学步园

private void btnNext_Click(object sender, EventArgs e)<br /> {<br /> if (isUpdate)<br /> {<br /> Thread threadDown = new Thread(new ThreadStart(DownUpdateFile));<br /> threadDown.IsBackground = true;<br /> threadDown.Start();<br /> }<br /> else<br /> {<br /> MessageBox.Show("没有可用的更新!", "自动更新", MessageBoxButtons.OK, MessageBoxIcon.Information);<br /> return;<br /> }<br /> }</p> <p> private void DownUpdateFile()<br /> {<br /> KillMainAppRun();<br /> string temp = string.Empty;<br /> string temp2 = string.Empty;<br /> string[] keys = fileNameDic.Keys.ToArray();<br /> for (int i = 0; i < keys.Length; i++)<br /> {<br /> temp = updateUrl + "//" + keys[i];<br /> temp2 = tempUpdatePath + "//" + keys[i];<br /> WebClient webClient = new WebClient();<br /> if (webClient.IsBusy)<br /> {<br /> webClient.CancelAsync();<br /> }<br /> webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(webClient_DownloadProgressChanged);<br /> webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(webClient_DownloadFileCompleted);<br /> webClient.DownloadFileAsync(new System.Uri(temp), temp2, keys[i]);<br /> }<br /> }<br /> private void webClient_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)<br /> {<br /> UpdateProgressUI(e.ProgressPercentage);<br /> string text = string.Format("正在下载{0}，完成进度{1}/{2}(字节)", e.UserState.ToString(), e.BytesReceived, e.TotalBytesToReceive);<br /> UpdateLableText(text);<br /> Thread.Sleep(800);<br /> }<br /> private void webClient_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)<br /> {<br /> if (e.Cancelled)<br /> UpdateLableText("下载被取消!");<br /> else<br /> {<br /> UpdateLableText("下载完成!");<br /> }<br /> }

我这里其实做的是一个自动升级程序(这里使用webclient 异步更新数据 )只贴了部分代码;

大体思路就是利用 本地和服务器都存在一个程序升级xml 文件,比较更新时间 来确定需要下载那些文件

xml 大体格式如下

<?xml version="1.0" encoding="gb2312"?>
<AutoUpdater>
  <description>Application autoUpdate</description>
  <Updater>
 <Url>http://192.168.167.85/WebService/SoftUpdate</Url>
 <LastUpdateTime>2008-09-05</LastUpdateTime>
  </Updater>
  <Application applicationId="ForestryPDA">
    <EntryPoint>ForestryPDA</EntryPoint>
 <Version>1.0.0.0</Version>
  </Application>
  <Files>
    <File Ver="1.0.0.0" Name="test.txt"/>
    <File Ver="1.0.0.0" Name="lgms.ico"/>
    <File Ver="1.0.0.0" Name="FormUI.exe"/>
  </Files>
</AutoUpdater>

xml 里面放服务ip地址,有可能服务器地址有变化,

还有 需要下载的文件列表

大家在写过程当中 有可能提示大家web不支持并发io操作,这里要注意创建多个webclient对象,不会出现这种情况了!

这里有一篇 使用webservcie 来做的自动升级

http://blog.csdn.net/zhoujun2008/archive/2009/08/31/4503179.aspx 

没细看.