标签：get image ima stream ret isp byte auto nbsp
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();
}
标签：get image ima stream ret isp byte auto nbsp
原文地址：https://www.cnblogs.com/doudouzi/p/12036845.html
