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I developed a windows service which was written in VC++ (6.0) earlier and was directly migrated to VS2008 (C++).
The migrated service works fine in Windows 2000 Server but gives access violation exceptions when started in Windows Server 2003 and Windows XP system.
Is there some thing different in Windows 2003 server with respect to windows 2000?
Do I need to make some settings for this to make work?
With Regards,
Abraham Jose
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Did you run it in the debugger to find out what the exceptions are?
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After converting project from VC6.0 to VS2008,while running application it shows the following error
Unhandled exception at 0x787ac40c (mfc90d.dll) in CS3OperatorStation.exe: 0xC0000005: Access violation reading location 0x00000020.
When i debug it,i got this error in this particular line
void tSendActiveData()
{
while(1)
{
AfxGetMainWnd()->SendMessage(WM_COMMAND,ID_SENDACTIVEDATA,NULL); Sleep(500);
}
}
tSendActiveData is a thread.
I want to invoke this fucntion in this thread.thts why im using it.
Its working fine in VC6.0 version.
Anu
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You shouldn't do this. You should post a message to the main thread, using global namespace's PostMessage [^] with target the main window handle (you may pass it to the worker thread).
See this article [^] on how to use worker threads (read carefully the "Worker Threads and the GUI IV: AfxGetMainWnd" section).
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Please check the return value of AfxGetMainWnd(). This function is supposed to return the main windows associated with the thread. As your thread does not have a window, the return value might be zero.
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Me think that AfxGetMainWnd() will return the window of the thread, not of the main application.
Pass a pointer of your main application window to your thread.
Max.
This signature was proudly tested on animals.
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Hint: the thread function has a parameter... 
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Now im converting VC+.0 project in to VS2008 version.
It shows error on line
RFile.open(FName,ios::app,filebuf::sh_read);
as sh_read: Undeclared identifier
I included #include<fstream>,Using Namespace std;
But no use.It contniously show this error.
i declared RFile in header file as
class StreamOut : public ofstream
{
public:
StreamOut()
{
}
};
StreamOut RFile;
Im using RFile to Write also as
RFile.write(PageNo,2);
.
.
But it shows error on sh-read.
Anyother way to do this?
Anu
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Did you forget to mention the namespace std?
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Yes, i included.
Now i change the fucntion as follow
RFile.open(FName,ios::app);
Now i doenot show error.I dont know its correct or not.
Anu
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error C2487: 'CSingleton<T>::ms_pSingleton' : member of dll interface class may not be declared with dll interface
When I try to compile the below code in VS2008 above is the error. I am not sure hw to fix this, as the class is not exported (i am getting this error even when i try to export the member alone).
So please suggest me a better solution.
template <typename T>
class CSingleton
{
private:
ExportSlotCoreLib static T* ms_pSingleton;
CSingleton(const CSingleton&);
protected:
CSingleton() {
//assert(ms_pSingleton == NULL);
int offset = (char*)(T*)1 - (char*)(CSingleton <T>*)(T*)1;
ms_pSingleton = reinterpret_cast<T*>(reinterpret_cast<char*>(this) + offset);
}
~CSingleton() {
//assert(ms_pSingleton != NULL);
ms_pSingleton = NULL;
}
public:
static T& GetSingleton() {
return (T&)*ms_pSingleton;
}
static T* GetSingletonPtr() {
return ms_pSingleton;
}
};
Thanks,
Nandu
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Can you remove ExportSlotCoreLib from pSingleton declaration and try?
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Hi All
USE database command is not working for me.I was asking same question in last week but still i have no solution then i ask one more time.Plz help me
connection code is here
CString str1="",str2="",str3="";
HRESULT hr;
if SUCCEEDED(hr = CoInitialize(NULL))
{
try
{
if (SUCCEEDED(spSQLServer.CreateInstance(__uuidof(SQLServer2))))
{
try
{
HOST=(_bstr_t)m_MHOST;
if(rad1.GetCheck())
{
spSQLServer->LoginSecure = TRUE;
spSQLServer->Connect((_bstr_t)m_MHOST);
}
else
{
spSQLServer->LoginSecure = FALSE;
spSQLServer->Connect((_bstr_t)m_MHOST,(_bstr_t)m_MUSR,(_bstr_t)m_MPWD);
}
}
catch(_com_error pCE)
{
str2.Format(_T("%s"),
MessageBox(str2,"Message");
return TRUE;
}
}
else
{
str3.Format(_T("Unable to create the SQL Server object.\n"));
}
}
catch(_com_error pCE)
{
str2.Format(_T("\n%s Error: %ld\r\n%s\r\n%s\r\n"),
(TCHAR*)pCE.Source(),
pCE.Error(),
(TCHAR*)pCE.Description(),
(TCHAR*)pCE.ErrorMessage());
}
}
else
{
str2.Format(_T("Call to CoInitialize failed.\n"));
}
Use database command code is here
QueryResultsPtr Qry;
_SQLServer2Ptr spSQLServer;
CString udata="use 'databasename'";
Qry=spSQLServer->ExecuteWithResults((_bstr_t)udata,(LONG)udata.GetLength());
Select command is running fine like this
CString sel="select * from 'Database name'.dbo.'Table Name'"
Qry=spSQLServer->ExecuteWithResults((_bstr_t)sel,(LONG)sel.GetLength());
Can any one help me why
USE 'Database name' not working.
Plz help me
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MsmVc wrote: USE database command is not working for me.
-explain, does it give an error, does it simply not do what is expected (e.g: it completes successfully but does not seem to make any change), how do you know it fails?
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <
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it completes successfully but does not seem to make any change.
After use database command then i check through this command.
SELECT DB_NAME() AS DataBaseName
it's always show "Master" database name.
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Let's experiment, try this:
CString udata="use \"databasename\"";
Qry=spSQLServer->ExecuteWithResults((_bstr_t)udata,(LONG)udata.GetLength());
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <
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thanks ,i use code which is given by you.But i got error
Microsoft SQL-DMO (ODBC SQLState: 42000) Error: -2147221402 [Microsoft][ODBC SQL Server Driver][SQL Server]Incorrect syntax near 'databasename'. Invalid STDGMEDIUM structure
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How about CString udata="use databasename"; ? Btw do you know that -according to msdn- Microsoft recommends not using sql-dmo in newer products because it will be removed by them?
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <
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thanks for information.
So what i use?Plz help me
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This[^] is where i found that you should avoid using it, just to show you i didn't make that up. Otherwise, i don't know what else there is, i guess you should ask Microsoft (look around MSDN), or you could try using Oracle Database 10g client[^], i think it is an ODBC "interface" of somesort...
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <
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Your database's name is
Database name ?
in such a case, possibly you've to replace
MsmVc wrote: CString udata="use 'databasename'";
with
CString udata="use 'Database name'";
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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i always use like this
CString udata="use 'Database name'";
But still i have problem same.
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uhm,
I think: the USE keyword (in t-sql) follow by YourDBName (YourDBName without quote) like this
USE YourBDName
or
USE [YourBDName]
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Thank
But i test both case there is no effect in out put.Still same problem here.
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