Convert timespan to datetime 添加到C#中的datetimepicker

Question

我想在datatimerpicker中显示一个时间跨度数据类型，我必须先转换但我不知道该怎么做

private void button1_Click(object sender, EventArgs e)
{
    TimeSpan a = new TimeSpan(12, 00, 00);
    TimeSpan b = new TimeSpan(13, 00, 00);

    TimeSpan r = b - a;
    TimeSpan rr = new TimeSpan(r.Ticks / 2);

    MessageBox.Show("Test\n " + rr);   ///this is type TimeSpan 

    dateTimePicker.Value =Convert.ToDateTime(rr);   
    // error here
    // Additional Information: An object of type 'System.TimeSpan' 
    // can not be converted to type 'System.IConvertible'. "
}

Answer 1

如果您只想在 DateTimePicker 控件中显示时间，只需将 Format 属性值更改为 Time，但是，如果您正在寻找要使用的控件它作为计数器，我建议你使用 TextBox 或 Label 或其他东西 :)

Answer 2

This may in no way be an answer to your question - take it as just an insight into what you are trying to ask and then we can maybe create a real question/answer for it.

Date/Time 选择器必须有日期组件。但是，我们可以 'ignore' 日期部分..

由于问题的模糊性，我只能推测...但是这里是...我的 "could be's" 最终将如何表达。 ..

TimeSpan a = new TimeSpan(12, 00, 00);       // 12 hours (could be midday)
TimeSpan b = new TimeSpan(13, 00, 00);       // 13 hours (could be 1 pm)

TimeSpan r = b - a;                          // 1 hour (could be 1 am)

TimeSpan rr = new TimeSpan(r.Ticks / 2);     // 30 minutes (could be 12:30 am)

dateTimePicker.Value = DateTime.Now.Add(rr); // current date time plus 30 minutes

// -- OR --

dateTimePicker.Value = DateTime.Now.Date.Add(rr); // current date plus 30 minutes
                                                  // eg: 2017-08-29 00:30:00

我想这是你要找的最后一个，但加上这个...

dateTimePicker.Format = DateTimePickerFormat.Time;

有关详细信息，请参阅此内容：https://msdn.microsoft.com/en-us/library/ms229631(v=vs.100).aspx

Answer 3

尝试：

private void button1_Click(object sender, EventArgs e){
TimeSpan a = new TimeSpan(12, 00, 00);
TimeSpan b = new TimeSpan(13, 00, 00);

TimeSpan r = b - a;
TimeSpan rr = new TimeSpan(r.Ticks / 2);

MessageBox.Show("Test\n " + rr);   ///this is type TimeSpan 

dateTimePicker.Value =  DateTime.Now.Date.AddMilliseconds(rr.TotalMilliseconds);
}

Convert timespan to datetime 添加到C#中的datetimepicker

Convert timespan to datetime To add to a datetimepicker in C #

c#

datetime

datetimepicker

winforms