从 LastBootUpTime 返回奇怪的字符串

Question

我正在 return 使用 System.Management 从 Win32_OperatingSystem 获取值（我知道 Microsoft.Management.Infrastructure 但我只是在做一些测试）。

这就是我运行:

string bootTime = "";
//Creating a management searcher object
ManagementObjectSearcher mgmtObjSearcher = new ManagementObjectSearcher("SELECT LastBootUpTime FROM Win32_OperatingSystem");
//Collection to hold "results"
ManagementObjectCollection objCollection = mgmtObjSearcher.Get();
foreach (ManagementObject mgmtObject in objCollection)
{
    bootTime = mgmtObject["LastBootUpTime"].ToString();
}

但是在尝试运行 Convert.ToDateTime(bootTime).ToString("dd/MM/yyyy hh:mm:ss"); 时出现以下错误：

System.FormatException: 'String was not recognized as a valid DateTime.'

看起来 LastBootUpTime 值被 return 编辑为 20190703085750.500000+060，我似乎无法使用 Convert.ToDateTime 进行转换并且无法使用 DateTime.Parse

有人可以伸出援助之手，让我知道哪里出错了吗？我只想 return LastBootUpTime 并转换特定的字符串格式 ("dd/MM/yyyy hh:mm:ss")。非常感谢任何帮助:)

Answer 1

根据 Ňɏssa Pøngjǣrdenlarp 和 Soner Gönül 的评论，这就是我的结论：

string bootTime = "";
//Creating a management searcher object
ManagementObjectSearcher mgmtObjSearcher = new ManagementObjectSearcher("SELECT LastBootUpTime FROM Win32_OperatingSystem");
//Collection to hold "results"
ManagementObjectCollection objCollection = mgmtObjSearcher.Get();
foreach (ManagementObject mgmtObject in objCollection)
{
    bootTime = ManagementDateTimeConverter.ToDateTime(mgmtObject["LastBootUpTime"].ToString()).ToString("dd/MM/yyyy HH:mm:ss");
}

更新在 infinit_e 评论之后，这是我在不使用 foreach 循环的情况下获取值的方式：

string bootTime = new ManagementObjectSearcher("SELECT LastBootUpTime FROM Win32_OperatingSystem").Get()
    .OfType<ManagementObject>()
    .First()
    .Properties["LastBootUpTime"].Value.ToString();

从 LastBootUpTime 返回奇怪的字符串

Weird String returned from LastBootUpTime

c#

wmi

datetime