{
return(null);
}
WmiHelpers.ForEachWithScope(user.ComputerName, @"SELECT * FROM Win32_LogonSession", (obj, scope) => {
try {
var roq = new RelatedObjectQuery(string.Format(@"associators of {{Win32_LogonSession.LogonId='{0}'}} WHERE AssocClass = Win32_LoggedOnUser", WmiHelpers.GetString(obj, @"LogonId")));
using (var searcher = new ManagementObjectSearcher(scope, roq)) {
foreach (var mobObj in searcher.Get( ))
{
Helpers.AssertNotNull(mobObj, @"WMI Error, null value returned.");
var mob = (ManagementObject)mobObj;
var name = WmiHelpers.GetString(mob, @"Name");
var domain = WmiHelpers.GetString(mob, @"Domain");
if (!name.Equals(user.UserName) || !domain.Equals(user.Domain))
{
continue;
}
user.LastLogon = WmiHelpers.GetNullableDate(obj, @"StartTime");
return(false); // Found, stop loop
}
}
} catch (ManagementException ex) {
GlobalLogging.WriteLine(Logging.LogSeverity.Error, @"Error finding last logon on {0} for {1}\{2}\n{3}", user.ComputerName, user.Domain, user.UserName, ex.Message);
}
return(true);
}, false, false);
return(user.LastLogon);
}