Winforms用户控制自定义事件

Question

有没有办法给用户控件自定义事件，并调用用户控件中的事件。 （我不知道，如果调用是正确的术语）

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


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

而且的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e Steve发布的示例，还有可以简单地传递事件的语法。它类似于创建一个属性：

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

Answer 2

我相信你想要的东西是这样的：

public partial class Sample: UserControl 
{ 
    public event EventHandler TextboxValidated; 

    public Sample() 
    { 
     InitializeComponent(); 
    } 


    private void TextBox_Validated(object sender, EventArgs e) 
    { 
     // invoke UserControl event here 
     if (this.TextboxValidated != null) this.TextboxValidated(sender, e); 
    } 
} 

然后在你的表格上：

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

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