BackgroundWorker用法实例
自己的代码，就是要执行的代码写到dowork里，ProgressChanged事件是控制进度时用的，最后的Completed事件进度完成，也就是dowork里的代码执行完成了
public BackgroundWorker bgWork;
bgWork = new BackgroundWorker();
bgWork.WorkerReportsProgress = true;
bgWork.DoWork += new DoWorkEventHandler(bgWork_DoWork);
bgWork.ProgressChanged += new ProgressChangedEventHandler(bgWork_ProgressChanged);
bgWork.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bgWork_RunWorkerCompleted);
dp = new DownLoadProgress();
dp.progressBar1.Maximum = 1000;
dp.Show();
void bgWork_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
try
{
dp.lb_dw.Visible = true;
dp.Close();
if (e.Error != null)
{
MessageBox.Show("升级失败" + e.Error.Message);
}
else if (e.Result != null && e.Result.Equals(false))
{
}
else
{
if (TZSys.Common.SysUpdate.Update.SysUpdate.PerUpdate(AppDomain.CurrentDomain.BaseDirectory + "update\\"))
{
#region 升级数据库
List<string> sqlstr = new List<string>();
string[] files = Directory.GetFiles(AppDomain.CurrentDomain.BaseDirectory + "update\\");
foreach (string file in files)
{
if (file == AppDomain.CurrentDomain.BaseDirectory + "update\\"+"sql.txt")
{
using (FileStream fs = new FileStream(AppDomain.CurrentDomain.BaseDirectory + "update\\sql.txt", FileMode.Open, FileAccess.Read)) {
StreamReader sr = new StreamReader(fs);
while (sr.Peek()>=0)
{
sqlstr.Add(sr.ReadLine());
}
sr.Close();
fs.Close();
}
}
}
if (sqlstr.Count > 0)
{
string datapath = AppDomain.CurrentDomain.BaseDirectory + "Data";
string[] directorys = Directory.GetDirectories(datapath);
if (directorys.Length > 0)
{
foreach (string database in directorys)
{
string[] str = database.Split(‘\\‘);
string path = database + "\\" + str[str.Length-1]+".DB";
SqlOper sql = new SqlOper();
sql.DealSql(path, sqlstr);
}
}
File.Delete(AppDomain.CurrentDomain.BaseDirectory + "update\\" + "sql.txt");
}
#endregion
if (TZSys.Common.SysUpdate.Update.SysUpdate.StartUpdate(AppDomain.CurrentDomain.BaseDirectory + "update\\"))
{
//保存升级后的版本号
XmlDocument xml = new XmlDocument();
xml.Load(BlackBoard.DirectoryCurrent + "XML\\update.XML");
if (upcmid != "" && upmainid!="")
{
xml.GetElementsByTagName("cmpid")[0].InnerText = upcmid;
xml.GetElementsByTagName("mainid")[0].InnerText = upmainid;
xml.Save(BlackBoard.DirectoryCurrent + "XML\\update.XML");
}
if (MessageBox.Show("升级成功，是否重新启动", "提示", MessageBoxButtons.YesNo) == DialogResult.Yes)
{
if (File.Exists(BlackBoard.DirectoryCurrent + "SysUpdate.dll"))
File.Delete(BlackBoard.DirectoryCurrent + "SysUpdate.dll");
Application.Exit();
Process myProcess = new Process();
//string fileName = "ServiceClientIMForm.exe";startexe
string fileName = startexe;
ProcessStartInfo myProcessStartInfo = new ProcessStartInfo(fileName);
myProcess.StartInfo = myProcessStartInfo;
myProcess.Start();
//Environment.Exit(0);
}
}
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
//基本不用动
void bgWork_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
dp.progressBar1.Value = e.ProgressPercentage;
}
void bgWork_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker bw = (BackgroundWorker)sender;
try
{
if (!e.Argument.ToString().Contains(".zip"))
{
MessageBox.Show("更新包不是.zip文件，无法下载");
e.Result = false;
}
else if (!AppendDownLoad(e.Argument.ToString().Split(‘@‘)[0], e.Argument.ToString().Split(‘@‘)[1], bw))
{
MessageBox.Show("下载失败");
e.Result = false;
}
}
catch (Exception ex)
{
MessageBox.Show("下载失败" + ex.Message);
}
}
//BackgroundWorker的调用方法
public void DownloadFile(string url, string fileName)
{
fileName = DirPath + "\\" + fileName;
DFileName = fileName;
bgWork.RunWorkerAsync(url + "@" + fileName);//里面是参数是bgWork_DoWork事件的e.Argument
}
winform异步系统升级—BackgroundWorker
原文：http://www.cnblogs.com/dachuang/p/6098697.html