Handling events from COM object without TypeLIB in C#.NET - C# Discussion Boards

use this
buttonClose.Select();
buttonClose.Focus();

sameer

hi you can try to set the tabIndex property of the button to 0 and the tabIndex property of the textbox to 1. i think this will automaticlly give the focus to the button when the form loads.

If you need any more help contact me on MSN: jamilaboukhalil@hotmail.com

Jamil Abou Khalil

Can anyone tell me why is this scenario not working?

A tabcontrol's paint event draws a rectangle and simultaneously a thread should update a label on that tabcontrol. Thread is created when the form is loaded. but its not working.....
Label is not shown untill the drawing is completed.

i cant figure out, what did i miss???

Any suggestions
Thanks in advance

-- modified at 2:37 Tuesday 17th October, 2006

Even if a separate thread is updating the label, the event for redrawing it is executed in the main thread.

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b { font-weight: normal; }

Thanks ,

but how can this be achieved. i need to do both the things in parallel,,what do u suggest?

If you draw a rectangle and then update the label, the time difference should not be noticable. Most of the time they would both be drawn within the same page refresh, so there would be no delay at all. What is is that you do that is taking time?

---
b { font-weight: normal; }

i hope this.Update(); will solve your problem

sameer

Hello, developers!

I have a problem, and i don't know how to solve it. Below i describe this situation:
I have a COM object(in C++) without TypeLIB and I there is a late bound client in C#.NET. During work
a COM object send different events to client. And i don't know, how i can recieve this events in C#. If a had a C++ client, i would write this code:

#include "stdafx.h"

#include <basetyps.h>

#include

#include

#include

#include

#include
#include
using namespace std;

_COM_SMARTPTR_TYPEDEF(IConnectionPointContainer, __uuidof(IConnectionPointContainer));

_COM_SMARTPTR_TYPEDEF(IConnectionPoint, __uuidof(IConnectionPoint));

_COM_SMARTPTR_TYPEDEF(IEnumConnectionPoints, __uuidof(IEnumConnectionPoints));

class CoFomatikEventSink : IDispatch

{
public:

enum DISPIDS
{
DISPID_OnStateChanged = 1,
DISPID_OnProgressChanged,
};

STDMETHODIMP_(ULONG) AddRef();

STDMETHODIMP_(ULONG) Release();

STDMETHODIMP QueryInterface(REFIID riid, void** ppv);

STDMETHODIMP GetTypeInfoCount(UINT *pctinfo);

STDMETHODIMP GetTypeInfo(UINT iTInfo, LCID lcid, ITypeInfo **ppTInfo);

STDMETHODIMP GetIDsOfNames(REFIID riid, LPOLESTR *rgszNames, UINT cNames, LCID lcid, DISPID *rgDispId);

STDMETHODIMP Invoke(DISPID dispIdMember, REFIID riid, LCID lcid, WORD wFlags, DISPPARAMS *pDispParams, VARIANT *pVarResult, EXCEPINFO *pExcepInfo, UINT *puArgErr);

CoFomatikEventSink() : cookie(0), refCount(1) {}
~CoFomatikEventSink() { Disconnect(); }

bool Connect(IUnknownPtr object);
bool Disconnect();

// Event Handlers
void OnStateChanged(IUnknownPtr state);
void OnProgressChanged(UINT value, const BSTR text);

private:
IConnectionPointPtr defaultConnectionPoint;
ULONG cookie;
ULONG refCount;
};

STDMETHODIMP_(ULONG) CoFomatikEventSink::AddRef(void)
{
return ++refCount;
}

STDMETHODIMP_(ULONG) CoFomatikEventSink::Release(void)
{
if(--refCount == 0)
{
delete this;
return 0;
}
return refCount;
}

STDMETHODIMP CoFomatikEventSink::QueryInterface(REFIID riid, void** ppv)
{
if(riid == IID_IUnknown)
*ppv = (IUnknown*)this;
else
if(riid == IID_IDispatch)
*ppv = (IDispatch*)this;
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
((IUnknown*)(*ppv))->AddRef();
return S_OK;
}

STDMETHODIMP CoFomatikEventSink::GetTypeInfoCount(UINT *pctinfo)
{
*pctinfo = 0;
return S_OK;
}

STDMETHODIMP CoFomatikEventSink::GetTypeInfo(UINT iTInfo, LCID lcid, ITypeInfo **ppTInfo)
{
*ppTInfo = NULL;
return E_NOTIMPL;
}

STDMETHODIMP CoFomatikEventSink::GetIDsOfNames(REFIID riid, LPOLESTR *rgszNames, UINT cNames, LCID lcid, DISPID *rgDispId)
{
for(UINT i = 0; i < cNames; ++i)
{
if(_wcsicmp(rgszNames[i], OLESTR("OnStateChanged")) == 0)
{
rgDispId[i] = DISPID_OnStateChanged;
}
else
if(_wcsicmp(rgszNames[i], OLESTR("OnProgressChanged")) == 0)
{
rgDispId[i] = DISPID_OnProgressChanged;
}
else
return DISP_E_UNKNOWNNAME;
}
return S_OK;
}

STDMETHODIMP CoFomatikEventSink::Invoke(DISPID dispIdMember, REFIID riid, LCID lcid, WORD wFlags,

