Re: Save a File from Variant - C / C++ / MFC Discussion Boards

David Crow5-Nov-02 9:31

5-Nov-02 9:31

Therein lies the crux of the problem: how to obtain the current character of a CEdit control? Whenever the CEdit control is updated, whether through typing, pasting, using the arrow keys or the mouse, I can't seem to find a method for knowing where the cursor currently is.

Re: CEdit question

valikac5-Nov-02 10:08

valikac

5-Nov-02 10:08

Good point. I do not think there is a get position via cursor for CEdit. One possible solution is to get the current is CEditCtrl GetCaretPos().

Kuphryn

Re: CEdit question

David Crow6-Nov-02 3:59

David Crow

6-Nov-02 3:59

Ahh, it never dawned on me to use a parent-class method. I had my blinders set on CEdit methods only. So, I was able to use something like:

pt = m_editText.GetCaretPos();<br />
x  = m_editText.CharFromPos(pt);<br />
<br />
nCharIndex = LOWORD(x);<br />
TRACE("char index = %d, ", nCharIndex);

Thanks

System Image list

Stefan Bolder5-Nov-02 5:55

Stefan Bolder

5-Nov-02 5:55

I have an explorer like app which uses the system image list with
no problems ( attach/detach etc).
Now for some of the items displayed I need to display a Custom Icon.

I tried a class I found which create an imagelist from scratch, but that goes through ALL registry entries for file extensions it can find and calls SHGetFileInfo for each of them, and then in the end I can add my own custom icons. As you can imagine: It takes forever even in a Hi-Prio thread.

I want this to work on 98 as well as 2K/Xp, and the latter don't return a filled HImagelist to which I can simply add.

What is the best way I can achieve the desired effect?

Re: System Image list

Gary R. Wheeler5-Nov-02 10:55

Gary R. Wheeler

5-Nov-02 10:55

Use ImageList_Duplicate() to make a copy of the system image list, and then use ImageList_Add() to add your custom images to the copy. Then use the copy in place of the system image list.

Software Zen: delete this;

Save a File from Variant

Jose Fco Bonnin5-Nov-02 5:40

Jose Fco Bonnin

5-Nov-02 5:40

Hello, I have an ATL object which loads a JPEG from database in a VARIANT now I need to save the variant to a file on disk. Any idea?

Thanks.

Re: Save a File from Variant

TyMatthews5-Nov-02 6:25

TyMatthews

5-Nov-02 6:25

How far have you gotten with the variant? Can you post the code you have? I have sample code that does this with ADO, but I need to know where you're at.

Ty

"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." -Albert Einstein

Re: Save a File from Variant

dabs5-Nov-02 9:07

dabs

5-Nov-02 9:07

Assuming you have the variant containing the data then this function will extract the data and put it into *ppBuf:

<br />
bool GetBinaryFromVariant( VARIANT& vData, BYTE ** ppBuf, unsigned long * pcBufLen )<br />
{<br />
	bool bReturn = false;<br />
<br />
	//Binary data is stored in the variant as an array of unsigned char<br />
	if( vData.vt == ( VT_ARRAY|VT_UI1 ) )<br />
	{<br />
		//Retrieve size of array<br />
		*pcBufLen = vData.parray->rgsabound[0].cElements;<br />
<br />
		//Allocate a buffer to store the data<br />
		*ppBuf = new BYTE[*pcBufLen]; <br />
		<br />
		if(*ppBuf != NULL)<br />
		{<br />
			void* pArrayData;<br />
			//Obtain safe pointer to the array<br />
			SafeArrayAccessData(vData.parray,&pArrayData);<br />
<br />
			//Copy the bitmap into our buffer<br />
			memcpy(*ppBuf, pArrayData, *pcBufLen);<br />
<br />
			//Unlock the variant data<br />
			SafeArrayUnaccessData(vData.parray);<br />
			bReturn = true;<br />
		}<br />
	}<br />
	<br />
	return bReturn;<br />
}<br />

Then you would use it like this - the code is from the top of my head so I'm not sure it will compile or work correctly Smile | :)

<br />
<br />
BYTE* pBuffer = NULL;<br />
UINT nBufSize = 0;<br />
if ( GetBinaryFromVariant( vtJPEG, &pBuffer, &nBufSize ) )<br />
{<br />
  //Safe the buffer to file:<br />
  CFile file;<br />
  if ( file.Open( strTheFileName, CFile::modeCreate | CFile::modeTruncate ) )<br />
  {<br />
    file.Write( pBuffer, nBufSize );<br />
  }<br />
  delete [] pBuffer;<br />
}<br />

Wenn ist das Nunstück git und Slotermeyer? Ja! Beierhund das oder die Flipperwaldt gersput!

Visual Studio Installer and drivers installation

Susy B.5-Nov-02 5:34

Susy B.

5-Nov-02 5:34

My application requires the installation
of a driver in the target machine so I have
the *.sys and the *.ini file.

I'd like to create a MSI file that automatically
installs my application and its driver.

Does someone knows in which way must I set the
Visual Studio Installer project in order to perform
the proviously defined operations ?

