我是新的 c#,我正在使用下面的代码,但该代码不适用于 Enter 键和 Tab 键。请解决这个问题...
private void Panel_Load(object sender, EventArgs e)
{
this.KeyDown += new KeyEventHandler(C_event);
}
private void C_event(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
Label1.Text = "Enter Key";
return;
}
if (e.keyCode == Keys.Tab)
{
Label1.text = "Tab Key";
return;
}
label1.text = "Default";
}
为了能够处理 Enter/Tab 键按下,您应该重写 ProcessCmdKey 方法
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
if (!this.ProcessKey(msg, keyData))
{
return base.ProcessCmdKey(ref msg, keyData);
}
return false;
}
protected virtual bool ProcessKey(Message msg,Keys keyData)
{
//The condition needs to be either `if ((keyData & Keys.Enter) == keyData)` or `if (keyData == Keys.Enter)`.
if ((keyData & Keys.Enter) == Keys.Enter)
{
Label1.Text = "Enter Key";
return true;
}
if ((keyData & Keys.Tab) == Keys.Tab)
{
Label1.Text = "Tab Key";
return true;
}
return false;
}
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