使用HttpClient异步方法的BackgroundWorker

我过去曾在Windows窗体应用程序中使用过BackgroundWorker。对于我的新练习，我需要在工人内部使用async方法，对此我有点困惑。

这是我的代码结构。在表单加载事件中，我正在创建BackgroundWorker对象和设置事件

private void fMain_Load( object sender, EventArgs e ) {
    bw = new BackgroundWorker();
    bw.WorkerReportsProgress = true;
    bw.DoWork += new DoWorkEventHandler( bw_DoWork );
    bw.ProgressChanged += new ProgressChangedEventHandler( bw_ProgressChanged );
    bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler( bw_RunWorkerCompleted );
}

当用户点击按钮时，我正在启动工作

private void btnGenerate_Click( object sender, EventArgs e ) {
    Settings settings = new Settings();
    pbCounter.Visible = true;
    btnGenerate.Enabled = false;
    bw.RunWorkerAsync( settings );
}

这是工人代码

private async void bw_DoWork( object sender, DoWorkEventArgs e ) {
    try {
        for ( int ix = 1; i <= 100; i++ ) {
            using (var client = new HttpClient()) {
                [???? how to call and wait here ????]
                HttpResponseMessage response = await client.PostAsync( "endpoint", new StringContent( JsonConvert.SerializeObject( formContent ), Encoding.UTF8, "application/json" ) );
            }
            //The counter will keep track of your process
            Application.DoEvents();
            int percentage = ix * 100 / settings.TotalRuns;
            bw.ReportProgress( percentage );
        }
    }
    catch ( Exception ex ) {
        MessageBox.Show( ex.Message, "Gift Creator", MessageBoxButtons.OK, MessageBoxIcon.Error );
    }
}

    private async void btnGenerate_Click(object sender, EventArgs e)
    {
        const int totalRuns = 5;
        pbCounter.Visible = true;
        pbCounter.Minimum = 0;
        pbCounter.Maximum = totalRuns;
        pbCounter.Value = 0;
        btnGenerate.Enabled = false;
        try
        {
            for ( int i = 1; i <= totalRuns; i++ ) 
            {
                using (var client = new HttpClient()) 
                    await client.PostAsync( "endpoint", new StringContent( JsonConvert.SerializeObject( formContent ), Encoding.UTF8, "application/json" ) );
                pbCounter.Value = i;
            }
        }
        catch (Exception ex )
        {
            MessageBox.Show( ex.Message, "Gift Creator", MessageBoxButtons.OK, MessageBoxIcon.Error );
        }
        btnGenerate.Enabled = true;
    }