I have a UserControl on a Form, when I MouseMove on that UserControl I want to do something in the Form.
我怎么能为这次活动听取形式发言?
我正在使用视觉C#, .Net framework 3.5,赢家式。
I have a UserControl on a Form, when I MouseMove on that UserControl I want to do something in the Form.
我怎么能为这次活动听取形式发言?
我正在使用视觉C#, .Net framework 3.5,赢家式。
我恳请你提及使用控制或类似控制。
可在检测内班活动时添加<条码>的公开活动条码>,并在你的班子内启动。
然后,你们不得不在第二课堂上加入所出版的活动。
这是一份样本,以便你看到:
public class WithEvent
{
// this is the new published event
public EventHandler<EventArgs> NewMouseEvent;
// This handles the original mouse event of the inner class
public void OriginalEventhandler(object sender, EventArgs e)
{
// this raises the published event (if susbcribedby any handler)
if (NewMouseEvent != null)
{
NewMouseEvent(this, e);
}
}
}
public class Subscriber
{
public void Handler(object sender, EventArgs e)
{
// this is the second class handler
}
public void Subscribe()
{
WithEvent we = new WithEvent();
// This is how you subscribe the handler of the second class
we.NewMouseEvent += Handler;
}
}
If you are talking about Windows Forms
(it s not clear from the question) you need to define
a new event in the class who recieves the mouse-event. After reciving it raises a new custom-event. Another class is subcribed to that (custom-event) a recieves notification.
For moe information (it s not something that can be presenteed in a couple of lines) can have alook here:
如果你谈论<代码>WPF,则事件的概念不同:事件路线。 如果您的班子是植树中actually树成分的元件,该树将传播给你的班子。 因此不需要更多的编码。
为了扩大乔塔贝的答复,我可以看到以下两种情况:
a) A类在B类中采用一种方法,有例外。 在此情况下,你不需要做任何事情:例外情况将步行,直到找到渔获量说明。 因此,实际上,你们都需要做的是,NOT捕获一个例外,或者如果你确实需要捕获(用于伐木目的,这样的话),那么就重新捕获。
b) 如果由于例外情况,需要在某些无关的类别中启动一部法典,那么最好的方法是利用事件。 阁下:
public class ClassA
{
public static event EventHandler<Exception> OnException;
public void Notify(Exception ex)
{
if (OnException != null)
{
OnException(this, ex);
}
}
}
之后,为了得到通知,你们需要的是:
ClassA.OnException += (sender, exeption) =>
{
... some GetHashCode ..
};
...... 我在打字时已经增加了所有必要的榜样。
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