如何将 TimeSpan 值的总和显示为 hh:mm:ss 格式的文本框

Question

I'm converting user-entered textBox values to TimeSpan and adding all TimeSpan values to get a "total amount of time" if you will. I then need to display that total to another textBox in hh:mm:ss format.

Right now I have it so that is adds all the values correctly, however it just returns the TotalHours value to the string instead of hh:mm:ss format.

    private void calculate_btn_Click(object sender, EventArgs e)
    {

        TimeSpan d1 = TimeSpan.Parse(textBox1.Text);
        TimeSpan d2 = TimeSpan.Parse(textBox2.Text);
        TimeSpan d3 = TimeSpan.Parse(textBox3.Text);

        TimeSpan total = d1 + d2 + d3;

        totaltimebox.Text = (total.TotalHours).ToString();

    }

User enters 00:10:00 and 00:09:00.

I expect the output to be 00:19:00, but the current output is 19.

Answer 1

Try totaltimebox.Text= $"{total.Hours}:{total.Minutes}:{total.Seconds}"; .

It looks like what you are doing is returning the total hours, what you want to do it get the hours, minutes and seconds and singular values from the time span.

Say you had a TimeSpan of 2 days, 2 hours, 20 minutes and 10 seconds, the return value of total.TotalHours would = 50. Whereas you actually want the individual components (the hours, the minutes and the seconds) and so using total.Hours would return 2. I hope this helps.