C#实现网络下载文件
public static bool DownLoadFiles(string uri, string filefullpath, int size = 1024)
{
try
{
if (File.Exists(filefullpath))
{
try
{
File.Delete(filefullpath);
}
catch (Exception ex)
{
return false;
}
}
string fileDirectory = System.IO.Path.GetDirectoryName(filefullpath);
if (!Directory.Exists(fileDirectory))
{
Directory.CreateDirectory(fileDirectory);
}
FileStream fs = new FileStream(filefullpath, FileMode.Create);
byte[] buffer = new byte[size];
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
request.Timeout = 10000;
request.AddRange((int)fs.Length);
Stream ns = request.GetResponse().GetResponseStream();
long contentLength = request.GetResponse().ContentLength;
int length = ns.Read(buffer, 0, buffer.Length);
while (length > 0)
{
fs.Write(buffer, 0, length);
buffer = new byte[size];
length = ns.Read(buffer, 0, buffer.Length);
}
fs.Close();
return true;
}
catch (Exception ex)
{
return false;
}
}
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