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How to make a Http request from a .net window form application

I have a .net window form application but I have to get
data from various web sites. How do I make Http request
(preferrably via post method) from a window form to get
the data from those web sites?
What namespace and dll do I have to include?
A walkthrough and coding example will be helpful.
...

Nov 16 '05 #1
1 5525
edx
> I have a .net window form application but I have to get
data from various web sites. How do I make Http request
(preferrably via post method) from a window form to get
the data from those web sites?
What namespace and dll do I have to include?
A walkthrough and coding example will be helpful.

Hi,

This is a sample that I have done recently:

Namespace of the types is:

using namespace System::Net;

System::Net::Ht tpWebRequest *Request =

__try_cast <System::Net::H ttpWebRequest *>

(System::Net::H ttpWebRequest:: Create (Shttp://www.somesite.co m));

String *Content, *Identifier;

// Do the actual request

//

String *Query = "IDENT=";

Query = String::Concat (Query, Ident);

Query = String::Concat (Query, "&USERLOGID =");

Query = String::Concat (Query, UserLogid);

Query = String::Concat (Query,
"&ENTRYLENG TH=-1&EXTRAINPUT=&E XTRAINPUTLENGTH =-1&ENTRY=");

Query = String::Concat (Query, Question);

Request->Method = S"POST";

Request->ContentType = S"applicatio n/x-www-form-urlencoded;
charset=\"utf-8\"";

Request->ContentLengt h = Query->Length;

StreamWriter *sw = new StreamWriter (Request->GetRequestStre am ());

sw->Write (Query);

sw->Close ();

WebResponse *Response;

try {

Response = Request->GetResponse ();

} catch (Exception *) {

p->GetIdent ();

return;

}

Content = (new StreamReader (Response->GetResponseStr eam ()))->ReadToEnd ();

Content contains the response of the webserver.

I hope that helped,
Felix Arends
Nov 16 '05 #2

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