C#WinFormUpcountertohh:mm:ss

我想寫一個像 OBS Studio 這樣的程式，我想在我的程式中添加一個向上計數器，這意味著當我點擊“開始流”時，它應該從 00:00:00 到 00:00:01 然后到 00:00 啟動向上計數器:02 等等，這樣我就有了“直播時間”，我已經流了多長時間。使用“結束流”按鈕，計時器應該停止并重置。我怎樣才能做到這一點？

我嘗試了不同的東西，但沒有想法。

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

namespace StreamManagement
{
    public partial class MainFormProgram : Form
    {
        public static bool chat_on = true;
        TimeSpan testTime = DateTime.Now.TimeOfDay;
        public MainFormProgram()
        {
            InitializeComponent();
        }

        private void chatOnBtn_Click(object sender, EventArgs e)
        {
            OnLbl.Text = "ON";
            OnLbl.ForeColor = Color.ForestGreen;
            chatOnBtn.BackColor = Color.LightGray;
            chatOffBtn.BackColor = Color.Gray;
        }

        private void chatOffBtn_Click(object sender, EventArgs e)
        {
            OnLbl.Text = "OFF";
            OnLbl.ForeColor = Color.DarkRed;
            chatOffBtn.BackColor = Color.LightGray;
            chatOnBtn.BackColor = Color.Gray;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            OnLbl.Text = "ON";
            OnLbl.ForeColor = Color.ForestGreen;
            EmoteonlyOnOff.Text = "OFF";
            EmoteonlyOnOff.ForeColor = Color.DarkRed;
            SubchatOnOff.Text = "OFF";
            SubchatOnOff.ForeColor = Color.DarkRed;
        }

        private void EmoteOnlyOnBtn_Click(object sender, EventArgs e)
        {
            EmoteonlyOnOff.Text = "ON";
            EmoteonlyOnOff.ForeColor = Color.ForestGreen;
            EmoteOnlyOnBtn.BackColor = Color.FromArgb(112, 147, 252);
            EmoteOnlyOffBtn.BackColor = Color.FromArgb(50, 100, 150);
        }

        private void EmoteOnlyOffBtn_Click(object sender, EventArgs e)
        {
            EmoteonlyOnOff.Text = "OFF";
            EmoteonlyOnOff.ForeColor = Color.DarkRed;
            EmoteOnlyOffBtn.BackColor = Color.FromArgb(112, 147, 252);
            EmoteOnlyOnBtn.BackColor = Color.FromArgb(50, 100, 150);
        }

        private void SubChatOnBtn_Click(object sender, EventArgs e)
        {
            SubchatOnOff.Text = "ON";
            SubchatOnOff.ForeColor = Color.ForestGreen;
            SubChatOnBtn.BackColor = Color.FromArgb(255, 94, 255);
            SubChatOffBtn.BackColor = Color.FromArgb(192, 0, 192);
        }

        private void SubChatOffBtn_Click(object sender, EventArgs e)
        {
            SubchatOnOff.Text = "OFF";
            SubchatOnOff.ForeColor = Color.DarkRed;
            SubChatOffBtn.BackColor = Color.FromArgb(255, 94, 255);
            SubChatOnBtn.BackColor = Color.FromArgb(192, 0, 192);
        }

        private void startstreamBtn_Click(object sender, EventArgs e)
        {
            timerXD.Start();
        }

        private void timerXD_Tick(object sender, EventArgs e)
        {

        }

        private void timerLbl_Click(object sender, EventArgs e)
        {

        }
    }
}

uj5u.com熱心網友回復：

為此，您可以使用命名空間中的Stopwatch類System.Diagnostics。

Stopwatch在您的Form班級中創建一個欄位：

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

    Stopwatch stopwatch = new Stopwatch(); // <-- this one
}

創建一個Label（lblTime例如），我們將Button在您的表單中設定計數時間和一個，它將開始Stopwatch（btnStart例如）：

可選您也可以添加其它Buttons的操作Stopwatch：

將Click處理程式（ButtonStart_Click例如）添加到“開始”按鈕以從那里運行秒表。標記它async以防止Form在Stopwatch運行時凍結：

private async void ButtonStart_Click(object sender, EventArgs e)
{
    stopwatch.Start();

    while (stopwatch.IsRunning)
    {
        lblTime.Text = stopwatch.Elapsed.ToString("hh\\:mm\\:ss");
        await Task.Delay(1000); // Delay between time updates on Form (1 sec)
    }
}

