1. Specify the message to pop up and the timing time (in seconds).
2. After the pop-up, the OK button on the dialog box will dynamically count down, and it will automatically close when the time is 0, or you can click the OK button to close it.
Core code:
? Public? Part? Class? TimingMessageBox？ :? form
{
//? Time limit for automatic shutdown, for example, 3 means automatic shutdown after 3 seconds.
Private? int？ Second;
//? A counter used to determine the duration after the current window pops up.
Private? int？ Counter;
//? constructors
Public? TimingMessageBox (string? News? int？ Second)
{
initialize component()；
//? Display message
this.labelMessage.Text？ =? News;
//? Acquisition time limit
This, the second one? =? Second;
//? Initialization counter
This counter? =? 0;
//? The text of the initialization button
this.buttonOK.Text？ =? String. Format ("OK ({0})"，？ This, the second one? -? this . counter)；
//? Activate and start the timer, and set the trigger interval of the timer to 1000ms (1s).
this.timer 1。 Enable? =? True;
this.timer 1。 Interval? =? 1000;
this.timer 1。 start()；
}
Private? Invalid? Timer 1_Tick (object? Sender? EventArgs？ e)
{
//? If the specified time limit is not reached
What if? (this.counter？ & lt=? This second)
{
//? Refresh the text of the button
this.buttonOK.Text？ =? String. Format ("OK ({0})"，？ This, the second one? -? this . counter)；
This. Refresh ();
//? Counter self-increment
this . counter++；
}
//? If the time limit is reached
other
{
//? Turn off the timer
this.timer 1。 Enable? =? Fake;
this.timer 1。 stop()；
//? Close the dialog box
This. close()；
}
}
Private? Invalid? ButtonOK_Click (object? Sender? EventArgs？ e)
{
//? Click the OK button to close the dialog box.
This. close()；
}
} and then call in the main form:
Public? Part? Class? Form 1？ :? form
{
Public? Form 1 ()
{
initialize component()；
}
Private? Invalid? ButtonShowMessageBox_Click (object? Sender? EventArgs？ e)
{
String? Leave a message =? this . textbox message . text . trim()；
int？ Second? =? Conversion. toint 32(this . textbox second . text . trim())；
TimingMessageBox？ messageBox=new？ TimingMessageBox (message, seconds);
messageBox。 ShowDialog()；
}
}