c# 跨线程委托操作

控件

button
lable
progressBar

主程序

//更新UI
  private void UpdataUIStatus(int step)
{
    if (InvokeRequired)
    {

        this.Invoke(new Action<int>(delegate (int s)//匿名委托
        {
           // Thread.Sleep(10);
            this.progressBar1.Value += s;
            this.label1.Text = this.progressBar1.Value.ToString() + "/" + this.progressBar1.Maximum.ToString();
        }), step);
    }
    else
    {
        this.progressBar1.Value += step;
        this.label1.Text = this.progressBar1.Value.ToString() + "/" + this.progressBar1.Maximum.ToString();
    }
}
//完成任务时需要调用
private void Accomplish()
{
    MessageBox.Show("任务完成");
}
private void button1_Click(object sender, EventArgs e)
{
    int taskCount = 10000; //任务量为10000
    this.progressBar1.Maximum = taskCount;
    this.progressBar1.Value = 0;

    DataWrite dataWrite = new DataWrite();//实例化对象
    dataWrite.UpdateUIDelegate += UpdataUIStatus;//前面的函数委托后面的函数执行
    dataWrite.TaskCallBack += Accomplish;//前面的函数委托后面的函数执行

    Thread thread = new Thread(new ParameterizedThreadStart(dataWrite.Write)); //开启新的线程，执行write()函数
    thread.IsBackground = true;
    thread.Start(taskCount);
}

对象类

public class DataWrite
{
    public Action<int> UpdateUIDelegate;//申明一个可以包裹1个int参数函数的委托
    public Action TaskCallBack;//申明一个可以包裹1个无返回函数的委托
    public void Write(object lineCount)
    {
        for (int i = 0; i < (int)lineCount; i++)
        {
            Thread.Sleep(100);
            UpdateUIDelegate(1);
        }
        TaskCallBack();
    }
}