Csharp/CSharp Tutorial/Network/WebRequest — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Версия 18:31, 26 мая 2010
Содержание
Download image from a website
<source lang="csharp">using System; using System.Net; using System.IO; using System.Drawing; using System.Collections; using System.ruponentModel; using System.Windows.Forms; public class MainClass {
[STAThread] public static void Main(string[] args) { string picUri = "http://www.java.ru/style/logo.PNG"; // Create the requests. WebRequest requestPic = WebRequest.Create(picUri); WebResponse responsePic = requestPic.GetResponse(); Image webImage = Image.FromStream(responsePic.GetResponseStream()); }
}</source>
Reading Web Page As HTML
<source lang="csharp">using System; using System.Collections.Generic; using System.IO; using System.Net; using System.Net.Sockets; using System.Text;
public class Client { static public void Main(string[] Args) { HttpWebRequest webRequest =(HttpWebRequest)WebRequest.Create("http://www.google.ru/"); HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse(); StreamReader streamReader = new StreamReader(webResponse.GetResponseStream(), Encoding.ASCII); string outputString = streamReader.ReadToEnd(); Console.WriteLine(outputString); streamReader.Close(); } }</source>
Save what you read from WebRequest to a file
<source lang="csharp">using System.ruponentModel; using System.IO; using System.Net;
class MainClass { static void Main() { WebRequest request = WebRequest.Create("http://nfex.ru"); using (WebResponse response = request.GetResponse()) using (Stream responseStream = response.GetResponseStream()) using (FileStream output = File.Create("response.dat")) { Copy(responseStream, output); } } const int BufferSize = 8192; public static void Copy(Stream input,Stream output) { byte[] buffer = new byte[BufferSize]; int read; while ((read = input.Read(buffer, 0, buffer.Length)) > 0) { output.Write(buffer, 0, read); } } public static byte[] ReadFully(Stream input) { using (MemoryStream tempStream = new MemoryStream()) { Copy(input, tempStream); if (tempStream.Length == tempStream.GetBuffer().Length) { return tempStream.GetBuffer(); } return tempStream.ToArray(); } } }</source>
Use WebRequest
<source lang="csharp">using System; using System.Net; using System.IO; class MainClass {
[STAThread] static void Main(string[] args) { WebRequest MyRequest = WebRequest.Create("http://www.nfex.ru"); WebResponse MyResponse = MyRequest.GetResponse(); Stream MyStream = MyResponse.GetResponseStream(); StreamReader MyReader = new StreamReader(MyStream); string MyWebLine; while ((MyWebLine = MyReader.ReadLine()) != null) { Console.WriteLine(MyWebLine); } MyStream.Close(); }
}</source>
Use WebRequest and WebResponse to read a web page
<source lang="csharp">using System; using System.Net; using System.IO; public class MainClass {
[STAThread] public static void Main(string[] args) { string htmlUri = "http://www.nfex.ru"; WebRequest requestHtml = WebRequest.Create(htmlUri); WebResponse responseHtml = requestHtml.GetResponse(); // Read the text from the response stream. using (StreamReader r = new StreamReader(responseHtml.GetResponseStream())) { Console.WriteLine( r.ReadToEnd()); } }
}</source>
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Use WebRequest to create a StreamReader
<source lang="csharp">using System; using System.Collections.Generic; using System.Text; using System.Net; using System.IO; class MainClass {
static void Main(string[] args) { StreamReader reader = new StreamReader(WebRequest.Create("http://www.nfex.ru").GetResponse().GetResponseStream()); string line; while ((line = reader.ReadLine()) != null) { Console.WriteLine(line); } }
}</source>
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