从URL获取图片并保存到本地

　　　　 ///   <summary>
///  HttpWebRequest Property
///   </summary>
///   <param name="fileName">文件名称</param>
///   <param name="url">图片地址</param>
///   <param name="localPath">本地路径("D:\\imgdow")</param>
public static void DownloadOneFileByURL(string fileName, string url, string localPath)
{
Stream s = null;
System.Net.HttpWebRequest request = null;
System.Net.HttpWebResponse response = null;
request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
request.Timeout = 5000; // 超时时间
response = (System.Net.HttpWebResponse)request.GetResponse();
s = response.GetResponseStream();
var imgs = Image.FromStream(s);
imgs.Save(localPath + $"/{fileName}.jpg");
s.Close();
}