C#获取网页信息下载网页图片
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下一篇 2013-04-02 18:50:15
/ 个人分类:C#
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
1,用system.net.webclient
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 );
}
2,用System.Net.HttpWebRequest
usingSystem.Net;usingSystem.IO;usingSystem.Windows.Forms;stringresult =null;stringurl = "http://www.cnblogs.com";
WebResponse response =null;
StreamReader reader =null;try{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create( url );
request.Method = "GET";
response = request.GetResponse();
reader =newStreamReader( 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 =newFileStream("x:\\pic.jpg", FileMode.OpenOrCreate, FileAccess.Write);byte[] buff =newbyte[512];intc = 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
stringurl = "http://images.cnblogs.com/logo_small.gif";stringfilepath = "x:\\pic.jpg";
WebClient mywebclient =newWebClient();
mywebclient.DownloadFile(url, filepath);
大体就这么多…
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