Thanks a lot

Please help with networking solutions

Walote5-Nov-02 5:22

Walote

5-Nov-02 5:22

On a small LAN, I must to send a Invoice number to another computer. I have tried to make a CSocket connection without good results.

I have writen a sequence als follow:

On the server: create, listen and accept (with debug, here stay still until the client send a connect message, I guess!!)

On the client: create, connect;

Then, I send on client with the send command, und the server is waiting with the receive command, but nothing comes in the *lBuf parameter.

The GetLastError show a 10022, that its something with Bind, but I have tried to put the bind command in different places (before the accept, after the accept, nothing works!!!!!!!)

And yes, I'm a newie!

Re: Please help with networking solutions

valikac5-Nov-02 8:33

valikac

5-Nov-02 8:33

I recommend Winsock Win32 API. We can help you if you ask a specific question.

Kuphryn

Serialization question

ns5-Nov-02 5:25

5-Nov-02 5:25

If I didnt decide I wanted serialization capabilities when I created the MFC app, then is it possible to change my mind later and add this feature. I saw that they put some info in step 4 advanced tab when creating the project, and it was the extension of the file that I want to associate woth my program. Since I didnt perform this step, could I fix matters by doing this association of the extension via Explorer? Or will I not be able to have serialization (projects too complex to recreate)

Appreciate your help,
ns

Re: Serialization question

Ravi Bhavnani5-Nov-02 6:06

Ravi Bhavnani

5-Nov-02 6:06

Serialization and extension association via file manager are two separate things.

You can add serialization to any app. See this[^] article for instructions.
Associations via file manager are implemented by calling CWinApp::RegisterShellFileTypes() which walks thru the list of your CDocTemplates and for each template, adds registry entries that Windows maintains for file associations.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: Serialization question

ns5-Nov-02 6:09

5-Nov-02 6:09

Wow! The articles look really interesting. Hopefully better than this book I'm reading about it. I'll be baaaack with questions from your series...........many thanks for the link.

Help with ToolTips

Aaron Schaefer5-Nov-02 5:00

Aaron Schaefer

5-Nov-02 5:00

Hi All,

I'm trying to set up tool tips on a CFormView derived view, and I am having a little bit of trouble. I've defined the following in my view class:

// In the message map
ON_NOTIFY_EX(TTN_NEEDTEXT, 0, OnToolTipNotify)

// Implementation of handler:
// Supply tool tip text when asked by Windows
BOOL CMyView::OnToolTipNotify(UINT id, NMHDR * pNMHDR, LRESULT * pResult)
{
TOOLTIPTEXT *pTTT = (TOOLTIPTEXT *)pNMHDR;
UINT nID =pNMHDR->idFrom;

TRACE("\nTTN_NEEDTEXT, idFrom = %i", nID);

if(pTTT->uFlags & TTF_IDISHWND)
{
// idFrom is actually the HWND of the tool
nID = ::GetDlgCtrlID((HWND)nID);
if(nID)
{
pTTT->lpszText = "Test";
pTTT->hinst = AfxGetResourceHandle();
return(TRUE);
}
}

// Otherwise, what?
TRACE("nHmm . . . ");
return(FALSE);
}

I am getting the HWND's for the static labels on the form, and am able to supply tooltip text for these. However, I have some ActiveX controls (afncy edit boxes), which don't have the ID_ISHWND flag set, and the ID in te NMHDR is not the ID of the control, or anything else I can tell.

Anybody have any ideas how to figure out which control sent the tooltip notification?

Thanks

GetSafeHwnd()

ns5-Nov-02 4:53

5-Nov-02 4:53

Why is

if(NULL != pView->m_list1.GetSafeHwnd())

not a good test of whether the m_list1 has "materialized" ? If I use this function in my OnInitialUpdate(), will m_list1 be existing at that point (its a control on the CFormView). Where in OnititalUpdate() can you be sure that the controls been generated? Again, does the code above presuppose that m_list1 exists?

I had thought that it would return NULL if m_list1 hadnt yet been created, but in actuality it crashes (the control in this case is being accessed from the mainframe class, and the view its on hasnt been spawned yet. I'm confused because I always thought GetSafeHwnd() was a good test to see if the control was valid yet....

Appreciate your help,
ns

Re: GetSafeHwnd()

TyMatthews5-Nov-02 6:14

TyMatthews

5-Nov-02 6:14

Your code is probably crashing NOT because of the call to GetSafeHwnd(), but rather the attempt to access the pView pointer, which is most likely invalid at the point this code is being executed. To be sure, change it to this:

if( pView != NULL )
{
    if( pView->m_list1.GetSafeHwnd() )
    {
        // do stuff
    }
}

It might help if you could explain a little about why you're trying to access the list control (on your FormView) from the mainframe class before the view is even spawned. Is this some initialization code?

Ty

"The significant problems we face cannot be solved at the same level of thinking we were at when we created them." -Albert Einstein

Re: GetSafeHwnd()

ns5-Nov-02 6:17

5-Nov-02 6:17

I just wanted to reset the view2 from view1 (clear out its controls). So if view2 is already spawned, things are good, but when view2 isnt even yet created --- I wasnt handling that correctly. The menu item doing this reset is handled by mainframe.....hope this explains my motivation...

