I recently created a form application through the Windows Form Application template in Visual Studio. I think the program was automatically created with multiple threads, putting the UI on one thread and whatever else on the other thread. I didn't put any code in the application to use multithreading.
Regardless I ran into and fixed the error described here. An error was thrown because I accessed a UI object from within the code block below. The issue being that the code was being ran from a different thread than the UI's thread.
What I want to know is the program actually using multiple threads? and if so how do I prevent that from happening. If not, what is happening here?
For reference, the code where I ran into this issue was in the same class that I initialize the form with. The line where I ran into the issue was on the last line in the CheckUp function (which has been altered to allow different thread access). Note: The code is structured to be moved to a console app, so the timer method and some other stuff is less kosher
public partial class Form : System.Windows.Forms.Form
{
public Form() {
InitializeComponent();
System.Timers.Timer actionTimer = new System.Timers.Timer(1000);
actionTimer.Elapsed += actionTimerTick;
actionTimer.AutoReset = true;
actionTimer.Enabled = true;
}
private void actionTimerTick(object sender, EventArgs e) {
CheckUp();
}
public void CheckUp() {
bool onlineStatus = GetOnlineStatus();
string status = (onlineStatus) ? "Online" : "Offline";
statusOutputLabel.Invoke((Action)(() => statusOutputLabel.Text = status ));
}
private static bool GetOnlineStatus() {
/*unrelated*/
}
}
