C# 覆盖 Winforms 中的事件 [英] C# Override an Event in Winforms

问题描述

我需要为 C# winforms 应用程序中的所有文本框添加一个事件.

I need to add an Event for all my Textboxes in a C# winforms app.

我如何覆盖例如 Enter 事件，以便默认情况下所有文本框都具有此事件?提前致谢

How can I override for example, the Enter event so all textboxes will have by default this event ? Thanks in advance

推荐答案

您可以从 TextBox 继承 YourTextBox 并覆盖 OnEnter 方法以提供所有此类文本框的默认行为.然后使用这个控件代替默认的 TextBox 控件:

You can inherit YourTextBox from TextBox and override OnEnter method to provide default behavior for all such textboxes. Then use this control instead of default TextBox controls:

public class YourTextBox : TextBox
{
    protected override void OnEnter(EventArgs e)
    {
        // do something here
        base.OnEnter(e);
    }
}

或者您可以将所有文本框订阅到相同的事件处理程序.您可以手动或以编程方式执行此操作.例如.如果您只对 Form 的顶级文本框感兴趣:

Or you can subscribe all textboxes to same event handler. You can do that either manually, or programmatically. E.g. if you are interested only in top-level textboxes of Form:

foreach (var textBox in Controls.OfType<TextBox>())
     textBox.Enter += YourEventHandler;

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