Question

我正在尝试创建一个程序，在输入的时间（小时，分钟和秒）后关闭计算机。一切正常，除非它根本不更新richTextBox1。请有人帮忙解决这个问题。提前谢谢。

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

namespace ShutdownPC
{
    public partial class Form1 : Form
    {
        public int inputHours = 0;
        public int inputMinutes = 0;
        public int inputSeconds = 0;
        public int totalSeconds = 0;
        public int totalMilliseconds = 0;
        public int ticks = 0;

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            textBox1.Enabled = false;
            textBox2.Enabled = false;
            textBox3.Enabled = false;
            button1.Enabled = false;

            // Hours
            if (!string.IsNullOrWhiteSpace(textBox1.Text))
            {
                inputHours = int.Parse(textBox1.Text);
            }

            // Minutes
            if (!string.IsNullOrWhiteSpace(textBox2.Text))
            {
                inputMinutes = int.Parse(textBox2.Text);
            }

            // Seconds
            if (!string.IsNullOrWhiteSpace(textBox3.Text))
            {
                inputSeconds = int.Parse(textBox3.Text);
            }

            // Updating richTextBox1 every second with remaining time left
            totalSeconds = (inputHours * 3600) + (inputMinutes * 60) + inputSeconds;
            timer1.Start();
            while (ticks < totalSeconds)
            {
                TimeSpan time = TimeSpan.FromSeconds(totalSeconds);

                string timeOutput = time.ToString(@"hh\:mm\:ss");

                richTextBox1.AppendText(String.Format(timeOutput));
                Thread.Sleep(1000);
                richTextBox1.Clear();
            }


            // Shutting down computer
            totalMilliseconds = ((inputHours * 3600) + (inputMinutes * 60) + inputSeconds) * 1000;
            Thread.Sleep(totalMilliseconds);
            richTextBox1.AppendText("end");
            //Process.Start("shutdown", "/s /t 0");
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            ticks++;
        }
    }
}

Answer 1

正如SLaks所说，如果您阻止UI线程，该框将永远不会更新，但在.net中您有等待/异步，只需将您的方法转换为private async void button1_Click而不是Thread.Sleep使用{ {1}}。

另外，您可以使用

设置框内容

await Task.Delay

这应该是

TimeSpan time = TimeSpan.FromSeconds(totalSeconds);
richTextBox1.AppendText(String.Format(timeOutput));

如果你想要倒计时。

无法获得richTextBox1进行更新

1 个答案: