/// <summary>
/// Resolves a domain.
/// </summary>
/// <param name="domain"> The domain to resolve. </param>
/// <returns>
/// Either the domain name specified by <paramref name="domain" /> or the local domain (<see cref="GetLocalDomain" />)
/// if <paramref name="domain" /> is an empty string or a ".".
/// </returns>
/// <exception cref="ArgumentNullException"> <paramref name="domain" /> is null. </exception>
public static string ResolveDomain(string domain)
{
if (domain == null)
{
throw new ArgumentNullException(nameof(domain));
}
if (string.IsNullOrWhiteSpace(domain) ||
string.Equals(domain.Trim(), ".", StringComparison.InvariantCultureIgnoreCase))
{
return(WindowsUser.GetLocalDomain());
}
return(domain);
}
/// <summary>
/// Gets the logon domain, or the domain the local computer has joined respectively.
/// </summary>
/// <returns>
/// The domain the local computer has joined.
/// </returns>
public static string GetNetworkDomain()
{
using (ManagementObject mgmtObj =
new ManagementObject("Win32_ComputerSystem.Name='" + WindowsUser.GetLocalDomain() + "'"))
{
mgmtObj.Get();
string networkDomain = mgmtObj["domain"]
.ToString();
if (string.IsNullOrWhiteSpace(networkDomain) ||
string.Equals(networkDomain.Trim(), ".", StringComparison.InvariantCultureIgnoreCase))
{
networkDomain = WindowsUser.GetLocalDomain();
}
return(networkDomain);
}
}
/// <summary>
/// Extracts domain and user name from logon information.
/// </summary>
/// <param name="logon"> The logon information (either user or domain\user). </param>
/// <param name="resolveDomain"> Specifies whether the extracted domain should be resolved. </param>
/// <param name="resolveUser"> Specifies whether the extracted user should be resolved. </param>
/// <param name="domain"> The extracted domain. Null if no domain information is available. </param>
/// <param name="user"> The extracted user name. Null if no user information is available. </param>
/// <exception cref="ArgumentNullException"> <paramref name="logon" /> is null. </exception>
/// <exception cref="ArgumentException"> <paramref name="logon" /> is an empty string. </exception>
public static void ExtractDomainAndUser(string logon, bool resolveDomain, bool resolveUser, out string domain, out string user)
{
if (logon == null)
{
throw new ArgumentNullException(nameof(logon));
}
if (string.IsNullOrWhiteSpace(logon))
{
throw new ArgumentException("The string is empty.", nameof(logon));
}
int index = logon.IndexOf('\\');
if (index == -1)
{
domain = null;
user = logon;
}
else
{
if (index == 0)
{
domain = null;
}
else
{
domain = logon.Substring(0, index);
}
if (index >= (logon.Length - 1))
{
user = null;
}
else
{
user = logon.Substring(index + 1);
}
}
user ??= string.Empty;
domain ??= string.Empty;
if (resolveUser)
{
if (string.IsNullOrWhiteSpace(user) ||
string.Equals(user.Trim(), ".", StringComparison.InvariantCultureIgnoreCase))
{
user = WindowsUser.GetCurrentUser();
}
}
if (resolveDomain)
{
if (string.IsNullOrWhiteSpace(domain) ||
string.Equals(domain.Trim(), ".", StringComparison.InvariantCultureIgnoreCase))
{
domain = WindowsUser.GetLocalDomain();
}
}
}
