.net - How to obtain IServiceProvider and IMarkupServices from HTMLDocument (mshtml) -


im doing test creating instance of htmldocument way:

object[] pagetext = { "<p>some text...</p>" }; var document = new htmldocumentclass(); var document2 = (ihtmldocument2)document; document2.write(pagetext);

and need reference imarkupservices.

this code i'm using:

guid iid_imarkupservices = new guid("3050f4a0-98b5-11cf-bb82-00aa00bdce0b"); imarkupservices markupservices = getservice<imarkupservices>(document, id_imarkupservices);  static guid htmldocumentclassguid = new guid("25336920-03f9-11cf-8fd0-00aa00686f13"); private static t getservice<t>(ihtmldocument2 document, guid riid) {     var serviceprovider = (iserviceprovider) document;     object service;     serviceprovider.queryservice(ref htmldocumentclassguid, ref riid, out service);     return (t)service; }

when run (it's hosted in console app) following exception thrown:

unhandled exception: system.invalidcastexception: unable cast com object of type 'mshtml.htmldocumentclass' interface type 'iserviceprovider'. operation failed because queryinterface call on com component interface iid '{4c9a623c-ff69-3a3b-b592-43371c50df88}' failed due following error: no such interface supported (exception hresult: 0x80004002 (e_nointerface)). @ consoleapplication3.program.getservice[t](ihtmldocument2 document, guid riid) in c:\users\admin\documents\visual studio 010\projects\consoleapplication3\consoleapplication3\program.cs:line 35 @ consoleapplication3.program.main(string[] args) in c:\users\admin\documents\visual studio 2010\projects\consoleapplication3\consoleapplication3\program.cs:line 29

note: i'm trying unit test objects have implemented mshtml. when run same code in bho (within internet explorer) works fine.

thank much

edit: here´s code finaly used working

i got working inspecting following watin's implementation: http://www.java2s.com/open-source/csharp/web-testing/watin/watin/examples/mshtmlbrowser/mshtmlnativebrowser.cs.htm based on sheng jiang helpful answer.

public class program     {         [guid("7fd52380-4e07-101b-ae2d-08002b2ec713")]         [interfacetypeattribute(cominterfacetype.interfaceisiunknown)]         public interface ipersiststreaminit         {             void getclassid(out guid pclassid);             int isdirty();             void load(system.runtime.interopservices.comtypes.istream pstm);             void save(system.runtime.interopservices.comtypes.istream pstm, bool fcleardirty);             void getsizemax(out long pcbsize);             void initnew();         }          [stathread]         static void main(string[] args)         {             var anhtmldocument = new htmldocumentclass();             var apersiststream = (wb.program.ipersiststreaminit)anhtmldocument;             apersiststream.initnew();              var anhtmldocument2 = (ihtmldocument2)anhtmldocument;             anhtmldocument2.write(new object[] { "test <b> foo </b>" });             anhtmldocument2.close();              while (anhtmldocument.readystate != "complete")             {                 //this important part, without doevents() appz hangs on “loading”                 application.doevents();             }              var amarkupservice = (imarkupservices)anhtmldocument;              imarkuppointer apointer;             amarkupservice.createmarkuppointer(out apointer);              var anhtmlbody = (ihtmlbodyelement)anhtmldocument.body;             var aselection = anhtmlbody.createtextrange();             aselection.findtext("foo", 0, 0);         }     }

qi imarkupservices after loaded document via ipersiststreaminit interface, preferably url moniker proxy.


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