关于Timer的简单问题！

Question

public partial class Form1 : Form
    {
        DateTime time1, time2;
        public Form1()
        {
            InitializeComponent();
        }        private void button1_Click(object sender, EventArgs e)
        {
            time1 = DateTime.Now;
        }        private void button2_Click(object sender, EventArgs e)
        {
            time2 = DateTime.Now;            TimeSpan timeSpan = time2 - time1;            this.listBox1.Items.Add(timeSpan);        }
    }

Answer 1

this.listBox1.Items.Add(timeSpan.TotalMilliseconds);

Answer 2

this.listBox1.Items.Add(timeSpan.TotalMilliseconds);

Answer 3

this.listBox1.Items.Add(timeSpan.TotalMilliseconds);

Answer 4

double i = timer1.Interval;
当然不会变化了,timer1.Interval是隔多久触发一次ontimer事件,
如果要做秒表,这样是不准确的...与interval有关系,误差在 正负interval之间

Answer 5

正解！！！-------------------------------------------
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http://blog.sina.com.cn/PanJinCun

Answer 6

int start=Environment.TickCount;
....int i=Environment.TickCount-start;

Answer 7

public partial class Form1 : Form
    {
        int start;
        public Form1()
        {
            InitializeComponent();
        }        private void button1_Click(object sender, EventArgs e)
        {
            start=Environment.TickCount;
        }        private void button2_Click(object sender, EventArgs e)
        {
            int i=Environment.TickCount-start;            this.listBox1.Items.Add(i.ToString());        }
    }