Winforms 用户控件自定义事件

Winforms user controls custom events(Winforms 用户控件自定义事件)

问题描述

有没有办法给用户控件自定义事件，并在用户控件内的事件上调用事件.(我不确定调用是否是正确的术语)

Is there a way to give a User Control custom events, and invoke the event on a event within the user control. (I'm not sure if invoke is the correct term)

public partial class Sample: UserControl
{
    public Sample()
    {
        InitializeComponent();
    }


    private void TextBox_Validated(object sender, EventArgs e)
    {
        // invoke UserControl event here
    }
}

主窗体:

public partial class MainForm : Form
{
    private Sample sampleUserControl = new Sample();

    public MainForm()
    {
        this.InitializeComponent();
        sampleUserControl.Click += new EventHandler(this.CustomEvent_Handler);
    }
    private void CustomEvent_Handler(object sender, EventArgs e)
    {
        // do stuff
    }
}

推荐答案

除了 Steve 发布的示例之外，还有一些可用的语法可以简单地传递事件.类似于创建属性:

Aside from the example that Steve posted, there is also syntax available which can simply pass the event through. It is similar to creating a property:

class MyUserControl : UserControl
{
   public event EventHandler TextBoxValidated
   {
      add { textBox1.Validated += value; }
      remove { textBox1.Validated -= value; }
   }
}

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