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C# code:

public bool downfile(string url,string LocalPath)
{
try
{
Uri u = new Uri(url);
HttpWebRequest mRequest = (HttpWebRequest)WebRequest.Create(u);
mRequest.Method = "GET";
mRequest.ContentType = "application/x-www-form-urlencoded";

HttpWebResponse wr = (HttpWebResponse)mRequest.GetResponse();

Stream sIn = wr.GetResponseStream();
FileStream fs = new FileStream(LocalPath, FileMode.Create, FileAccess.Write);

long length = wr.ContentLength;
long i = 0;
decimal j=0;

while (i < length)
{
byte[] buffer = new byte[1024];
i += sIn.Read(buffer, 0, buffer.Length);
fs.Write(buffer, 0, buffer.Length);

if((i % 1024)==0)
{
j=Math.Round(Convert.ToDecimal((Convert.ToDouble(i)/Convert.ToDouble(length))*100),4);
statusBar1.Text="µ±Ç°ÏÂÔØÎļþ´óС:"+length.ToString()+"×Ö½Ú µ±Ç°ÏÂÔØ´óС:"+i+"×Ö½Ú ÏÂÔØ½ø¶È"+j.ToString()+"%";

}
else
{
statusBar1.Text="µ±Ç°ÏÂÔØÎļþ´óС:"+length.ToString()+"×Ö½Ú µ±Ç°ÏÂÔØ´óÐ


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