Related to: Close a MessageBox after several seconds.
Scenario:
I need to create a message box or Popup which must be visible for specified time and close automatically after then.
Solution:
There is not inbuilt feature in .net framework to do this. You need to create your custom logic that message box close after a specific time. To do this create a custom message box class which have a timer which close the raised pop message when elapsed time equal to specified time to make it visible to the user.
Here is the custom class:
public class AutoClosingMessageBox {
System.Threading.Timer _timeoutTimer;
string _caption;
AutoClosingMessageBox(string text, string caption, int timeout) {
_caption = caption;
_timeoutTimer = new System.Threading.Timer(OnTimerElapsed,
null, timeout, System.Threading.Timeout.Infinite);
MessageBox.Show(text, caption);
}
public static void Show(string text, string caption, int timeout) {
new AutoClosingMessageBox(text, caption, timeout);
}
void OnTimerElapsed(object state) {
IntPtr mbWnd = FindWindow(null, _caption);
if(mbWnd != IntPtr.Zero)
SendMessage(mbWnd, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
_timeoutTimer.Dispose();
}
const int WM_CLOSE = 0x0010;
[System.Runtime.InteropServices.DllImport("user32.dll", SetLastError = true)]
static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[System.Runtime.InteropServices.DllImport("user32.dll", CharSet = System.Runtime.InteropServices.CharSet.Auto)]
static extern IntPtr SendMessage(IntPtr hWnd, UInt32 Msg, IntPtr wParam, IntPtr lParam);
}
It can be called as below:
AutoClosingMessageBox.Show("Text", "Caption", 1000);