Use a other Method in a static method

Question

How can I use the method ChangeText in my static method timer_Elapsed?

public Load()
{
    InitializeComponent();

    System.Timers.Timer timer = new System.Timers.Timer();
    timer.Interval = 1000;

    // I can't transfer parameters here
    timer.Elapsed += new ElapsedEventHandler(timer_Elapsed); 
    timer.Start();
}

static void timer_Elapsed(object sender, ElapsedEventArgs e)
{
    //Its underlined in red. I need a object reference?
    ChangeText(); 
}

public void ChangeText()
{
    label1.Text = label1.Text + ".";
}

Answer 1

As first, your method (timer_Elapsed) could not me static, in order to use an instance property (label1)

There is an other problem in your code: Timer create an other thread, an most of windows control properties can be modified only by UI thread. Your code will throw a CrossThreadException. In order to resolve your problem , you should modify your code with this:

if(this.InvokeRequired) {
   BeginInvoke(
       new MethodInvoker(delegate { label.Text+="."; }));
} else {
    label.Text+="."; 
}

Regards