c# - Winforms 用户控件自定义事件

Question

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该事件。 (我不确定调用是否正确)

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


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

和 MainForm:

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
    }
}

Answer 1

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

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