[英]Capturing KeyDown and KeyUp events for cursor keys
我想在winfor應用程序中移動一些圖形。 為此,我需要知道是否按下了任何光標鍵。 我試圖覆蓋ProcessCmdKey但沒有成功。
任何提示/想法如何實現這一目標?
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
switch (keyData)
{
case Keys.Left:
// while Left is down
// call this method repeadetdly
buttonGoLeft();
// when key is up stop calling this method
// and check for other keys
return true;
//Other cases
}
}
這可行!
using System.Windows.Forms;
namespace WindowsFormsApplication5
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
KeyPreview = true;
}
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
switch (keyData)
{
case Keys.Left:
// while Left is down
// call this method repeadetdly
MessageBox.Show("its left", Application.ProductName, MessageBoxButtons.OK, MessageBoxIcon.Information);
// when key is up stop calling this method
// and check for other keys
return true;
default:
return false;
}
}
}
}
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