“按键"缺少 WinForms 文本框的事件?

quot;KeyPressquot; event for WinForms textbox is missing?(“按键缺少 WinForms 文本框的事件?)

问题描述

我正在尝试在文本框 (WinForm) 中添加KeyPress"事件

I am trying to add an "KeyPress" event in a textbox (WinForm)

this.textBox1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(CheckKeys);

这是在CheckKeys"里面:

and here's inside the 'CheckKeys':

private void CheckKeys(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
    if (e.KeyChar == (char)13)
    {
        // Enter is pressed - do something

    }
}

这里的想法是，一旦文本框处于焦点位置并按下Enter"按钮，就会发生一些事情......

The idea here is that once a textbox is in focus and the 'Enter' button was pressed, something will happen...

但是，我的机器找不到KeyPress"事件.我的代码有问题吗?

However, my machine cannot find the 'KeyPress' event. Is there something wrong with my codes?

更新:

我也尝试使用 KeyDown 而不是 KeyPress:

I also tried putting KeyDown instead of KeyPress:

private void textBox1_KeyDown(object sender, System.Windows.Input.KeyEventArgs e)
{

    if (e.Key == Key.Return)

        // Enter is pressed - do something
    }
}

还是不行……

推荐答案

你正在混合类库，不要在 WPF 项目中使用 Windows 窗体类.让它看起来像这样:

You are mixing class libraries, don't use Windows Forms classes in a WPF project. Make it look like this:

  public partial class Window1 : Window {
    public Window1() {
      InitializeComponent();
      this.textBox1.KeyDown += new KeyEventHandler(textBox1_KeyDown);
    }

    private void textBox1_KeyDown(object sender, KeyEventArgs e) {
      if (e.Key == Key.Enter) {
        MessageBox.Show("Enter!");
        e.Handled = true;
      }
    }
  }

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