为什么DateTime.Now.TimeOfDay.ToString（QUOT; HH：MM：ss.ffffff"）抛出FormatException？ [英] Why does DateTime.Now.TimeOfDay.ToString("HH:mm:ss.ffffff") throw FormatException?

问题描述

我有被抛出了类似的问题FormatException。我的代码很简单：

I'm having a similar problem with FormatException being thrown. My code is simply:

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);
}

什么是错在这里？这是一个线程问题？

What's wrong here? Is this a threading issue?

推荐答案

有没有必要明确地访问日期时间实例的日期和性质的TimeOfDay。您可以简化像你这样的代码：

There's no need to explicitly access the Date and TimeOfDay properties of the DateTime instance. You can simplify your code like so:

rtbAdd(String.Format("Submitted on {0:MM/dd/yyyy} at {0:HH:mm:ss.ffffff}", DateTime.Now));

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