[C#] 取得 URL 頁面上的 title 內容

原始碼

1. //using System.Net; 
2. //using System.IO; 
3. //using System.Text; 
4.  
5. string url = @"http://msdn.microsoft.com/en-us/library/az24scfc.aspx"; 
6. string title = String.Empty; 
7.  
8. WebResponse response = null; 
9. WebRequest request = WebRequest.Create(url); 
10.  
11. /*設定最長執行的毫秒數*/ 
12. request.Timeout = 10000;  
13.  
14. try{ 
15.    /*取得 URL 頁面資料*/ 
16.    response = request.GetResponse(); 
17.    StreamReader stream = new StreamReader( 
18.        response.GetResponseStream(), Encoding.UTF8 
19.    ); 
20.  
21.    /*只取得前 4096 個字*/ 
22.    char[] buf = new char[4096]; 
23.    stream.Read(buf, 0, buf.Length); 
24.  
25.    /*尋找標題字串*/ 
26.    string pageText = new String(buf); 
27.    string pattern = @"(?<=<title[^>]*>)([^<]*)(?=</title>)"; 
28.    title = Regex.Match(pageText, pattern, RegexOptions.IgnoreCase) 
29.            .Value.Trim(); 
30.  
31. }catch(WebException e){ 
32. }finally{ 
33.    if(response!=null){ response.Close(); } 
34. } 
35.  
36. title.Dump(); 

//using System.Net;
//using System.IO;
//using System.Text;

string url = @"http://msdn.microsoft.com/en-us/library/az24scfc.aspx";
string title = String.Empty;

WebResponse response = null;
WebRequest request = WebRequest.Create(url);

/*設定最長執行的毫秒數*/
request.Timeout = 10000; 

try{
    /*取得 URL 頁面資料*/
    response = request.GetResponse();
    StreamReader stream = new StreamReader(
        response.GetResponseStream(), Encoding.UTF8
    );

    /*只取得前 4096 個字*/
    char[] buf = new char[4096];
    stream.Read(buf, 0, buf.Length);

    /*尋找標題字串*/
    string pageText = new String(buf);
    string pattern = @"(?<=<title[^>]*>)([^<]*)(?=</title>)";
    title = Regex.Match(pageText, pattern, RegexOptions.IgnoreCase)
            .Value.Trim();

}catch(WebException e){
}finally{
    if(response!=null){ response.Close(); }
}

title.Dump();