C# 为什么 DateTime.Now.TimeOfDay.ToString("HH:mm:ss.ffffff") 抛出 FormatException？
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Why does DateTime.Now.TimeOfDay.ToString("HH:mm:ss.ffffff") throw FormatException?
提问by user1935160
I'm having a similar problem with FormatException being thrown. My code is simply:
我在抛出 FormatException 时遇到了类似的问题。我的代码很简单：
void Orders_OnSubmit()
{
DateTime CurrentTime = DateTime.Now;
rtbAdd( "Submitted on " + CurrentTime.Date.ToString("MM/dd/yyyy") + " at " + CurrentTime.TimeOfDay.ToString("HH:mm:ss.ffffff") );
}
void rtbAdd(String S)
{
DefaultDelegate del = delegate()
{
rtb.AppendText(S + "\n");
};
this.Invoke(del);
}
What's wrong here? Is this a threading issue?
这里有什么问题？这是线程问题吗？
采纳答案by Igby Largeman
There's no need to explicitly access the Date and TimeOfDay properties of the DateTime instance. You can simplify your code like so:
无需显式访问 DateTime 实例的 Date 和 TimeOfDay 属性。您可以像这样简化代码：
rtbAdd(String.Format("Submitted on {0:MM/dd/yyyy} at {0:HH:mm:ss.ffffff}", DateTime.Now));
回答by Alexei Levenkov
TimeOfDayis of type TimeSpanand it has different formatting optionsthan DateTime. You also need to escape the colon (:)
TimeOfDay是类型的TimeSpan，它有不同的格式选项比DateTime。您还需要转义冒号 ( :)
currentTime.TimeOfDay.ToString("hh\:mm\:ss\.ffffff")
Your sample tried to use the "HH"format which is defined for DateTime, but not for TimeSpan.
您的示例尝试使用"HH"为定义DateTime的格式，而不是为TimeSpan。
