1.下载文件并保存文件到本地
private void GetFileFromNetUrl(string url)
{
try
{
System.Net.WebRequest req = System.Net.WebRequest.Create(url);
req.Method = "GET";
//获得用户名密码的Base64编码 添加Authorization到HTTP头 不需要的账号密码的可以注释下面两行代码
string code = Convert.ToBase64String(Encoding.ASCII.GetBytes(string.Format("{0}:{1}", "userName", "passWord")));
req.Headers.Add("Authorization", "Basic " + code);
byte[] fileBytes;
using (WebResponse webRes = req.GetResponse())
{
int length = (int)webRes.ContentLength;
HttpWebResponse response = webRes as HttpWebResponse;
Stream stream = response.GetResponseStream(); //读取到内存
MemoryStream stmMemory = new MemoryStream();
byte[] buffer = new byte[length];
int i;
//将字节逐个放入到Byte中
while ((i = stream.Read(buffer, 0, buffer.Length)) > 0)
{
stmMemory.Write(buffer, 0, i);
}
fileBytes = stmMemory.ToArray();//文件流Byte，需要文件流可直接return，不需要下面的保存代码
stmMemory.Close(); MemoryStream m = new MemoryStream(fileBytes);
string file = string.Format("F:\\666666666666.pdf");//可根据文件类型自定义后缀
FileStream fs = new FileStream(file, FileMode.OpenOrCreate);
m.WriteTo(fs);
m.Close();
fs.Close();
}
}
catch (System.Exception ex)
{
throw ex;
}
}
2.下载文件流，返回byte流
private byte[] GetFileFromNetUrl(string url, string userName = "", string password = "")
{
try
{
System.Net.WebRequest req = System.Net.WebRequest.Create(url);
req.Method = "GET";
if (!string.IsNullOrEmpty(userName) && !string.IsNullOrEmpty(password))
{
//获得用户名密码的Base64编码 添加Authorization到HTTP头
string code = Convert.ToBase64String(Encoding.ASCII.GetBytes(string.Format("{0}:{1}", userName, password)));
req.Headers.Add("Authorization", "Basic " + code);
} byte[] fileBytes;
using (WebResponse webRes = req.GetResponse())
{
int length = (int)webRes.ContentLength;
HttpWebResponse response = webRes as HttpWebResponse;
Stream stream = response.GetResponseStream(); //读取到内存
MemoryStream stmMemory = new MemoryStream();
byte[] buffer = new byte[length];
int i;
//将字节逐个放入到Byte中
while ((i = stream.Read(buffer, 0, buffer.Length)) > 0)
{
stmMemory.Write(buffer, 0, i);
}
fileBytes = stmMemory.ToArray();//文件流Byte
stmMemory.Close();
}
return fileBytes;
}
catch (System.Exception ex)
{
throw ex;
}
}