C # Call get, post, and soap to call WebService

I don't remember where I saw it. I saved it and posted it for reference.

 

Using system;
Using system. Web;
Using system. xml;
Using system. collections;
Using system. net;
Using system. text;
Using system. IO;
Using system. xml. serialization;

// By huangz 2008-3-19

/// <Summary>
/// Use webrequest/webresponse to call WebService

/// </Summary>
Public class websvccaller
{
// <WebServices>
// <Protocols>
// <Add name = "httpget"/>
// <Add name = "httppost"/>
/// </Protocols>
// </WebServices>

Private Static hashtable _ xmlnamespaces = new hashtable (); // cache xmlnamespace to avoid repeated calls to getnamespace

//

// WebService is required to support post calling
///
Public static xmldocument querypostwebservice (string URL, string methodname, hashtable PARS)
{< br> httpwebrequest request = (httpwebrequest) httpwebrequest. create (URL + "/" + methodname);
request. method = "Post";
request. contenttype = "application/X-WWW-form-urlencoded";
setwebrequest (request);
byte [] DATA = encodepars (PARs );
writerequestdata (request, data);

return readxmlresponse (request. getresponse ());
}< br>
///

// WebService is required to support get call
///
public static xmldocument querygetwebservice (string URL, string methodname, hashtable PARS)
{< br> httpwebrequest request = (httpwebrequest) httpwebrequest. create (URL + "/" + methodname + "? "+ Parstostring (PARs);
request. method = "get";
request. contenttype = "application/X-WWW-form-urlencoded";
setwebrequest (request);
return readxmlresponse (request. getresponse ();
}

//

// universal WebService call (SOAP ), pars is a string-type parameter name and value
///
Public static xmldocument querysoapwebservice (string URL, string methodname, hashtable PARS)
{< br> If (_ xmlnamespaces. containskey (URL)
{< br> return querysoapwebservice (URL, methodname, pars, _ xmlnamespaces [url]. tostring ();
}< br> else
{< br> return querysoapwebservice (URL, methodname, pars, getnamespace (URL ));
}< BR >}

Private Static xmldocument querysoapwebservice (string URL, string methodname, hashtable pars, string xmlns)
{
_ Xmlnamespaces [url] = xmlns; // Add cache to improve efficiency
Httpwebrequest request = (httpwebrequest) httpwebrequest. Create (URL );
Request. method = "Post ";
Request. contenttype = "text/XML; charsets = UTF-8 ";
Request. headers. Add ("soapaction", "/" "+ xmlns + (xmlns. endswith ("/")? "": "/") + Methodname + "/"");
Setwebrequest (request );
Byte [] DATA = encodeparstosoap (pars, xmlns, methodname );
Writerequestdata (request, data );
Xmldocument Doc = new xmldocument (), doc2 = new xmldocument ();
Doc = readxmlresponse (request. getresponse ());

Xmlnamespacemanager Mgr = new xmlnamespacemanager (Doc. nametable );
Mgr. addnamespace ("Soap "," Http://schemas.xmlsoap.org/soap/envelope/ ");
String retxml = Doc. selectsinglenode ("// soap: body/*", MGR). innerxml;
Doc2.loadxml ("<root>" + retxml + "</root> ");
Adddelaration (doc2 );
Return doc2;
}
Private Static string getnamespace (string URL)
{
Httpwebrequest request = (httpwebrequest) webrequest. Create (URL + "? WSDL ");
Setwebrequest (request );
Webresponse response = request. getresponse ();
Streamreader sr = new streamreader (response. getresponsestream (), encoding. utf8 );
Xmldocument Doc = new xmldocument ();
Doc. loadxml (Sr. readtoend ());
Sr. Close ();
Return Doc. selectsinglenode (" // @ Targetnamespace "). Value ;
}
Private Static byte [] encodeparstosoap (hashtable pars, string xmlns, string methodname)
{
Xmldocument Doc = new xmldocument ();
Doc. loadxml ("<soap: envelope xmlns: xsi = /" Http://www.w3.org/2001/XMLSchema-instance/ "Xmlns: XSD = /" Http://www.w3.org/2001/XMLSchema/ "Xmlns: Soap = /" Http://schemas.xmlsoap.org/soap/envelope// "> </soap: Envelope > ");
Adddelaration (DOC );
Xmlelement soapbody = Doc. createelement_x_x ("Soap", "body "," Http://schemas.xmlsoap.org/soap/envelope/ ");
Xmlelement soapmethod = Doc. createelement_x_x (methodname );
Soapmethod. setattribute ("xmlns", xmlns );
Foreach (string K in pars. Keys)
{
Xmlelement soappar = Doc. createelement_x_x (k );
Soappar. innerxml = objecttosoapxml (PARs [k]);
Soapmethod. appendchild_xss (soappar );
}
Soapbody. appendchild_xss (soapmethod );
Doc. documentelement. appendchild_xss (soapbody );
Return encoding. utf8.getbytes (Doc. outerxml );
}
Private Static string objecttosoapxml (Object O)
{
Xmlserializer myserializer = new xmlserializer (O. GetType ());
Memorystream MS = new memorystream ();
Myserializer. serialize (MS, O );
Xmldocument Doc = new xmldocument ();
Doc. loadxml (encoding. utf8.getstring (Ms. toarray ()));
If (Doc. documentelement! = NULL)
{
Return Doc. documentelement. innerxml;
}
Else
{
Return O. tostring ();
}
}
Private Static void setwebrequest (httpwebrequest request)
{
Request. Credentials = credentialcache. defaultcredentials;
Request. Timeout = 10000;
}

Private Static void writerequestdata (httpwebrequest request, byte [] data)
{
Request. contentlength = data. length;
Stream writer = request. getrequeststream ();
Writer. Write (data, 0, Data. Length );
Writer. Close ();
}

Private Static byte [] encodepars (hashtable PARS)
{< br> return encoding. utf8.getbytes (parstostring (PARs);
}

Private Static string parstostring (hashtable PARS)
{< br> stringbuilder sb = new stringbuilder ();
foreach (string K in pars. keys)
{< br> If (sb. length> 0)
{< br> Sb. append ("&");
}< br> // sb. append (httputility. urlencode (k) + "=" + httputility. urlencode (PARs [K]. tostring ();
}< br> return sb. tostring ();
}

Private Static xmldocument readxmlresponse (webresponse response)
{< br> streamreader sr = new streamreader (response. getresponsestream (), encoding. utf8);
string retxml = sr. readtoend ();
Sr. close ();
xmldocument Doc = new xmldocument ();
Doc. loadxml (retxml);
return Doc;
}

Private Static void adddelaration (xmldocument DOC)
{
Xmldeclaration Decl = Doc. createxmldeclaration ("1.0", "UTF-8", null );
Doc. insertbefore (Decl, Doc. documentelement );
}
}

 

 

Call example:

Hashtable ht = new hashtable ();
Ht. Add ("str", "test ");
Ht. Add ("B", "true ");
Xmldocument xx = websvccaller. querysoapwebservice ("Http: // localhost: 81/service. asmx"," Helloworld ", HT );
MessageBox. Show (XX. outerxml );