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This question shows you don't understand COM properly: you can't return a std::map from a COM interface method.
Steve
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To expand (slightly) on what Stephen's said - you can't return a std::map from a COM object. Instead, you would probably return an IEnumXXXX interface that allowed the user of your object to iterate over the map contents (see this article[^] for more details).
However, I would suggest you get comfortable with COM & ATL first before trying a more advanced topic like this
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Thanks for help,
I found the following article on MSDN about collections
http://msdn.microsoft.com/en-us/library/3stwxh95(VS.71).aspx
and tried. All works fine.
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How about returning the value as one of the out parameter...
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Hi all,
How to I create a Check List Box? I need to create it without the column just a list of items. What do I need to create? What else should I know?
I tried this one but it is not exactly what I need
http://69.10.233.10/KB/wtl/wtl4mfc5.aspx[^]
Thanks,
Jayjay
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Use List Control
Make a List control object say m_list and set extendedstyle like below
m_list.SetExtendedStyle(LVS_EX_CHECKBOXES);
This will work for you..
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Thanks!!!
ill try that now
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I tried your suggestion however I cant see the checkboxes
This is what I did
CListViewCtrl DownloadList;
DownloadList.Attach(GetDlgItem(IDC_DOWNLOADLIST));
DownloadList.SetExtendedListViewStyle(LVS_EX_CHECKBOXES);
DownloadList.InsertItem ( 0, _T("text1") );
DownloadList.InsertItem ( 1, _T("text2") );
DownloadList.InsertItem ( 2, _T("text3") );
.
Is there anything I lack?
Thanks
modified on Wednesday, June 18, 2008 10:40 PM
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Might be a stretch....but is ICC_LISTVIEW_CLASSES in your call to InitCommonControls?
- S
50 cups of coffee and you know it's on!
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do you mean this?
WINCOMMCTRLAPI void WINAPI InitCommonControls(void);
#if (_WIN32_IE >= 0x0300)
typedef struct tagINITCOMMONCONTROLSEX {
DWORD dwSize;
DWORD dwICC;
} INITCOMMONCONTROLSEX, *LPINITCOMMONCONTROLSEX;
#define ICC_LISTVIEW_CLASSES 0x00000001 // listview, header
What must I do Steve?
Thanks
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I got it now i really have to insert column first
DownloadList.InsertColumn (
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I am trying to create an Ole DB Consumer in order to access data from a table for a conduit application. The problem is that whenever I use the wizard to generate the code it does not generate the data members needed to correspond to the columns of the table I wish to work with.
Do yo have any idea why this would happen?
I can show you an example I saw on another website. Using the wizard with a table called Authors generates the code:
// code generated on Wednesday, April 17, 2002, 10:25 AM
class CAuthorsAccessor
{
public:
LONG m_Au_ID;
TCHAR m_Author[51];
SHORT m_YearBorn;
DBSTATUS m_dwAu_IDStatus;
DBSTATUS m_dwAuthorStatus;
DBSTATUS m_dwYearBornStatus;
DBLENGTH m_dwAu_IDLength;
DBLENGTH m_dwAuthorLength;
DBLENGTH m_dwYearBornLength;
void GetRowsetProperties(CDBPropSet* pPropSet)
{
pPropSet->AddProperty(DBPROP_CANFETCHBACKWARDS,
true, DBPROPOPTIONS_OPTIONAL);
pPropSet->AddProperty(DBPROP_CANSCROLLBACKWARDS,
true, DBPROPOPTIONS_OPTIONAL);
pPropSet->AddProperty(DBPROP_IRowsetChange,
true, DBPROPOPTIONS_OPTIONAL);
pPropSet->AddProperty(DBPROP_UPDATABILITY,
DBPROPVAL_UP_CHANGE | DBPROPVAL_UP_INSERT
| DBPROPVAL_UP_DELETE);
}
HRESULT OpenDataSource()
{
CDataSource _db;
HRESULT hr;
if (FAILED(hr))
{
#ifdef _DEBUG
AtlTraceErrorRecords(hr);
#endif
return hr;
}
return m_session.Open(_db);
}
void CloseDataSource()
{
m_session.Close();
}
operator const CSession&()
{
return m_session;
}
CSession m_session;
DEFINE_COMMAND_EX(CAuthorsAccessor, L" \
SELECT \
Au_ID, \
Author, \
'Year Born' \
FROM Authors")
BEGIN_COLUMN_MAP(CAuthorsAccessor)
COLUMN_ENTRY_LENGTH_STATUS(1, m_Au_ID,
m_dwAu_IDLength, m_dwAu_IDStatus)
COLUMN_ENTRY_LENGTH_STATUS(2,
m_Author, m_dwAuthorLength, m_dwAuthorStatus)
COLUMN_ENTRY_LENGTH_STATUS(3,
m_YearBorn, m_dwYearBornLength, m_dwYearBornStatus)
END_COLUMN_MAP()
};
Notice the data members I have highlighted with bold? Those are each columns of the table Authors.
