How can i add a method that will count the time the program is running?

Question

Like a digital clock with hours minutes seconds and milliseconds 00:00:00:00 This is a class i have now:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Capture.Hook
{
    public class FramesPerSecond
    {
        int _frames = 0;
        int _lastTickCount = 0;
        float _lastFrameRate = 0;

        public void Frame()
        {
            _frames++;
            if (Math.Abs(Environment.TickCount - _lastTickCount) > 1000)
            {
                _lastFrameRate = (float)_frames * 1000 / Math.Abs(Environment.TickCount - _lastTickCount);
                _lastTickCount = Environment.TickCount;
                _frames = 0;
            }
        }

        public float GetFPS()
        {
            return _lastFrameRate;
        }
    }
}

And i use it like this in another class:

if (this.FPS.GetFPS() >= 1)
                        {
                            font.DrawText(null, String.Format("{0:N0} fps", this.FPS.GetFPS()), 5, 5, SharpDX.Color.Red);
                            font.DrawText(null, String.Format("{0:N0} fps", this.FPS.GetFPS()), 5, 5, SharpDX.Color.Red);
                        }

What i want is that the second line:

font.DrawText(null, String.Format("{0:N0} fps", this.FPS.GetFPS()), 5, 5, SharpDX.Color.Red);

To be display under the first line and will show the time clock. Maybe i can add the method that show the time in this class and not in the FramesPerSecond class.

How can i make the method and how to display it using the font.DrawText ?

What i tried so far in the FramesPerSecond class i added:

static DateTime _startTime = DateTime.Now;

Then added:

public static TimeSpan RunTime
        {
            get
            {
                return DateTime.Now - _startTime;
            }
        }

Then in the other class to use it i added:

string timeRunning = FramesPerSecond.RunTime.ToString("hh:mm:ss:ff");

And i'm getting exception on this line: string timeRunning = FramesPerSecond.RunTime.ToString("hh:mm:ss:ff");

Error: Error in InitialiseHook: System.FormatException: Input string was not in a correct format.
   at System.Globalization.TimeSpanFormat.FormatCustomized(TimeSpan value, String format, DateTimeFormatInfo dtfi)
   at System.Globalization.TimeSpanFormat.Format(TimeSpan value, String format, IFormatProvider formatProvider)
   at System.TimeSpan.ToString(String format)

Answer 1

public class FramesPerSecond
{
    int _frames = 0;
    int _lastTickCount = 0;
    float _lastFrameRate = 0;
    DateTime _startTime = DateTime.Now;

    public Timespan RunTime
    {
        get
        {
             return DateTime.Now - _startTime;
        }
     }

    public void Frame()
    {
        _frames++;
        if (Math.Abs(Environment.TickCount - _lastTickCount) > 1000)
        {
            _lastFrameRate = (float)_frames * 1000 / Math.Abs(Environment.TickCount - _lastTickCount);
            _lastTickCount = Environment.TickCount;
            _frames = 0;
        }
    }

    public float GetFPS()
    {
        return _lastFrameRate;
    }
}

Just add a DateTime and track between calls, to use it, you just need to use something like this:

string timeRunning = FPS.RunTime.ToString(@"hh\:mm\:ss\:ff");

And then draw that out wherever you want.

Answer 2

If you're looking to display a continually updating text with an incremental timer noting time elapsed, the way I've found that works best for me is to add a Timer Windows Form class to your form, start a Stopwatch (using System.Diagnostics), and attach a method to the timer Tick event to update the label or whatever the text for the clock is held in.

// Don't forget the using in your imports and such
using System.Diagnostics;

Stopwatch stopwatch = new Stopwatch();

public void CheckTime()
{
    label1.Text = stopwatch.Elapsed.ToString("hh\\:mm\\:ss\\:ff");
}

public void timer1_Tick(object sender, EventArgs e)
{
    CheckTime();
}

By default, I believe the Timer has an interval of 100. If you want it to update more more frequently than that I'd recommend 10.

timer1.Interval = 10;