将数据从 UserControl 传递到另一个 [英] Passing data from a UserControl to another

问题描述

我有一个表单和两个我自己制作的自定义 UserControl.一个控件有一些按钮，每个按钮的 Tag 属性设置为 PointF 数组.我有另一个 UserControl，它有一个 ObservableCollection<PointF[]>，我将它的事件处理程序设置为在向其中添加数据时绘制线条.如果我将数据点放在它自己的类上，这很好用...只需确保它有效.

I have a form and two custom UserControl that I made myself. one control has some buttons that each of these button have theire Tag property set to an array of PointF. I have another UserControl that has a ObservableCollection<PointF[]> that I set its event handler to draw the lines if data is being added to it. This works fine If I put the data points on its own class...just make to sure it works.

不，我的问题是，将这两个控件放在一个表单中，如何设置第一个控件中按钮的点击事件，将数据点添加到第二个控件?

No my problem is, having this two control in one form, how can I set the click event of buttons in the first control, to add data points to the second control?

在我的解决方案中，这两个控件都在两个不同的项目中.而这些控件显示的形式，也是在不同的项目中(是解决方案的启动项目)

This two controls are both in two different projects in my soloution. and the form that these to controls are being showed in, is also in a different project (it is the launching project of soloution)

推荐答案

向第一个控件添加事件.

Add an event to the first control.

public event EventHandler<EventArgs> Control1ButtonClicked;
private void OnClicked()
{
    var handler = Control1ButtonClicked;
    if (handler != null)
    {
        handler(this, new EventArgs());
    }
}

private void Button1_Click(object sender, EventArgs e)
{
    OnClicked();     
}

给第二个控件添加一个属性

Add a property to the second control

public ObservableCollection<PointF[]> MyPoints{ get; set;};

然后在你的主应用程序中添加一个监听器

Then in your main application add a listener

userControl1.Control1ButtonClicked += new EventHandler<EventArgs>(userControl1_Control1ButtonClicked);

void userControl1_Control1ButtonClicked()
{
    //Do Something to control 2
    userControl2.MyPoints.Add() = //Whatever
}

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