Form的ShowDialog() 阻塞Or不阻塞?

[zqcoder]

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace WindowsFormsApplication11
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        BackgroundWorker bgw = new BackgroundWorker();
        private void button1_Click(object sender, EventArgs e)
        {
            bgw.RunWorkerAsync();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            bgw.WorkerReportsProgress = true;
            bgw.DoWork += new DoWorkEventHandler(bgw_DoWork);
            bgw.ProgressChanged += new ProgressChangedEventHandler(bgw_ProgressChanged);
            label1.Text = "主窗体:线程ID" + Thread.CurrentThread.ManagedThreadId.ToString();
        }

        void bgw_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            Form2 o = new Form2();
            o.text = "当前线程ID:"+Thread.CurrentThread.ManagedThreadId.ToString();
                
            o.ShowDialog();
        }

        void bgw_DoWork(object sender, DoWorkEventArgs e)
        {
            int i = 0;
            while (true)
            {
                bgw.ReportProgress(100, null);
                Thread.Sleep(1000);
                i++;
                if (i > 10)
                {
                    break;
                }
            }
        }
    }
}

bgw_ProgressChanged是在主线程被调用的,为什么能陆续弹出12个窗体,按道理ShowDialog应该阻塞线程啊

[z821134886]

感觉代码有些乱，不过很实用

[E次奥]

是不是因为事件是在Loaded中注册的，所以在Load的时候已经执行了事件。 你试着在changed里边注册DoWork