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在这里，我在 C# 中使用简单的逻辑。我从两个DateTimePickers 中减去天数并生成与GridView总天数相同的行数。我把这个逻辑放在 aTimer中，它以 100 毫秒的间隔滴答并自动执行。这适用于 90-100 行，但如果它达到 1000 行，那么程序就会卡住。所以，我想我需要使用线程。我怎样才能做到这一点？我知道基本的多线程，并尝试了这个，但没有奏效：

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

void myMethod() {
    ed_Picker.MinDate = sd_Picker.Value;
    TimeSpan ts = new TimeSpan();

    //GridView.Rows.cont

    label3.Text = ed_Picker.Value.CompareTo(sd_Picker.Value).ToString();
    //dateTimePicker2.MinDate = dateTimePicker1.Value;

    ts = ed_Picker.Value.Subtract(sd_Picker.Value);
    double d;

    d = Math.Ceiling(ts.TotalDays) + 1;
    label3.Text = d.ToString();
    DataGridViewRow row = new DataGridViewRow();


    GridView.RowCount = Int32.Parse(d.ToString()); // This is key line which I like to put in new Thread
    for (int i = 1; i <= GridView.RowCount; i++)
    {
        GridView.Rows[i - 1].Cells[0].Value = sd_Picker.Value.AddDays(Convert.ToDouble(i - 1)).ToLongDateString();
        GridView.Rows[i - 1].Cells[0].ReadOnly = true;
    }
    DateTimeConverter dtc = new DateTimeConverter();
    TimeSpan ts1 = new TimeSpan();

    try
    {
        for (int i = 0; i < GridView.RowCount; i++)
        {
            ts1 += Convert.ToDateTime(GridView.Rows[i].Cells[2].Value).Subtract(Convert.ToDateTime(GridView.Rows[i].Cells[1].Value));
        }
    }
    catch (Exception ex)
    {

    }

    label6.Text = ts1.ToString();
}
4

1 回答 1

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以下是如何使用 BackgroundWorker 进行线程工作和更新 UI 的总体思路：

var worker = new BackgroundWorker {WorkerReportsProgress = true};
worker.DoWork += this.ThreadWorkMethod;
worker.ProgressChanged += this.ThreadProgressMethod;
worker.RunWorkerAsync();

...

private void ThreadWorkMethod(object sender, DoWorkEventArgs e)
{
    var worker = (BackgroundWorker)sender;

    for (int i = 0; i = 1000; i++)
    {
        // Time consuming operation
        Thread.Sleep(1000);

        worker.ReportProgress(i * 100d / 1000, i);
    }
}

private void ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    // Here you can access controls, etc.

    if (e.Progresspercentage == 100)
    {
        this.progLabel.Text = "100% Done";
    }
    else
    {
        this.progLabel.Text = string.Format("{0}% ({1} / 1000)",
                                            e.ProgressPercentage,
                                            e.UserState);
    }
}

如果您也想收听该RunWorkerCompleted事件 - 您还可以从那里访问控件等。

所以 DoWork 方法就是做硬线程工作，并调用 ReportProgress 以便它可以在需要时适当地更改 UI。当 DoWork 方法完成（返回或完成）时，将自动调用 RunWorkerCompleted 事件。

于 2012-06-12T14:52:36.917 回答