Use WebRequest object to invoke Sina weather forecast < Turn >

//the address you want to requeststringURL ="http://www.cnblogs.com"; //Create a WebRequest object, WebRequest is an abstract class that defines the requirements of the request,//can be used for various requests, such as Http, FTP, and so on. //HttpWebRequest is a derived class of WebRequest, specifically for HttpSystem.Net.HttpWebRequest Request= System.Net.HttpWebRequest.Create (URL) asSystem.Net.HttpWebRequest;//the way the request is set by the method property, the default is GET//you can set the Method property to any HTTP 1.1 protocol verb:, POST, PUT, DELETE, TRACE, or OPTIONS. Request. Method ="POST"; //you can also include cookies in your request//However, you must first create a Cookie containerRequest. Cookiecontainer =NewSystem.Net.CookieContainer (); System.Net.Cookie Requestcookie=NewSystem.Net.Cookie ("Request","Requestvalue","/","localhost"); request. Cookiecontainer.add (Requestcookie); Console.WriteLine ("Please enter the request parameters:"); //Enter the data for the POST.stringInputdata =console.readline ();//stitch into the request parameter string and encode it into bytesstringPostData ="firstone="+Inputdata; ASCIIEncoding encoding=Newasciiencoding ();byte[] byte1 =encoding. GetBytes (PostData); //set the Parameter form of the requestRequest. ContentType ="application/x-www-form-urlencoded"; //sets the length of the request parameter.Request. ContentLength =byte1. Length; //get the stream that is sent to the serverSystem.IO.Stream newstream =request. GetRequestStream (); //when a request is made using the POST method, the actual parameters are streamed through the Body part of the request, in the form of a streamNewstream.write (Byte1,0, Byte1. Length); //When you are finished, close the request flow.newstream.close ();//The GetResponse method really sends the request, waiting for the server to returnSystem.Net.HttpWebResponse Response=(System.Net.HttpWebResponse) request. GetResponse (); //first get the head of the response, you can know the length or type of the returned contentConsole.WriteLine ("Content length is {0}", Response. ContentLength); Console.WriteLine ("Content type is {0}", Response. ContentType); //The cookie in response is in the cookie containerforeach(System.Net.Cookie CookieinchResponse. Cookies) {Console.WriteLine ("Name: {0}, Value: {1}", cookies. Name, Cookie. Value);} Console.WriteLine (); //you can then get the content of the response in the form of a streamSystem.IO.Stream Receivestream=Response.     GetResponseStream (); //You can also wrap a byte stream into a high-level character stream for easy reading of text content//need to be aware of codingSystem.IO.StreamReader Readstream=NewSystem.IO.StreamReader (Receivestream, Encoding.UTF8); Console.WriteLine ("Response Stream received."); Console.WriteLine (Readstream.readtoend ()); //close the character stream when you are done, and the byte stream underlying the stream will automatically closeResponse. Close (); Readstream.close ();

Use WebRequest object to invoke Sina weather forecast

 Public stringGetWeather (stringCity ) {        stringweatherhtml =string.        Empty; //converting the encoding type of an input parameter        stringCityinfo = Httputility.urlencode (city,system.text.unicodeencoding.getencoding ("GB2312")); //Initializes a new WebrequstHttpWebRequest weatherrequest = (HttpWebRequest) webrequest.create ("http://php.weather.sina.com.cn/search.php?city="+cityinfo); HttpWebResponse Weatherresponse=(HttpWebResponse) weatherrequest.getresponse (); //returning data streams from Internet resourcesStream Weatherstream =Weatherresponse.getresponsestream (); //Read Data streamStreamReader Weatherstreamreader =NewStreamReader (Weatherstream,system.text.encoding.default); //reading Dataweatherhtml =Weatherstreamreader.readtoend ();        Weatherstreamreader.close ();        Weatherstream.close ();        Weatherresponse.close (); //View HTML source files for different Web sites        returnweatherhtml; }

Use WebRequest object to invoke Sina weather forecast < Turn >