When working with my Table, which is called TABLE-CAREER-INTAKE this code is generated:
class CTABLECAREERINTAKE4Accessor
{
public:
void GetRowsetProperties(CDBPropSet* pPropSet)
{
pPropSet->AddProperty(DBPROP_CANFETCHBACKWARDS, true, DBPROPOPTIONS_OPTIONAL);
pPropSet->AddProperty(DBPROP_CANSCROLLBACKWARDS, true, DBPROPOPTIONS_OPTIONAL);
pPropSet->AddProperty(DBPROP_IRowsetChange, true, DBPROPOPTIONS_OPTIONAL);
pPropSet->AddProperty(DBPROP_UPDATABILITY, DBPROPVAL_UP_CHANGE | DBPROPVAL_UP_INSERT | DBPROPVAL_UP_DELETE);
}
HRESULT OpenDataSource()
{
CDataSource _db;
HRESULT hr;
hr = _db.OpenFromInitializationString(L"Provider=Microsoft.Jet.OLEDB.4.0;User ID=Admin;Data Source=P:\\CareerDb\\db1.mdb;Mode=Share Deny None;Extended Properties=\"\";Jet OLEDB:System database=\"\";Jet OLEDB:Registry Path=\"\";Jet OLEDB:Database Password=\"\";Jet OLEDB:Engine Type=5;Jet OLEDB:Database Locking Mode=1;Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Global Bulk Transactions=1;Jet OLEDB:New Database Password=\"\";Jet OLEDB:Create System Database=False;Jet OLEDB:Encrypt Database=False;Jet OLEDB:Don't Copy Locale on Compact=False;Jet OLEDB:Compact Without Replica Repair=False;Jet OLEDB:SFP=False");
if (FAILED(hr))
{
#ifdef _DEBUG
AtlTraceErrorRecords(hr);
#endif
return hr;
}
return m_session.Open(_db);
}
void CloseDataSource()
{
m_session.Close();
}
operator const CSession&()
{
return m_session;
}
CSession m_session;
BEGIN_COLUMN_MAP(CTABLECAREERINTAKE4Accessor)
END_COLUMN_MAP()
};
There are no such data members, despite the fact that my table has about 12 or so columns for each row.
Any ideas?
Sorry if there is an article or thread on this but I searched and could not find any.
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I had the same problem when trying to use Ole DB in a ATL application. The wizard would not generate any columns. I never determined what caused the problem. I eventually had to reinstall VS 2005 and it started working.
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hello, everyone:
I want to operate files without MFC. Exactly speaking, i want to read and write files only with windows standard library. now i dont know how to implement the function of CStdioFile::WriteLine() of MFC with STL,is there anyone could help me?anything will be appreciated,thanks in advance~
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I suspect you are referring to CStdioFile::WriteString() and not WriteLine(). All you have to make sure is that single new lines (\n) are converted to carriage return and new line (\r\n). I would imagine that the std::fstream class handles this automatically, assuming the file was opened in text mode.
