سلام
public partial class Form1 : Form
{
Timer leftTimer = new Timer();
public Form1()
{
InitializeComponent();
}
private void left_timer_Tick(object sender, EventArgs e)
{
leftTimer.Stop();
System.Windows.Forms.MessageBox.Show("زمان مشخص");
}
private void button1_Click(object sender, EventArgs e)
{
DateTime time;
if (DateTime.TryParse(textBox1.Text, out time) == false){
System.Windows.Forms.MessageBox.Show("خطا");
}
else{
leftTimer.Tick += new EventHandler(left_timer_Tick);
leftTimer.Interval = (int)(time - DateTime.Now).TotalMilliseconds;
leftTimer.Start();
}
}
}