Countdown timer into text c#

Questions & Answers
1

I have a game that refills energy after one hour. i managed to make the energy fills every hour by storing the Datatime.Now into a PlayerPrefs.SetString() and retriving it later on as a long. What i’m tying to do now is to show the remaining time till the next refill on a text by converting long to string. The problem now is that it cuts the time and the seconds counter is set to 100. how can i make it show as a normal countdown timer? or is there any better way to do this?

long temp1 = Convert.ToInt64(PlayerPrefs.GetString("Current Time"));
long temp = Convert.ToInt64(PlayerPrefs.GetString("End Time"));

long counter = (temp - temp1) / 10000000;
TimeSpan timeSpan = TimeSpan.FromSeconds(3600);
string timeText = string.Format("{0:D2}:{1:D2}", timeSpan.Minutes, timeSpan.Seconds);
countdown.text = counter.ToString(timeText);

Note that i’m a beginner. Thanks in advance.

2

timeText is built independently of your counter. You throw in timeSpan.Minutes and timeSpan.Seconds which always will be 0 and 0 because you throw in the constant value of 3600.
The minutes of a TimeSpan don’t include the hours that are accessible in TimeSpan.Hours.
Thus, timeText will always be 00:00.
So this code

TimeSpan timeSpan = TimeSpan.FromSeconds(3600);
string timeText = string.Format("{0:D2}:{1:D2}", timeSpan.Minutes, timeSpan.Seconds);

is equivalent to this code

string timeText = "00:00";

Throwing in timeText as a parameter for your ToString will do weird things. I think this example will clarify a bit:

print(12345678L.ToString("00:00"));

This will print 123456:78 into your console.

So let’s wrap this up from the beginning. You have two longs, a start time and an end time. I assume they’re in milliseconds. So you subtract them from one another (try to use more verbose variable names):

long elapsedTime = endTime - startTime;

Then, you make seconds out of it by dividing by 1,000:

elapsedTime /= 1000;

The fact that this is integer division should not matter since rounding down to the nearest second is okay.

Then, you split this into minutes and seconds:

var elapsedMinutes = elapsedTime / 60;
var elapsedSeconds = elapsedTime % 60; // Modulo calculates the remainder of an integer division

Here, integer division is actually vital.

Now, you can create a proper string with the proper values:

string timeText = string.Format("{0:D2}:{1:D2}", elapsedMinutes, elapsedSeconds);

This string can then directly be displayed:

countdown.text = timeText;