进度条页面:
//===============================================================================
// Microsoft patterns & practices
// CompositeUI Application Block
//===============================================================================
// Copyright ?Microsoft Corporation. All rights reserved.
// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY
// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT
// LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
// FITNESS FOR A PARTICULAR PURPOSE.
//===============================================================================
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace BackgroudWokerUI
{
public partial class ProgressForm : Form
{
public ProgressForm()
{
InitializeComponent();
}
//工作完成后执行的事件
public void OnProcessCompleted(object sender, EventArgs e)
{
this.Close();
}
//工作中执行进度更新
public void OnProgressChanged(object sender, ProgressChangedEventArgs e)
{
progressWork.Value = e.ProgressPercentage;
}
private void btnClose_Click(object sender, EventArgs e)
{
Close();
}
}
}
主页面:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Threading;
//Note You must be careful not to manipulate any user-interface objects
//in your System.ComponentModel.BackgroundWorker.DoWork event handler.
//Instead, communicate to the user interface through the
//System.ComponentModel.BackgroundWorker.ProgressChanged and
//System.ComponentModel.BackgroundWorker.RunWorkerCompleted events.
namespace BackgroudWokerUI
{
public partial class MainForm : Form
{
//BindingList is useful list for UI
private IList<string> leftList = new BindingList<string>();
private IList<string> rightList = new BindingList<string>();
private BackgroundWorker worker = null;
public MainForm()
{
InitializeComponent();
//Databinding here
listBox1.DataSource = leftList;
listBox2.DataSource = rightList;
}
private void addButton_Click(object sender, EventArgs e)
{
if (textBox.Text.Length != 0)
{
leftList.Add(textBox.Text);
textBox.Text = "";
textBox.Focus();
}
}
private void moveButton_Click(object sender, EventArgs e)
{
//显示进度条
ProgressForm progressForm = new ProgressForm();
progressForm.Show();
// Prepare the background worker for asynchronous prime number calculation
//准备进度条的记数
worker= new BackgroundWorker();
// Specify that the background worker provides progress notifications
//指定提供进度通知
worker.WorkerReportsProgress = true;
// Specify that the background worker supports cancellation
//提供中断功能
worker.WorkerSupportsCancellation = true;
// The DoWork event handler is the main work function of the background thread
//线程的主要功能是处理事件
//开启线程执行工作
worker.DoWork += new DoWorkEventHandler(worker_DoWork);
// Specify the function to use to handle progress
//指定使用的功能来处理进度
worker.ProgressChanged += new ProgressChangedEventHandler(worker_ProgressChanged);
worker.ProgressChanged += new ProgressChangedEventHandler(progressForm.OnProgressChanged);
// Specify the function to run when the background worker finishes
// There are three conditions possible that should be handled in this function:
// 1. The work completed successfully
// 2. The work aborted with errors
// 3. The user cancelled the process
//进度条结束完成工作
//1.工作完成
//2.工作错误异常
//3.取消工作
worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
worker.RunWorkerCompleted+=new RunWorkerCompletedEventHandler(progressForm.OnProcessCompleted);
//If your background operation requires a parameter,
//call System.ComponentModel.BackgroundWorker.RunWorkerAsync
//with your parameter. Inside the System.ComponentModel.BackgroundWorker.DoWork
//event handler, you can extract the parameter from the
//System.ComponentModel.DoWorkEventArgs.Argument property.
//如果进度条需要参数
//调用System.ComponentModel.BackgroundWorker.RunWorkerAsync
//传入你的参数至System.ComponentModel.BackgroundWorker.DoWork
//提取参数
//System.ComponentModel.DoWorkEventArgs.Argument
worker.RunWorkerAsync(leftList);
}
//单线程执行工作
private void worker_DoWork(object sender, DoWorkEventArgs e)
{
MoveList((BackgroundWorker)sender,e);
}
//进行转移工作
private void MoveList(BackgroundWorker worker,DoWorkEventArgs e)
{
IList<string> list = e.Argument as IList<string>;
for (int i = 0; i < list.Count; i++)
{
// Check for cancellation
//检查取消
if (worker.CancellationPending)
{
e.Cancel = true;
break;
}
else
{
// This will be handled in the correct thread thanks to the
// internals of BackgroundWroker and AsyncOperation
worker.ReportProgress((i + 1) * (100 / list.Count), list[i]);
// Simulate some time consuming proccess.
//线程休眠
Thread.Sleep(500);
}
}
}
//添加数据至右边listBox
private void worker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
//Add string to the right listBox
rightList.Add(e.UserState as string);
}
//工作完成状态
private void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Cancelled)
{
label.Text = "Cancelled!取消";
}
else if (e.Error != null)
{
label.Text = "Error!异常";
}
else
{
label.Text = "Success!完成";
leftList.Clear();
}
}
//取消中
private void cancelButton_Click(object sender, EventArgs e)
{
if (worker.IsBusy)
{
label.Text = "Cancelling...";
//挂起进程
worker.CancelAsync();
}
}
//返回操作
private void moveBackButton_Click(object sender, EventArgs e)
{
foreach (string str in rightList)
{
leftList.Add(str);
}
rightList.Clear();
}
}
}
