/*
?*?author:Joey?Zhao
?*?date:2010-12-1
?*?describe:帶百分比的進度條使用方法：
?*?1?實例化一個ProcessOperator對象；
?*?2，賦值BackgroundWork（類型為一個參數，無返回值的委托，其中參數是一個具有一個int類型參數無返回值的委托，用來預報進度）屬性為要在后臺執(zhí)行的方法，詳見TestForm中的示例
?*?3，調用Start方法開始執(zhí)行
?*?4?在事件BackgroundWorkerCompleted中執(zhí)行后臺任務完成后的操作
?*/
using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.ComponentModel;

namespace?Process_test
{
????public?class?PercentProcessOperator
????{
????????private?BackgroundWorker?_backgroundWorker;//后臺線程
????????private?ProcessForm?_processForm;//進度條窗體
????????private?BackgroundWorkerEventArgs?_eventArgs;//異常參數
????????private?string?_inforMessage;

????????public?PercentProcessOperator（）
????????{
????????????_processForm?=?new?ProcessForm（）;
????????????_eventArgs?=?new?BackgroundWorkerEventArgs（）;
????????????_processForm.Processstyle?=?System.Windows.Forms.ProgressBarstyle.Continuous;
????????????_backgroundWorker?=?new?BackgroundWorker（）;
????????????_backgroundWorker.WorkerReportsProgress?=?true;
????????????_backgroundWorker.DoWork?+=?new?DoWorkEventHandler（_backgroundWorker_DoWork）;
????????????_backgroundWorker.RunWorkerCompleted?+=?new?RunWorkerCompletedEventHandler（_backgroundWorker_RunWorkerCompleted）;
????????????_backgroundWorker.ProgressChanged?+=?new?ProgressChangedEventHandler（_backgroundWorker_ProgressChanged）;
????????}

????????//顯示進度
????????private?void?_backgroundWorker_ProgressChanged（object?sender?ProgressChangedEventArgs?e）
????????{
????????????_processForm.MessageInfo?=?_inforMessage?+?“已完成：“?+?e.ProgressPercentage.ToString（）?+?“%“;
????????????_processForm.ProcessValue?=?e.ProgressPercentage;
????????}

????????//操作進行完畢后關閉進度條窗體
????????private?void?_backgroundWorker_RunWorkerCompleted（object?sender?RunWorkerCompletedEventArgs?e）
????????{
????????????if?（_processForm.Visible?==?true）
????????????{
????????????????_processForm.Close（）;
????????????}
????????????if?（this.BackgroundWorkerCompleted?!=?null）
????????????{
????????????????this.BackgroundWorkerCompleted（null?_eventArgs）;
????????????}
????????}

????????//后臺執(zhí)行的操作
????????private?void?_backgroundWorker_DoWork（object?sender?DoWorkEventArgs?e）
????????{
????????????if?（BackgroundWork?!=?null）
????????????{
????????????????try
????????????????{
????????????????????BackgroundWork（this.ReportPercent）;
????????????????}
????????????????catch?（Exception?ex）
????????????????{
????????????????????_eventArgs.BackGroundException?=?ex;
????????????????}
????????????}
????????}

????????#region?公共方法、屬性、事件

????????///?

????????///?設置進度條顯示的提示信息
????????///?

????????public?string?MessageInfo
????????{
????????????set?{?_inforMessage?=?value;?}
????????}

????????///?

????????///?后臺執(zhí)行的操作參數為一個參數為int型的委托；
????????///?在客戶端要執(zhí)行的后臺方法中可以使用Action<int>預報完成進度如：
????????///?
????????///?
????????///?PercentProcessOperator?o?=?new?Percen