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C#编程记录程序运行时间源代码

程序界面

代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            DateTime timeStart = DateTime.Now;
            Thread th = new Thread
                (
                    () =>
                    {
                        while (true)
                        {
                            TimeSpan sjjg =DateTime.Now-timeStart;
                            Invoke
                            ((MethodInvoker)
                                (()=>
                                {
                                    this.Refresh();                                 
                                    Graphics gr = CreateGraphics();
                                    gr.DrawString("程序已经运行：" + string.Format("{0}日{1}时{2}分{3}秒", sjjg.Days,sjjg.Hours,sjjg.Minutes,sjjg.Seconds), new Font("黑体", 15), Brushes.Blue, new Point(150, 100));
                                }
                                )
                            );
                            Thread.Sleep(1000);
                        }
                    }
                );
            th.IsBackground = true;
            th.Start();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Close();
        }
    }
}

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结语：

学会使用() =>运算表达式，创建图像对象，使用DrawString方法输出字符串，了解线程和委托类型。

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