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Thank u for your reply~  std::fstream really helps me.
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Is it possible to write find_if somehow if
class CMyClass
{
public:
CMyClass(int _x):m_id(_x) {}
int id() {return m_id;}
int m_id;
}
std::vector<cmyclass*> myVector;
myVector.push_back(new CMyClass(10));
myVector.push_back(new CMyClass(13));</cmyclass*>
I want to find object in vector which has id 13. How to write finder, something like this:
std::find_if(myVector.begin(), myVector.end(), bind2nd(equal_to<int>(), 13));
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Something like this is the way I'd do it:
#include "stdafx.h"
#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
using namespace std;
class MyData
{
public:
MyData(int id =0) : m_id(id) {};
int id() const
{
return m_id;
}
class IdEquals : public unary_function<MyData, bool>
{
public:
IdEquals(int id) : m_id(id) {}
bool operator()(const MyData &data) const
{
return data.id() == m_id;
}
private:
int m_id;
};
private:
int m_id;
};
int main()
{
typedef vector<MyData> Coll_t;
Coll_t data;
data.push_back(MyData(1));
data.push_back(MyData(3));
data.push_back(MyData(5));
Coll_t::const_iterator i = find_if(data.begin(), data.end(), MyData::IdEquals(2));
if (i != data.end())
{
cout << "2 found." << endl;
}
else
{
cout << "2 NOT found!" << endl;
}
i = find_if(data.begin(), data.end(), MyData::IdEquals(3));
if (i != data.end())
{
cout << "3 found." << endl;
}
else
{
cout << "3 NOT found!" << endl;
}
return 0;
}
Steve
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I'd use Boost.Lambda[^]:
#include <boost/lambda/lambda.hpp>
#include <boost/lambda/bind.hpp>
using namespace boost::lambda;
std::find_if(myVector.begin(), myVector.end(), bind(&CMyClass::id, _1) == 13);
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You should be able to do that with bind2nd if you add an operator=(int) to CMyClass.
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I considered that approach but decided against it since he only wants to search keyed on one member.
Steve
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Sometimes I'm using operators to solve such issues:
class CMyClass
{
...
operator TType() const {return m_type;}
...
}
remove_if(begin(), end(), bind2nd(equal_to<CMyClass::TType>(), 999)
and was wondering is there another solution, without additional comparators or operators.
PS thank you for pointing me to the right direction 
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I want to write a ActiveX control for word, which has the transparent effect,which can't envelop the test in word document no matter what drawn in the control. But I don't know how to achieve the transparent effect. My English is poor. I hope you can follow me and can help me
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Ni Hao,
To draw your control as transparent must Override the OnDraw() of the ActiveX.
If you Do nothing there the control will never be written ad you should see what lies bellow it.
Also you could use the function TransparentBlt() to draw any overlay you want.
A third option could be capturing the screen below the control an drawing it (for avoiding the .
HRESULT CCAxQuantMaster::OnDraw(ATL_DRAWINFO& di)
{
RECT& rc = *(RECT*)di.prcBounds;
// Set Clip region to the rectangle specified by di.prcBounds
HRGN hRgnOld = NULL;
if (GetClipRgn(di.hdcDraw, hRgnOld) != 1)
hRgnOld = NULL;
bool bSelectOldRgn = false;
HRGN hRgnNew = CreateRectRgn(rc.left, rc.top, rc.right, rc.bottom);
if (hRgnNew != NULL)
{
bSelectOldRgn = (SelectClipRgn(di.hdcDraw, hRgnNew) != ERROR);
}
//Select Transparent Brush
SelectObject(di.hdcDraw, GetStockObject(NULL_BRUSH));
Rectangle(di.hdcDraw, rc.left, rc.top, rc.right, rc.bottom);
}
JO
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