在C#中设置秒表程序的开始时间 [英] Set start time for Stopwatch program in C#

问题描述

我想编写一个简单的秒表程序，我可以使它与以下代码一起使用

I want to write a simple stopwatch program, I can make it work with the following code

    public Form1()
    {
        InitializeComponent();
    }
    System.Diagnostics.Stopwatch ss = new System.Diagnostics.Stopwatch { };
    private void button1_Click(object sender, EventArgs e)
    {
        if (button1.Text == "Start")
        {
            button1.Text = "Stop";

            ss.Start();
            timer1.Enabled = true;

        }
        else
        {
            button1.Text = "Start";

            ss.Stop();
            timer1.Enabled = false;

        }
    }

    private void timer1_Tick(object sender, EventArgs e)
    {


            int hrs = ss.Elapsed.Hours, mins = ss.Elapsed.Minutes, secs = ss.Elapsed.Seconds;
            label1.Text = hrs + ":";
            if (mins < 10)
                label1.Text += "0" + mins + ":";
            else
                label1.Text += mins + ":";
            if (secs < 10)
                label1.Text += "0" + secs;
            else
                label1.Text += secs;


    }

    private void button2_Click(object sender, EventArgs e)
    {
        ss.Reset();
       button1.Text= "Start";
       timer1.Enabled = true;

    }

现在，我想为此秒表设置自定义开始时间，例如，我希望它不从0:00:00开始计时，而是从0:45:00开始计时我该怎么办，谢谢.

Now I want to set a custom start time for this stopwatch, for example I want it not to begin count up from 0:00:00 but to start with 0:45:00 How can I do it, thank you.

推荐答案

创建 System.TimeSpan 的初始值为45分钟.比在其中添加秒表的值 TimeSpan.Add方法.方便地， Stopwatch.Elapsed 的类型为System.TimeSpan已经.

Create a new instance of System.TimeSpan with the initial value of 45 minutes as per you example. Than add the value of the stopwatch to it TimeSpan.Add Method. Conveniently the Stopwatch.Elapsed is of type System.TimeSpan already.

比使用字符串格式化程序将格式化的时间打印到标签中.我认为其他答案之一已经显示了如何执行此操作.否则，这里有一些有关如何格式化TimeSpan实例的很好的参考TimeSpan.ToString方法(字符串)或使用自定义格式程序.

Than use string formatter to print the formatted time into the label. I think one of the other answers already shows how to do that. Otherwise here are some good references on how to format a TimeSpan instance TimeSpan.ToString Method (String) or using a custom formatter.

var offsetTimeSpan = new System.TimeSpan(0,45,0).Add(ss.Elapsed)

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