也是比较老的东西了
最近用到
记录下以免以后忘了
要下载图片首先要有图片地址
要有图片地址就要先把网页下下来分析下URL
下载网页一般用两种方法
using System.Net;
using System.Windows.Forms;
string url = "http://www.cnblogs.com";
string result = null;
try
{
WebClient client = new WebClient();
result = client.DownloadString( url );
}
catch (Exception ex)
{
MessageBox.Show( ex.Message );
}
using System.Net; using System.IO; using System.Windows.Forms; string result = null; string url = "http://www.cnblogs.com"; WebResponse response = null; StreamReader reader = null; try { HttpWebRequest request = (HttpWebRequest)WebRequest.Create( url ); request.Method = "GET"; response = request.GetResponse(); reader = new StreamReader( response.GetResponseStream(), Encoding.UTF8 ); result = reader.ReadToEnd(); } catch (Exception ex) { MessageBox.Show( ex.Message ); } finally { if (reader != null) reader.Close(); if (response != null) response.Close(); }
至于怎么找图片url略过，直接说下载图片吧
其实和上面一样，也有两种方法：
1，WebRequest和WebResponse
WebRequest request = WebRequest.Create("http://images.cnblogs.com/logo_small.gif");
WebResponse response = request.GetResponse();
Stream reader = response.GetResponseStream();
FileStream writer = new FileStream("x:\\pic.jpg", FileMode.OpenOrCreate, FileAccess.Write);
byte[] buff = new byte[512];
int c = 0; //实际读取的字节数
while ((c=reader.Read(buff, 0, buff.Length)) > 0)
{
writer.Write(buff, 0, c);
}
writer.Close();
writer.Dispose();
reader.Close();
reader.Dispose();
response.Close();
2,WebClient
string url = "http://images.cnblogs.com/logo_small.gif"; string filepath = "x:\\pic.jpg"; WebClient mywebclient = new WebClient(); mywebclient.DownloadFile(url, filepath);
本文转自 sun8134 博客园博客，原文链接：http://www.cnblogs.com/sun8134/archive/2010/07/05/1771187.html ，如需转载请自行联系原作者
