c#跨线程、跨类更新WinForm、WPF 进度UI

using System;
using System.Windows.Forms;
using System.Threading;

namespace UpdateUIDemo
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            InitializeComponent();
        }
        int p = 0;
        //声明一个委托，用来改变进度条状态
        Action<int> Progress { get; set; }
        private void SetFormProgress(int p)
        {
            this.progressBar1.Minimum = 0;
            this.progressBar1.Maximum = 200000;
            this.progressBar1.Value = p;
        }
        private void SetProgress(object sender,object e)
        {
           p = Convert.ToInt32(e);
            //进度变化事件触发后，在这里触发更改进度条状态的Action委托
            //子线程异步更改主线程控件UI，使用控件BeginInvoke方法，WPF为base.Dispatcher.BeginInvoke
            this.progressBar1.Invoke(Progress, p);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Work work = new Work();
            //进度变化时触发的事件执行的方法
            work.OnProgressChanged += SetProgress;
            //更改进度条
            Progress += SetFormProgress;
            Thread t = new Thread(work.DoWork);
            t.Start();
        }
    }
    class Work
    {
        // 声明一个监控进度变化的委托
        public delegate void  ProgressChangedHandler(object sender,object e);
        // 声明一个监控进度变化的事件
        public event  ProgressChangedHandler OnProgressChanged;
        //处理注册的事件
        private void ProgressChanged(object sender,object e)
        {
            OnProgressChanged.Invoke(sender,e);
        }
        public void DoWork()
        {
            
            for (int i = 0; i <= 200000; i++)
            {
                ProgressChanged(this,i);
            }
        }
    }
}