Get time Difference in Minutes

Question

I have two buttons in my Application "Start" and "Stop".

When a user clicks on the Start button, LabelStartTime.Text contains current System time(HH:MM AM/PM).

When a user clicks on the Stop Button LabelStopTime.Text contains current System time and LabelTotle.Text

I am trying to show the Time difference in Minutes. I only know how to get current time to the Label value.

lblCurrentTime.Text = DateTime.Now.ToShortTimeString(); // Get current time

        private void button1_Click(object sender, EventArgs e)
    {
        lblCurrentTime.Text = DateTime.Now.ToShortTimeString(); // get system time to the  Start time 

        Stopwatch stopWatch = new Stopwatch();
        stopWatch.Start();
    }


    private void button2_Click(object sender, EventArgs e)
    {
        Stopwatch stopWatch = new Stopwatch();
        stopWatch.Stop();

        textBox1.Text = DateTime.Now.ToShortTimeString();
        lblCurrentPrice.Text = Stopwatch.Elapsed.TotalMinutes; 



    }

this -- > Stopwatch.Elapsed.TotalMinutes Given Error

Answer 1

Consider using the System.Diagnostics.Stopwatch class. Call Start() when the first button is clicked, and Stop() when the second button is clicked. Then, the difference in minutes is Stopwatch.Elapsed.TotalMinutes;

In the code example you've now given you've declared two new stopwatches that only exist within the scope of each method.

Declare it outside the methods like this:

Stopwatch stopWatch = new Stopwatch();

private void button1_Click(object sender, EventArgs e)
{
    // get system time to the  Start time 
    lblCurrentTime.Text = DateTime.Now.ToShortTimeString(); 

    stopWatch.Start();
}

private void button2_Click(object sender, EventArgs e)
{
    stopWatch.Stop();

    textBox1.Text = DateTime.Now.ToShortTimeString();
    lblCurrentPrice.Text = Stopwatch.Elapsed.TotalMinutes; 
}