C# 下载文件 winform

///<summary>
/// 下载文件
///</summary>
///<param name="URL">下载文件地址</param>
///<param name="Filename">下载后的存放地址</param>
///<param name="Prog">用于显示的进度条</param>
public void DownloadFile(string URL, string filename, System.Windows.Forms.ProgressBar prog)
{
try
{
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;

if (prog != null)
{
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;
System.Windows.Forms.Application.DoEvents();
so.Write(by, 0, osize);

if (prog != null)
{
prog.Value = (int)totalDownloadedByte;
}
osize = st.Read(by, 0, (int)by.Length);
}
so.Close();
st.Close();
}
catch (System.Exception)
{
throw;
}
}

posted on 2011-11-28 17:38  缘从心开始  阅读(391)  评论(0编辑  收藏  举报

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文章作者:(Super)
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