下面是代码(但不是c#):

Private m_CurUser As String

Public ReadOnly Property CurrentUser As String
    Get
        If String.IsNullOrEmpty(m_CurUser) Then
            Dim who As System.Security.Principal.IIdentity = System.Security.Principal.WindowsIdentity.GetCurrent()

            If who Is Nothing Then
                m_CurUser = Environment.UserDomainName & "\" & Environment.UserName
            Else
                m_CurUser = who.Name
            End If
        End If
        Return m_CurUser
    End Get
End Property

下面是代码(现在也是c#):

private string m_CurUser;

public string CurrentUser
{
    get
    {
        if(string.IsNullOrEmpty(m_CurUser))
        {
            var who = System.Security.Principal.WindowsIdentity.GetCurrent();
            if (who == null)
                m_CurUser = System.Environment.UserDomainName + @"\" + System.Environment.UserName;
            else
                m_CurUser = who.Name;
        }
        return m_CurUser;
    }
}

试试这个

ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT UserName FROM Win32_ComputerSystem");
ManagementObjectCollection collection = searcher.Get();
string username = (string)collection.Cast<ManagementBaseObject>().First()["UserName"];

现在看起来好多了

为了对其他人有帮助，当我将一个应用程序从c#.net 3.5 app升级到Visual Studio 2017时，这行代码User.Identity.Name.Substring(4);抛出这个错误“startIndex不能大于字符串长度”(它之前没有阻止)。

当我把它改成system . security . principal . windowidentity . getcurrent()时，它很高兴。但是我最终使用了Environment.UserName;来获取登录的Windows用户，并且没有域部分。

我看了这里的大部分答案，没有一个给我正确的用户名。

在我的情况下，我想获得登录用户名，同时运行我的应用程序从不同的用户，就像shift+右键单击文件和“作为不同的用户运行”。

我尝试的答案给了我“其他”用户名。

这篇博文提供了一种获取登录用户名的方法，即使在我的场景中也能工作: https://smbadiwe.github.io/post/track-activities-windows-service/

它使用Wtsapi

编辑:博客文章中的基本代码，以防它消失

将此代码添加到从ServiceBase继承的类中

[DllImport("Wtsapi32.dll")]
private static extern bool WTSQuerySessionInformation(IntPtr hServer, int sessionId, WtsInfoClass wtsInfoClass, out IntPtr ppBuffer, out int pBytesReturned);
[DllImport("Wtsapi32.dll")]
private static extern void WTSFreeMemory(IntPtr pointer);
 
private enum WtsInfoClass
{
    WTSUserName = 5, 
    WTSDomainName = 7,
}
 
private static string GetUsername(int sessionId, bool prependDomain = true)
{
    IntPtr buffer;
    int strLen;
    string username = "SYSTEM";
    if (WTSQuerySessionInformation(IntPtr.Zero, sessionId, WtsInfoClass.WTSUserName, out buffer, out strLen) && strLen > 1)
    {
        username = Marshal.PtrToStringAnsi(buffer);
        WTSFreeMemory(buffer);
        if (prependDomain)
        {
            if (WTSQuerySessionInformation(IntPtr.Zero, sessionId, WtsInfoClass.WTSDomainName, out buffer, out strLen) && strLen > 1)
            {
                username = Marshal.PtrToStringAnsi(buffer) + "\\" + username;
                WTSFreeMemory(buffer);
            }
        }
    }
    return username;
}

如果你还没有，给类添加一个构造函数;并添加这一行:

CanHandleSessionChangeEvent = true;

编辑: 每个评论请求，这是我如何获得会话ID -这是活动控制台会话ID:

[DllImport("kernel32.dll")]
private static extern uint WTSGetActiveConsoleSessionId();

var activeSessionId = WTSGetActiveConsoleSessionId();
if (activeSessionId == INVALID_SESSION_ID) //failed
{
    logger.WriteLog("No session attached to console!");    
}

使用实际登录用户的System.Windows.Forms.SystemInformation.UserName作为环境。UserName仍然返回当前进程正在使用的帐户。

下面是代码(但不是c#):

Private m_CurUser As String

Public ReadOnly Property CurrentUser As String
    Get
        If String.IsNullOrEmpty(m_CurUser) Then
            Dim who As System.Security.Principal.IIdentity = System.Security.Principal.WindowsIdentity.GetCurrent()

            If who Is Nothing Then
                m_CurUser = Environment.UserDomainName & "\" & Environment.UserName
            Else
                m_CurUser = who.Name
            End If
        End If
        Return m_CurUser
    End Get
End Property

下面是代码(现在也是c#):

private string m_CurUser;

public string CurrentUser
{
    get
    {
        if(string.IsNullOrEmpty(m_CurUser))
        {
            var who = System.Security.Principal.WindowsIdentity.GetCurrent();
            if (who == null)
                m_CurUser = System.Environment.UserDomainName + @"\" + System.Environment.UserName;
            else
                m_CurUser = who.Name;
        }
        return m_CurUser;
    }
}