New Post: implementing and ITaskHandlerStatus

The ITaskHanderStatus interface is exposed through the StatusHandler property of TaskHandlerBase. Suppose you had a task that needed to write information to a log file every few seconds and terminate after 100 entries. You would create a Timer instance inside your TaskHandlerBase inherited class and then have a method like the following that would be called when that Timer's Elapsed event was called:

const int maxWrites = 100;
int writeCount = 0;

void timer_Elapsed(object sender, ElapsedEventArgs e)
{
  if (writeCount < maxWrites)
  {
    try
    {
      using (StreamWriter wri = File.AppendText(file))
        wri.WriteLine("Log entry {0}", DateTime.Now);

      this.StatusHandler.UpdateStatus((short)(++writeCount / maxWrites), string.Format("Log file started at {0}", lastWriteTime));
    }
    catch { }
  }

  if (writeCount >= maxWrites)
  {
    timer.Enabled = false;
    writeCount = 0;
    this.StatusHandler.TaskCompleted(0);
  }
}