C# 如何在 DateTimePicker 中设置当前时间
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How to set the current time in a DateTimePicker
提问by georgeliatsos
I am trying to set the current time to a DateTimePicker (with Format Time) like
我正在尝试将当前时间设置为 DateTimePicker（带格式时间），例如
this.myDateTimePicker.Value = DateTime.Now;
but when executing my code I am getting an exception
但是在执行我的代码时出现异常
Object reference not set to an instance of an object
What I am doing wrong?
我做错了什么？
Thanks.
谢谢。
采纳答案by code4life
You need to put that code after the InitializeComponent()call is made. There is no instance of myDateTimePickeruntil that point.
您需要在InitializeComponent()调用后放置该代码。在myDateTimePicker那之前没有实例。
回答by phadaphunk
Declare your DateTimePickerand try it.
声明DateTimePicker并尝试一下。
DateTimePicker myPicker = new DateTimePicker;myPicker.Value = DateTime.Now;
DateTimePicker myPicker = new DateTimePicker;myPicker.Value = DateTime.Now;
Like someone pointed out, put your code before the InitializeComponent()since it's in that part that your DateTimePickergets initialized.
就像有人指出的那样，把你的代码放在你的代码之前，InitializeComponent()因为它在你DateTimePicker被初始化的那部分。
1 - Delete you control
2 - Re-add it.
3 - Watch where you put your code.
1 - 删除您的控制
2 - 重新添加它。
3 - 注意你把代码放在哪里。
Should work after that since your doing it right on the code part.
在那之后应该可以工作，因为您在代码部分做得对。
回答by Bianca Kalman
If you use WPF, not WinForms, add this reference:
如果您使用 WPF，而不是 WinForms，请添加以下参考：
xmlns:sys="clr-namespace:System;assembly=mscorlib"
Then in XAML DatePicker's code add:
然后在 XAML DatePicker 的代码中添加：
SelectedDate="{x:Static sys:DateTime.Now}"