Appreciate your help,
ns

Re: GetSafeHwnd()

Ravi Bhavnani5-Nov-02 7:32

Ravi Bhavnani

5-Nov-02 7:32

From an object oriented perspective, it's not a good idea to expose the view's members. Instead, the view should expose a public method like InitMyListCtrl() which can be called by the mainframe.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: GetSafeHwnd()

ns5-Nov-02 7:36

5-Nov-02 7:36

I know...I'm terrible. Everything is public in my stuff so I dont have to do Get and Set functions. So lazy.

BTW, I looked at your articles and got diverted to the ClassFactory link. Ugh. I have gotten away with no clue about a Factory (until now). I shall have to dive into this exotic sounding stuff now... Roll eyes | :rolleyes:

Its getting cold here - in the 70s....brrr. I already have the heat on.

Appreciate your help,
ns

Re: GetSafeHwnd()

Ravi Bhavnani5-Nov-02 7:57

Ravi Bhavnani

5-Nov-02 7:57

ns wrote:
Its getting cold here - in the 70s....brrr. I already have the heat on.
Big Grin | :-D

It's still a toasty 30F at night in Mass - I can't wait for winter to arrive. I love the cold! But then, I'm spoiled by a heated garage at home and work.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

SQL Wildcard Search

Richard Hudson5-Nov-02 4:47

Richard Hudson

5-Nov-02 4:47

Please could someone help me?
I have a SQL command which retrieves records no problem.
I can do wildcard searches with every field except my date field. What am I doing wrong?
Can someone give me some ideas or sample code.

Thankyou very much!

Re: SQL Wildcard Search

Pete Bassett5-Nov-02 5:48

Pete Bassett

5-Nov-02 5:48

Hi. Well, I've made a few assumptions in my answer.

1) you're running SQL server
2) You're trying to run a Like against your Date field.
3) Your date field is of type DateTime

Well, the docuementation for Like says

Syntax
match_expression [ NOT ] LIKE pattern [ ESCAPE escape_character ] 

Arguments
match_expression

Is any valid SQL Server expression of character string data type.
...

So, the date needs to be converted to a string before you run the like on it. You can use the CONVERT function to do that.

E.g.

--CONVERT ( data_type [ ( length ) ] , expression [ , style ] )
select CONVERT(varchar, DateField, 103 ), DateField From SourceTable

The 103 you see there is the style or datetime you want to convert to. E.g.

From MSDN

0 or 100 Default mon dd yyyy hh:miAM (or PM) 
1 or 101 USA mm/dd/yy 
2 or 102 ANSI yy.mm.dd 
3 or 103 British/French dd/mm/yy 
4 or 104 German dd.mm.yy 
5 or 105 Italian dd-mm-yy 
6 or 106 - dd mon yy 
7 or 107 - Mon dd, yy 
8 or 108 - hh:mm:ss 
9 or 109 (*)  Default + milliseconds mon dd yyyy hh:mi:ss:mmmAM (or PM) 
10 or 110 USA mm-dd-yy 
11 or 111 JAPAN yy/mm/dd 
12 or 112 ISO yymmdd 
13 or 113 (*)  Europe default + milliseconds dd mon yyyy hh:mm:ss:mmm(24h) 
14 or 114 - hh:mi:ss:mmm(24h) 
20 or 120 (*)  ODBC canonical yyyy-mm-dd hh:mi:ss(24h) 
21 or 121 (*)  ODBC canonical (with milliseconds) yyyy-mm-dd hh:mi:ss.mmm(24h) 
126(***) ISO8601 yyyy-mm-dd Thh:mm:ss:mmm(no spaces) 
130* Kuwaiti dd mon yyyy hh:mi:ss:mmmAM 
131* Kuwaiti dd/mm/yy hh:mi:ss:mmmAM 

*    The default values (style 0 or 100, 9 or 109, 13 or 113, 20 or 120, and 21 or 121) always return the century (yyyy).
** Input when converting to datetime; output when converting to character data.
*** Designed for XML use. For conversion from datetime or smalldatetime to character data, the output format is as described in the table. For conversion from float, money, or smallmoney to character data, the output is equivalent to style 2. For conversion from real to character data, the output is equivalent to style 1.

I suggest using 121 "yyyy-mm-dd hh:mi:ss.mmm" as you can get everything back.

Then run like as you want.

E.g.

select DateFieldFrom SourceTable
Where CONVERT ( varchar , DateField, 121 ) like '2002-11-05 [0-1][0-4]%'

I hope this solves you problem.

Pete

Insert Sig. Here!

Re: SQL Wildcard Search

Jon Hulatt5-Nov-02 5:43

Jon Hulatt

5-Nov-02 5:43

Please don't cross post, it simply wastes peoples time. Your identical question in the SQL forum is answered.

Signature space for rent. Apply by email to....

Re: SQL Wildcard Search

Member 15922365-Nov-02 7:53

Member 1592236

5-Nov-02 7:53

I think you should add this character before and after your string: '#'

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