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没什么技术含量，主要留给自己查找方便；
如题，知道图片的完整网络路径的情况下，在浏览器中下载图片的实现：
下面这个方法实现的是把图片读取为byte数组：
private byte[] GetImageContent(string url) { HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.AllowAutoRedirect = true; WebProxy proxy = new WebProxy(); proxy.BypassProxyOnLocal = true; proxy.UseDefaultCredentials = true; request.Proxy = proxy; WebResponse response = request.GetResponse(); using (Stream stream = response.GetResponseStream()) { using (MemoryStream ms = new MemoryStream()) { Byte[] buffer = new Byte[1024]; int current = 0; while ((current = stream.Read(buffer, 0, buffer.Length)) != 0) { ms.Write(buffer, 0, current); } return ms.ToArray(); } } }
下面这方法是下载图片：
第一个参数：图片下载显示的文件名
第二个参数：通过上一个方法得到的byte数组，传进这里就可以了
private void WriteResponse(string picName, byte[] content) { Response.Clear(); Response.ClearHeaders(); Response.Buffer = false; Response.ContentType = "application/octet-stream"; Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(picName, Encoding.Default)); Response.AppendHeader("Content-Length", content.Length.ToString()); Response.BinaryWrite(content); Response.Flush(); Response.End(); }
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原文地址：http://www.cnblogs.com/zzgblog/p/5413593.html
