让ajax在jsf中呈现多个消息

Question

在这个例子中

 private Task ProcessData(List<Tuple<int,string>> list, IProgress<ProgressReport> progress)
 {
        int index = 1;
        int totalprogress = list.Count;
        var progressreport = new ProgressReport();

        return Task.Run(()=> {
            for(int i = 0; i < totalprogress; i++)
            {
                Tuple<int, string> temp = list[i];
                int id = temp.Item1;
                string address = temp.Item2;
                label_autoupdate.Text = string.Format("Processing ...{0}",address);
                excuteAutoUpdate(id, address);
                progressreport.PercentComplete = i++ * 100 / totalprogress;
                progress.Report(progressreport);
                Thread.Sleep(10);
            }
           // groupBox_autoupdate.Visible = false;

        });
}

private  async void button_update_tracking_Click(object sender, EventArgs e)
{
    List<Tuple<int, string>> list = new List<Tuple<int, string>>();
    //..
    var progress = new Progress<ProgressReport>();

    progress.ProgressChanged += (o, report) =>
        {
            progressBar1.Value = report.PercentComplete;
            progressBar1.Update();
        };

    await ProcessData(list, progress);
}

我有实时的最新错误消息，但从来没有，一旦我发出电子邮件错误，它会显示覆盖名称错误，反之亦然，但如果我删除 f：ajax 组件并使用 h：commandButton 进行刷新，我正确显示了两个错误。我需要使用其他活动吗？