Windows 窗体 UserControl 中的 C# 按键侦听器
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C# key pressed listener in a Windows Forms UserControl
提问by Zapnologica
Good day,
再会，
I want to add key listeners in a forms user control. Which is included in a main form.
我想在表单用户控件中添加关键侦听器。其中包含在主窗体中。
When a user presses a key in my application I want it to do some thing.
当用户在我的应用程序中按下一个键时，我希望它做一些事情。
How do I go about doing this?
我该怎么做？
for example. If I pressed w then a popup would appear saying you pressed w.
例如。如果我按下 w，则会出现一个弹出窗口，说您按下了 w。
I have tried this in my User Control Class;
我在我的用户控件类中尝试过这个；
private void UC_ControlsTank_KeyPress(object sender, KeyPressEventArgs e)
{
Console.Write("You pressed:" + e.KeyChar);
}
But when i press keys nothing seems to happen.
但是当我按下按键时，似乎什么也没有发生。
EDIT:
编辑：
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
MessageBox.Show(e.KeyChar.ToString());
}
}
Here is my form:
and here is how I linked it in visual studio:
这是我的表格：这是我在 Visual Studio 中链接它的方式：
回答by David Pilkington
There is a KeyPressedevent that you can use
有一个KeyPressed你可以使用的事件
This has System.Windows.Forms.KeyEventArgs ethat will tell you what key was pressed
这System.Windows.Forms.KeyEventArgs e会告诉你按下了什么键
Edit:
编辑：
So I just tried this on a sample app and it worked fine
所以我只是在一个示例应用程序上尝试了这个，它运行良好
private void Form1_KeyPress(object sender, KeyPressEventArgs e)
{
MessageBox.Show(e.KeyChar.ToString());
}
回答by zey
Here is an Example ,
这是一个例子，
private void control_KeyDown(object sender, KeyEventArgs e)
{
switch (e.KeyData)
{
case Keys.W:
{
MessageBox.Show("you pressed w");
break;
}
case Keys.B:
{
MessageBox.Show("you pressed b");
break;
}
case Keys.F11:
{
MessageBox.Show("you pressed F11");
break;
}
case Keys.Escape:
{
this.Close();
break;
}
default:
{
break;
}
}
}
or
或者
Reference this Overriding Keydown in a User Control using ProcessKeyPreview.
回答by Kurubaran
First of all before capturing KeyPress you have to set the KeyPreviewproperty of the Win Form to true. Unless you set it to true KeyPress will not be captured.
首先，在捕获 KeyPress 之前，您必须KeyPreview将 Win Form的属性设置为true. 除非您将其设置为 true，否则不会捕获 KeyPress。