現在您有了“向上計數計時器”。

評論：

1. 使用stopwatch.Reset();以停止計時器和重置測量的時間。
2. 使用stopwatch.Stop();，如果你想停止計時，但要保持meaused時間。類似于“暫停”。

完整Form代碼：

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

    // "Upcount Timer"
    private readonly Stopwatch stopwatch = new Stopwatch();

    private async void ButtonStart_Click(object sender, EventArgs e)
    {
        stopwatch.Start();

        // Disable START button and enable STOP and PAUSE buttons
        btnStart.Enabled = !(btnPause.Enabled = btnStop.Enabled = true);

        while (stopwatch.IsRunning)
        {
            // Update time in Label on Form
            lblTime.Text = stopwatch.Elapsed.ToString("hh\\:mm\\:ss");
            // Delay between next update
            await Task.Delay(1000);
        }
    }
    private void ButtonPause_Click(object sender, EventArgs e)
    {
        // Stop timer, but not reset measured time
        stopwatch.Stop();
        // Enable START button and disable STOP and PAUSE buttons
        btnStart.Enabled = !(btnPause.Enabled = btnStop.Enabled = false);
    }
    private void ButtonStop_Click(object sender, EventArgs e)
    {
        // Stop timer and reset measured time
        stopwatch.Reset();
        
        // Reset time in Label on Form
        lblTime.Text = "00:00:00";
        // or use stopwatch.Elapsed property - after Reset() it would be 00:00:00
        //lblTime.Text = stopwatch.Elapsed.ToString("hh\\:mm\\:ss");
        
        // Enable START button and disable STOP and PAUSE buttons
        btnStart.Enabled = !(btnPause.Enabled = btnStop.Enabled = false);
    }
}

uj5u.com熱心網友回復：

只需將開始時間存盤在 DateTime 中，然后從當前時間中減去該時間即可獲得 TimeSpan。使用該 TimeSpan，您可以呼叫 ToString() 并指定您想要的任何格式。

就像是：

DateTime startDT;

private void Form1_Load(object sender, EventArgs e)
{
    timerXD.Interval = 1000;
    timerXD.Enabled = false;
}
private void startstreamBtn_Click(object sender, EventArgs e)
{
    label1.Text = "00:00:00";
    startDT = DateTime.Now;
    timerXD.Start();
}
private void timerXD_Tick(object sender, EventArgs e)
{
    String elapsed = DateTime.Now.Subtract(startDT).ToString(@"hh\:mm\:ss");
    label1.Text = elapsed; // display elapsed somehow
}

uj5u.com熱心網友回復：

您可以使用一個單獨的任務來完成此操作，當您使用 CancellationToken 單擊按鈕時，該任務會取消您可以在類名正下方放置：

public CancellationTokenSource cancellationTokenSource { get; set; }
    public CancellationToken cancellationToken => this.cancellationTokenSource.Token;

您的計時器任務可能如下所示：

private async Task Timer()
    {
        CancellationToken cancel = this.cancellationToken;
        int s = 0;


        TimeSpan ts = TimeSpan.FromSeconds(s);
        while(!cancel.IsCancellationRequested)
        {
            lbltimer.Text = ts.ToString(@"hh\:mm\:ss");
            await Task.Delay(1000);
            s  ;
            ts = TimeSpan.FromSeconds(s);
        }
    }

現在是按鈕

把它放在你的 StartBtn 函式中

cancellationTokenSource = new();
        Timer();

這在你的 StopBtn 函式中

cancellationTokenSource.Cancel();

標籤：C＃ 视觉工作室 winforms

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