显示下载进度条的Asp.net(C#)函数

转载于 2007-11-06 12:41:00 发布 · 742 阅读

文章标签：

#asp.net #c# #string #byte #url

asp.net2.0 专栏收录该内容

123 篇文章

订阅专栏

本文介绍了一个使用C#实现的文件下载方法，该方法能够显示下载进度。通过创建HTTP请求并利用流(Stream)来读取远程文件内容，同时更新进度条以实时反馈下载状态。

public static void DownFile( string URL, string Filename, ProgressBar Prog )
{
System.Net.HttpWebRequest Myrq = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(URL);
System.Net.HttpWebResponse myrp = (System.Net.HttpWebResponse)Myrq.GetResponse();
long totalBytes = myrp.ContentLength;
Prog.Maximum = (int)totalBytes;
System.IO.Stream st = myrp.GetResponseStream();
System.IO.Stream so = new System.IO.FileStream(Filename, System.IO.FileMode.Create);
long totalDownloadedByte = 0;
byte[] by = new byte[1024];
int osize = st.Read(by, 0, (int)by.Length);
while (osize > 0)
{
totalDownloadedByte = osize + totalDownloadedByte;
Application.DoEvents();
so.Write(by, 0, osize);
Prog.Value = (int)totalDownloadedByte;
osize = st.Read(by, 0, (int)by.Length);
}
so.Close();
st.Close();
}