Question

我必须创建winform应用程序，它在文本文件中写入开始时间和停止时间，以便文本文件中的数据可用于在图形中显示。现在我已设法让计时器在文本文件中写入开始和停止时间，但计时器写入完整的持续时间

即; 8/13/2014 8:33:57 PM 8/13/2014 8:33:57 PM 8/13/2014 8:33:58 PM 8/13/2014 8:33:58 PM 8/13/2014 8:33:59 PM 8/13/2014 8:33:59 PM 8/13/2014 8:34:00 PM

但我希望计时器只写开始时间和结束时间。

using System;
using System.Windows.Forms;
using System.IO;
using System.Text;

namespace WindowsFormsApplication3
{
public partial class Form1 : Form
{

    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {

        timer1.Start();

    }


    private void timer1_Tick(object sender, EventArgs e)
    {

      FileStream fs = new FileStream(@"D:\Hello.txt", FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
        //FileStream fs = new FileStream(@"E:\log{0:yyyy-MM-dd HH:mm:ss}.txt", FileMode.Append, FileAccess.Write, FileShare.ReadWrite),sb.ToString());
        StreamWriter sw = new StreamWriter(fs);
        sw.WriteLine(DateTime.Now.Hour);

        lbTimer.Items.Add(DateTime.Now.Hour+"Hours");
        lbTimer1.Items.Add(DateTime.Now.Minute+"M");
        lbTimer2.Items.Add(DateTime.Now.Second+"s");
        fs.Flush();
        sw.Close();
        fs.Close();

    }
}

}

Answer 1

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

    private void Form1_Load(object sender, EventArgs e)
    {
        File.AppendAllText("D:\\Hello.txt", DateTime.Now.ToString());
    }

    private void Form1_FormClosed(object sender, FormClosedEventArgs e)
    {
        File.AppendAllText("D:\\Hello.txt", DateTime.Now.ToString());
    }
}

Answer 2

这可以是一个选项，收集所有日期并写入文件一次：

        string path = @"yourpathhere";
        List<string> dates = new List<string>();

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            dates.Add(DateTime.Now.ToString());
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            dates.Add(DateTime.Now.ToString());
            File.WriteAllText(path, dates.Aggregate((d1, d2) => d1 + "\r\n" + d2));
        }

Answer 3

你可以试试这个......

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

    private void Form1_Load(object sender, EventArgs e)
    {
        using (System.IO.StreamWriter streamWriter = new StreamWriter("Report.txt", false)) 
        {
            streamWriter.WriteLine(string.Format("Start Time : {0:yyyy-MM-dd HH:mm:ss}", DateTime.Now));
        }
    }

    private void Form_Closed(object sender, EventArgs e)
    {
        using (System.IO.StreamWriter streamWriter = new StreamWriter("Report.txt", true)) 
        {
            streamWriter.WriteLine(string.Format("End Time : {0:yyyy-MM-dd HH:mm:ss}", DateTime.Now));
        }
    }
}

定时器如何将应用程序启动时间和应用程序结束时间保存到文本文件中？

3 个答案: