设置用户控件的默认事件 [英] Set User Control's default event

问题描述

我有一个 User Control ，其中包含一大堆控件。我想将这个 User Control 的默认事件设置为我的一个按钮的点击事件。

I have a User Control containing a bunch of controls. I want to set the default Event of this User Control to the Click event of one of my buttons.

我知道将默认事件设置为其中一个UserControl的事件我应该添加属性：

I know for setting default event to one of the UserControl's events I should add the attribute:

[DefaultEvent("Click")]
public partial class ucPersonSearch : UserControl
...

我想知道是否可以执行以下操作：

I'm wondering if it's possible to do something like:

[DefaultEvent("btn1_Click")]
public partial class ucPersonSearch : UserControl
...

我想在btn1被绑定的时候托管此用户控件的形式发起一些方法。

I want to fire some methods in the form hosting this User Control at the time btn1 is clikced.

这是我项目中的一个编织，你回答将有价值。

This is really a knit in my project, and you're answer will be valueable.

推荐答案

您不能将课程成员的事件公开到课外。其他人如何在 UserControl 点击事件 Button $ C>？你试了吗？这是不可能的，除非你让外部的按钮可以访问，这是不好的（每个人都可以更改所有的属性）。

You can't expose events of your class members to the outside of the class. How can others subscribe to the Click event of a Button inside your UserControl? Did you try it? It's not possible unless you make the button accessible from the outside, which is not good (everybody can change all the properties).

你必须定义一个新的事件，当您想要的活动（点击按钮）发生时，触发您的新活动：

You have to define a new event, and fire your new event when your desired event (clicking on the button) happens:

[DefaultEvent("MyClick")]
public partial class UCPersonSearch : UserControl
{
    Button btnSearch;
    public event EventHandler MyClick;

    public UCPersonSearch()
    {
        btnSearch = new Button();
        //...

        btnSearch.Click += new EventHandler(btnSearch_Click);
    }

    void btnSearch_Click(object sender, EventArgs e)
    {
        OnMyClick();
    }

    protected virtual void OnMyClick()
    {
        var h = MyClick;
        if (h != null)
            h(this, EventArgs.Empty);
    }
}

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