说我有一个带有许多Button和PictureBox控件的面板。每个控件都有一个关联的Click事件。这是一个触摸屏应用程序，因此用户的点击可能会有点不准确（或者触摸屏校准可能并不完美）。因此，我想处理面板上的click事件，然后如果单击接近按钮/图片，则以编程方式调用Button或PictureBox的Click事件。
许多其他答案建议使用“ PerformClick”事件，但Compact Framework不支持此事件。还有其他选择吗？我的代码：
private void pnlButtons_Click(object sender, EventArgs e)
{
Point ptClick = Control.MousePosition;
foreach (Control cntrl in pnlButtons.Controls)
{
// Make sure the control is visible!
if (cntrl.Visible)
{
// Click close to control?
if ((ptClick.X > (cntrl.Left - 5)) &&
(ptClick.X < (cntrl.Right + 5)) &&
(ptClick.Y > (cntrl.Top - 5)) &&
(ptClick.Y < (cntrl.Bottom + 5)))
{
// Click Button or PictureBox without cntrl.PerformClick?
}
}
}
}
首先，尝试子类化按钮，然后从您自己的PerformClick调用click事件。否则，您可以编写一个使用按钮并单击的方法。首先获取控件的句柄，然后p /调用Windows API函数以向其发送mousedown和mouseup事件。我相信这是SendMessage函数。然后，您要做的就是编写逻辑以找到最接近的按钮，并将其传递给函数。或者，将其作为Button的扩展方法编写
https://msdn.microsoft.com/zh-cn/library/windows/desktop/ms644950%28v=vs.85%29.aspx
编辑：这是通过向控件发送mousedown和mouseup消息来模拟单击的完整代码：
// Windows constants for mouse messages
private const int WM_LBUTTONDOWN = 0x0201;
private const int WM_LBUTTONUP = 0x0202;
// P/Invoke for SendMessage
[DllImport("coredll.dll")]
public static extern IntPtr SendMessage(IntPtr hWnd, int nMsg, IntPtr wParam, IntPtr lParam);
// Method to click a control
public void ClickControl(IntPtr hWnd)
{
// Send a MOUSE_DOWN and MOUSE_UP message to the control to simulate a click
SendMessage(hWnd, WM_LBUTTONDOWN, IntPtr.Zero, IntPtr.Zero);
SendMessage(hWnd, WM_LBUTTONUP, IntPtr.Zero, IntPtr.Zero);
}
// Method to handle click event on parent Panel control
private void pnlButtons_Click(object sender, EventArgs e)
{
// See if the click point is close to a (visible) button and if so, click the button.
// The user was probably a little imprecise or the screen might need re-calibration.
Point pt = pnlButtons.PointToClient(Cursor.Position);
// Now look for any Button / PictureBox controls nearby
foreach (Control cntrl in pnlButtons.Controls)
{
Rectangle inflated = cntrl.Bounds;
inflated.Inflate(4, 5);
if (cntrl.Visible && inflated.Contains(pt))
{
// Simulate a click on the control
ClickControl(cntrl.Handle);
break;
}
}
}
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