实现方案:
- 重写
WndProc
方法 - 判断
WM_PARENTNOTIFY
消息 判断 WM_DESTROY
消息参数- 执行事件委托方法
Code
#region Raises the Quit event when the browser window is about to be destroyed
/// <summary>
/// Overridden
/// </summary>
/// <param name="m">The <see cref="Message"/> send to this procedure</param>
[PermissionSet(SecurityAction.LinkDemand, Name = "FullTrust")]
protected override void WndProc(ref Message m)
{
if (m.Msg == (int)WindowsMessages.WM_PARENTNOTIFY)
{
//int lp = m.LParam.ToInt32();
int wp = m.WParam.ToInt32();
int X = wp & 0xFFFF;
//int Y = (wp >> 16) & 0xFFFF;
if (X == (int)WindowsMessages.WM_DESTROY)
this.OnQuit();
}
base.WndProc(ref m);
}
/// <summary>
/// A list of all the available window messages
/// </summary>
enum WindowsMessages
{
WM_DESTROY = 0x2,
WM_PARENTNOTIFY = 0x210,
}
/// <summary>
/// Raises the <see cref="Quit"/> event
/// </summary>
protected void OnQuit()
{
EventHandler h = Quit;
if (null != h)
h(this, EventArgs.Empty);
}
/// <summary>
/// Raised when the browser application quits
/// </summary>
/// <remarks>
/// Do not confuse this with DWebBrowserEvents2.Quit That's something else.
/// </remarks>
public event EventHandler Quit;
#endregion
#region Raises the Quit event when the browser window is about to be destroyed
/// <summary>
/// Overridden
/// </summary>
/// <param name="m">The <see cref="Message"/> send to this procedure</param>
[PermissionSet(SecurityAction.LinkDemand, Name = "FullTrust")]
protected override void WndProc(ref Message m)
{
if (m.Msg == (int)WindowsMessages.WM_PARENTNOTIFY)
{
//int lp = m.LParam.ToInt32();
int wp = m.WParam.ToInt32();
int X = wp & 0xFFFF;
//int Y = (wp >> 16) & 0xFFFF;
if (X == (int)WindowsMessages.WM_DESTROY)
this.OnQuit();
}
base.WndProc(ref m);
}
/// <summary>
/// A list of all the available window messages
/// </summary>
enum WindowsMessages
{
WM_DESTROY = 0x2,
WM_PARENTNOTIFY = 0x210,
}
/// <summary>
/// Raises the <see cref="Quit"/> event
/// </summary>
protected void OnQuit()
{
EventHandler h = Quit;
if (null != h)
h(this, EventArgs.Empty);
}
/// <summary>
/// Raised when the browser application quits
/// </summary>
/// <remarks>
/// Do not confuse this with DWebBrowserEvents2.Quit That's something else.
/// </remarks>
public event EventHandler Quit;
#endregion
fer:
Jeroen Landheer |