ASPX取用户名 IIS设置：除开启windows验证，其他验证都关闭

    public static string getlogonId()
    {
        string ADAccount = string.Empty;
        if (HttpContext.Current.Request.ServerVariables["LOGON_USER"] != null)   // 
        {
            ADAccount = HttpContext.Current.Request.ServerVariables["LOGON_USER"].ToString().TrimEnd(' ');
            int str = ADAccount.IndexOf("\\");
            ADAccount = ADAccount.Remove(0, (str + 1));
        }
        return ADAccount;
    }