Buffer=null;
System.Net.WebClient webClient=new System.Net.WebClient (" https://music.douban.com/artists/genre_page/8/");
System.Net.WebClient webclient=webclient;
Buffer=webclient. DownloadData (" https://music.douban.com/artists/genre_page/8/");
A string of HTML=System. Text. Encoding. GetEncoding (" utf-8 "). Get string (buffer);

CodePudding user response:

"WebClient" does not include using a parameter of the constructor is not prompt you? Look at the number of parameters you find you corresponding to this method requires several parameters

CodePudding user response:

Webclient only a no-parameter constructor, you put parameters? You baidu search.net webclient one to grasp a large example

CodePudding user response:

 public class WebClientHelper 
{
Public static string DownloadString (string url) 
{
WebClient wc=new WebClient (); 
//wc. BaseAddress=url;//set the root directory 
Wc. Encoding=Encoding. UTF8;//set according to what the code to access, without coming here, get to the Chinese string will be garbled 
String STR=wc. DownloadString (url); 
return str; 
} 
Public static string DownloadStreamString (string url) 
{
WebClient wc=new WebClient (); 
Wc. Headers. Add (" the user-agent ", "Mozilla/5.0 (Windows NT 10.0; Win64. X64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36 "); 
Stream objStream=wc. OpenRead (url); 
StreamReader _read=new StreamReader (objStream, Encoding UTF8);//to create a new read flow, using the specified encoding read, this is a utf-8 
String STR=_read. ReadToEnd (); 
ObjStream. Close (); 
_read. Close (); 
return str; 
} 

Public static void DownloadFile (url string, the string filename) 
{
WebClient wc=new WebClient (); 
Wc. DownloadFile (url, filename);//download file 
} 

Public static void DownloadData (url string, the string filename) 
{
WebClient wc=new WebClient (); 
Byte [] bytes=wc. DownloadData (url);//download to byte array 
FileStream fs=new FileStream (filename, FileMode. Create); 
Fs. Write (bytes, 0, bytes. Length); 
Fs. Flush (); 
Fs. The Close (); 
} 

Public static void DownloadFileAsync (url string, the string filename) 
{
WebClient wc=new WebClient (); 
Wc. DownloadFileCompleted +=DownCompletedEventHandler; 
Wc. DownloadFileAsync (new Uri (url), filename); 
Console. WriteLine (" download,,, "); 
} 
Private static void DownCompletedEventHandler (object sender, AsyncCompletedEventArgs e) 
{
Console. WriteLine (sender. ToString ());//the triggering event object 
Console. WriteLine (e.U serState); 
Console. WriteLine (e.c. with our fabrication: ancelled); 
Console. WriteLine (" asynchronous download is complete!" ); 
} 

Public static void DownloadFileAsync2 (url string, the string filename) 
{
WebClient wc=new WebClient (); 
Wc. DownloadFileCompleted +=(sender, e)=& gt; 
{
Console. WriteLine (" the download is complete!" ); 
Console. WriteLine (sender. ToString ()); 
Console. WriteLine (e.U serState); 
Console. WriteLine (e.c. with our fabrication: ancelled); 
}; 
Wc. DownloadFileAsync (new Uri (url), filename); 
Console. WriteLine (" download,,, "); 
} 
}