DISPPARAMS *pDispParams, VARIANT *pVarResult, EXCEPINFO *pExcepInfo, UINT *puArgErr)
{
switch(dispIdMember)
{
case DISPID_OnStateChanged:
{
if(pDispParams -> cArgs == 1)
{
OnStateChanged(pDispParams->rgvarg[0].punkVal);
return S_OK;
}
}
break;

case DISPID_OnProgressChanged:
{
if(pDispParams -> cArgs == 2)
{
OnProgressChanged(pDispParams->rgvarg[0].uintVal,pDispParams->rgvarg[1].bstrVal);
return S_OK;
}
}
break;
}
return DISP_E_UNKNOWNINTERFACE;
}

bool CoFomatikEventSink::Connect(IUnknownPtr object)
{
IConnectionPointContainerPtr connectionPointContainer = object;
IEnumConnectionPointsPtr enumConnectionPoints;
ULONG numConnectionPoints = 0;
connectionPointContainer->EnumConnectionPoints(&enumConnectionPoints);
if(enumConnectionPoints->Next(1, &defaultConnectionPoint, &numConnectionPoints ) == S_OK)
{
if(defaultConnectionPoint->Advise(this, &cookie) == S_OK)
{
cout<<cookie<<endl;
return true;
}
defaultconnectionpoint="NULL;
cookie" =="" 0;=""
}
return="" false;
}

bool="" cofomatikeventsink::disconnect()
{
if(cookie)
{
defaultconnectionpoint-="">Unadvise(cookie);
defaultConnectionPoint = NULL;
cookie = 0;
}
return true;
}

void CoFomatikEventSink::OnStateChanged(IUnknownPtr state)
{
/* OnStateChanged handler HERE */
}

void CoFomatikEventSink::OnProgressChanged(UINT value, const BSTR text)
{
/* OnProgressChanged handler HERE */
}

// ===========================================================================
int main(int argc, _TCHAR* argv[])
{
::CoInitialize(NULL);
{
IUnknownPtr fomatik;
fomatik.CreateInstance("MyCOM.Application");
CoFomatikEventSink* ev = new CoFomatikEventSink();
ev->Connect(fomatik);
ev->Release();
}
::CoUninitialize();
}

But i don't know how i can implement IDispatch in C#? Yes, i know, that RCW and CCW do all work to marshal parameters and call functions, and implement IUnknown and IDispatch, but in my application it is neccesary to implement IDispatch myself, because i don't have a TypeLIB for COM object and that's way i can't cache DispIDs from another source.. I have been trying to write this event handler already 3 days, but unsuccessful!!!!
Plese, if anybody know how to solve this problem, help!

Big, hearty thanks in advance!!!!

Hello all,
I want to Compress folder by Icshorp library.
I search this help, but not found any sample.
Now, I want some sample of Compress Folder(no a file)

hi all
have created a groovy c# app in c# express edition 2005.

I see that i can create an installer - "publish" option

can i just make a stand alone statically built .exe file which doesnt need an installer?
if so, how do i go about it ?

cheers and thanks

Bryce

---
To paraphrase Fred Dagg - the views expressed in this post are bloody good ones.
--

Publitor, making Pubmed easy.
http://www.sohocode.com/publitor

Our kids books :The Snot Goblin, and Book 2 - the Snotgoblin and Fluff

Build a release version and goto the bin/release directory and the .exe file there is the file you need.

The only way to speed up a Macintosh computer is at 9.8 m/sec/sec.

dear programmers
i have made a help file contains many topics. i have a application contains forms when user press F1 then respective form help to be shown
i am using

Help.ShowHelp(this,"c:/help.hlp","Form1");
but is not working not giving any error
only simply
Help.ShowHelp(this,"c:/help.hlp");
is showing the help which is not required..
if any body have done before plz forward

sikandar

Hi how can i get the list of all databases in Oracle 9. Can anybody help me please???

regards

sAqIb

Oracle 9i is one data base what are u talking about plz clear ur question.

there are users which are connected through it

sikandar

i meant to ask the list of databases in oracle 9. like we have a database 'Northwind', then we have another database 'Test1', then another database 'Test2' etc. so i want to get the list containing names of these databases.

regards

sAqIb

sorry i got wrong.

sikandar

Hi everyone,
In my page am using an image button.In that how can i get the change of backcolor continuously.Looking for ur help.
Thanks in advance.

Thanks,
Mirunab

Your question is not very clear... Do you mean a change over time, or do you mean a gradient? Do you want to monitor changes, or do you want to do the changes?

---
b { font-weight: normal; }

yes, I meant a change over a time.
If am using an image with a background color as "aqua" after 30 secs, I have to change the backcolor as "Dark blue" by using webControls, this action to alternate for every 30 secs. Waiting for a solution.
Thanks in Advance.

Thanks,
Mirunab

I would be very apprciative if someone could help me .

i would like to be able to loop through all the columns in a dataset datatable , get a sum of the value in the column .
Then if this is zero, I would like to delete the column.

Thanks in advance

you can use

grid[row,col]

count the sum
if ur are using dataTable as datatable
then if sum is zere
delet column form dataTable,

sikandar

I am making a map editor for a game and have a ton of picture boxes that are set to different images to make the map tiles. Once I make the map I have a method that begins to save the map and all of its information. How do I get the unique image information from these picture boxes(image name, image path, ect.)?

Thanks in advance!

The only way to speed up a Macintosh computer is at 9.8 m/sec/sec.

Hi!

Is it possible to send a search string using C# to the search field in the Vista start menu?

Thanks!
J-K

Well i've been making an app in .net 2.0 with sharpdevelop - but ive been making sure to only use things available to .net 1.1

I like the way all the designer code goes in a seperate file, anyways, i go to compile it with .net 1.1 and it doesn't like all of this partial class nonsense. SO rather than ME combining the two files for each form, is there somehting that will do it for me?

Partial class just tells the compiler to include that source with the rest of it.

If you want to compile in .net 1.1 just combine all the partial classes into one class, in one file.