[C#] ProgressBarをスレッドセーフで処理する方法

partial class MyForm : Form
{
    public MyForm()
    {
        InitializeComponent();
        
        // ProgressBarの初期設定
        progressBar1.Minimum = 0; // 最小値
        progressBar1.Maximum = 100; // 最大値
        progressBar1.Value = 0; // 初期値
    }
}

partial class MyForm : Form
{
    public MyForm()
    {
        InitializeComponent();
    }
    private void UpdateProgressBar(int value)
    {
        if (progressBar1.InvokeRequired) // UIスレッドでない場合
        {
            progressBar1.Invoke(new Action<int>(UpdateProgressBar), value);
        }
        else
        {
            progressBar1.Value = value; // ProgressBarの値を更新
        }
    }
}

partial class MyForm : Form
{
    public MyForm()
    {
        InitializeComponent();
    }
    private void UpdateProgressBar(int value)
    {
        if (progressBar1.InvokeRequired) // UIスレッドでない場合
        {
            progressBar1.BeginInvoke(new Action<int>(UpdateProgressBar), value);
        }
        else
        {
            progressBar1.Value = value; // ProgressBarの値を更新
        }
    }
}

partial class MyForm : Form
{
    public MyForm()
    {
        InitializeComponent();
    }
    private async void StartLongRunningTask()
    {
        for (int i = 0; i <= 100; i++)
        {
            await Task.Delay(100); // 100ミリ秒待機
            UpdateProgressBar(i); // ProgressBarを更新
        }
    }
    private void UpdateProgressBar(int value)
    {
        if (progressBar1.InvokeRequired) // UIスレッドでない場合
        {
            progressBar1.Invoke(new Action<int>(UpdateProgressBar), value);
        }
        else
        {
            progressBar1.Value = value; // ProgressBarの値を更新
        }
    }
}

partial class MyForm : Form
{
    private BackgroundWorker backgroundWorker;
    public MyForm()
    {
        InitializeComponent();
        backgroundWorker = new BackgroundWorker();
        backgroundWorker.WorkerReportsProgress = true; // 進捗報告を有効にする
        backgroundWorker.DoWork += BackgroundWorker_DoWork; // 処理を定義
        backgroundWorker.ProgressChanged += BackgroundWorker_ProgressChanged; // 進捗更新を定義
    }
    private void StartLongRunningTask()
    {
        backgroundWorker.RunWorkerAsync(); // バックグラウンド処理を開始
    }
    private void BackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
    {
        for (int i = 0; i <= 100; i++)
        {
            System.Threading.Thread.Sleep(100); // 100ミリ秒待機
            backgroundWorker.ReportProgress(i); // 進捗を報告
        }
    }
    private void BackgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        progressBar1.Value = e.ProgressPercentage; // ProgressBarの値を更新
    }
}

partial class MyForm : Form
{
    private WebClient webClient;
    public MyForm()
    {
        InitializeComponent();
        webClient = new WebClient();
        webClient.DownloadProgressChanged += WebClient_DownloadProgressChanged; // 進捗更新イベント
    }
    private void StartFileDownload(string url)
    {
        webClient.DownloadFileAsync(new Uri(url), "downloadedFile.txt"); // 非同期ダウンロード開始
    }
    private void WebClient_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
    {
        progressBar1.Value = e.ProgressPercentage; // ProgressBarの値を更新
    }
}

partial class MyForm : Form
{
    private SqlConnection connection;
    public MyForm()
    {
        InitializeComponent();
        connection = new SqlConnection("your_connection_string"); // 接続文字列を指定
    }
    private async void StartDatabaseOperation()
    {
        await Task.Run(() =>
        {
            for (int i = 0; i <= 100; i++)
            {
                // データベース処理を模擬
                System.Threading.Thread.Sleep(50); // 処理時間を模擬
                UpdateProgressBar(i); // ProgressBarを更新
            }
        });
    }
    private void UpdateProgressBar(int value)
    {
        if (progressBar1.InvokeRequired) // UIスレッドでない場合
        {
            progressBar1.Invoke(new Action<int>(UpdateProgressBar), value);
        }
        else
        {
            progressBar1.Value = value; // ProgressBarの値を更新
        }
    }
}

partial class MyForm : Form
{
    public MyForm()
    {
        InitializeComponent();
    }
    private async void StartLongRunningProcess()
    {
        for (int i = 0; i <= 100; i++)
        {
            await Task.Delay(100); // 100ミリ秒待機
            UpdateProgressBar(i); // ProgressBarを更新
        }
    }
    private void UpdateProgressBar(int value)
    {
        if (progressBar1.InvokeRequired) // UIスレッドでない場合
        {
            progressBar1.Invoke(new Action<int>(UpdateProgressBar), value);
        }
        else
        {
            progressBar1.Value = value; // ProgressBarの値を更新
        }
    }
}