下载服务器图片

public void Main()
{
//图片地址
DataTable imageList = null;//可文件夹循环，可sql

foreach (DataRow dr in imageList.Rows)
{
string imgUrl = dr["hf_fileUrl"].ToString();
string lourl = "E:\img\" + 名称;

var urls = GetBytesFromUrl(imgUrl);
if (urls != null)
{
WriteBytesToFile(lourl, urls);
}

}
}
public static byte[] GetBytesFromUrl(string url)
{
byte[] b;
try
{
HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(url);
WebResponse myResp = myReq.GetResponse();

Stream stream = myResp.GetResponseStream();
using (BinaryReader br = new BinaryReader(stream))
{
b = br.ReadBytes(500000);
br.Close();
}
myResp.Close();
}
catch (Exception ex)
{
b = null;
}
return b;

}
public static void WriteBytesToFile(string fileName, byte[] content)
{
FileStream fs = new FileStream(fileName, FileMode.Create);
BinaryWriter w = new BinaryWriter(fs);
try
{
w.Write(content);
}
finally
{
fs.Close();
w.Close();
}

}