ActiveX excel aquisition

Hello,
I am trying to aquire data straight into excel using active X. I found a sample code below that will do exactly what I want. It generates random data and writes it to excel on demand by user selecting a button. The data it writes now is just random data. I added a DAQ with 6 channels that will aquire one sample on demand which is what I want, and I would like to write this data into excel instead of the random data. I tried replacing the random data by the DAQ data using a conversion from DDT, but then the loop indexing does not work, and it would not let me disable indexing. I am sure this is a simple solution and I would like your help.
Cheers,
Alloush
Attachments:
Excel Write to Active Cell Example Aquire.vi ‏144 KB
write_to_active_cell.llb ‏175 KB

The random data you are generating is a 2 dimensional array of floating point numbers, the data coming out of your DAQ is a 1 dimension array of floating point numbers.
That is why your for loops aren't indexing properly. If you only want to acquire one column of data, insert a 'build array' function to add a dimension to your 1D array of data.
If you want to add a new set of captured data each time you press the 'Write to active cell' button you will need to store the last row or column index and add it too the row or column value you started with.
Troy
CLDEach snowflake in an avalanche pleads not guilty. - Stanislaw J. Lec
I haven't failed, I've found 10,000 ways that don't work - Thomas Edison
Beware of the man who won't be bothered with details. - William Feather
The greatest of faults is to be conscious of none. - Thomas Carlyle

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Using vlookup btwn worksheets when using ActiveX Excel

I am having problems using the vlookup function in Excel. It works fine if I have the lookup table on the same worksheet that's already open in LabVIEW. I first open an excel file that I use as a template. I copy the header and formula information from that file into an activeX container containing an Excel worksheet. I then allow the analyst to enter data into the ActiveX Excel spreadsheet. Meanwhile, I create a log template by creating a text file with headers. When the analyst is done entering data on the front panel, they click on the Update/Print Label button. This appends their data (a range of cells) to the text file (which is then formatted and saved using report generation tools) and it's printed to a label. The problem is on the front panel ActiveX Excel sheet. The original excel sheet used as a template has many formulas, all of which work well in Excel, as well as in the LabVIEW app, with one notable exception. One of the cells contains a formula that uses a vlookup function. The problem is when I place that lookup table on a different worksheet. It works great if I place the lookup table on the same sheet as the template, but when I try to reference a different sheet, I get an error. I'm assuming that I just need to add code to open the second Excel spreadsheet (or better yet - a separate workBOOK). I was confused at first, because the vlookup function worked fine in Excel, but not in LabVIEW. Then I realized that Excel already had all the worksheets in the workbook open, but LabVIEW does not. Am I correct? If I want to use a vlookup to look on another worksheet or another workbook, do I just have to open that second workbook/sheet in LabVIEW?

Hi Dan,
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Nick Keel
Applications Engineering
National Instruments
Nick Keel
Product Manager - NI VeriStand and Model Interface Toolkit
National Instruments

ActiveX Excel Prevent Open File While Writting

I'm having some of the same problems with Excel and ActiveX found here:
http://forums.ni.com/ni/board/message?board.id=170&message.id=254019&view=by_date_ascending&page=1
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Activex Excel Automation: the Missing Handle

Once upon a time there was a piece of legacy code, working well. It would open Excel workbooks, add data, and make it look nice.
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Attachments:
Fun with references.png ‏59 KB

I"ve moved all the CR's to the end of the VI. The problem persists. Look at the examples? Are you toying with me?
Attachments:
test.vi ‏16 KB

ActiveX- Excel- Adding top and bottom border

Hi,
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Attachments:
Open_New_WorkSheet.vi ‏44 KB
Set_cell_border.vi ‏52 KB

You do not need to use the style or the selection property to apply the borders to specific edges of the range. Just use the Item Method to specify which one you want to modify.
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Property Range->Borders
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Property Border->Weight = xlThin
Attached is you VI modified as described.
Michael Munroe
Certified LabVIEW Developer
www.abcdef.biz
Michael Munroe, ABCDEF
Certified LabVIEW Developer, MCP
Find and fix bad VI Properties with Property Inspector
Attachments:
Set_cell_border_abcdef.vi ‏51 KB

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J'utiise une version 6.1

Bonjour,
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Cordialement,
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ActiveX Excel Workbook Close won't save

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http://msdn.microsoft.com/en-us/library/bb241584(v=office.12).aspx
http://msdn.microsoft.com/en-us/library/microsoft.office.tools.excel.workbook.close(v=vs.80).aspx
http://msdn.microsoft.com/en-us/library/microsoft.office.tools.excel.workbook.saveas(v=vs.80).aspx
CLA, LabVIEW Versions 2010-2013
Solved!
Go to Solution.

Workbook was corrupt. Solution was to recreate.
CLA, LabVIEW Versions 2010-2013

Conteneur ActiveX Excel sous vista

Bonjour,
Sous XP il est possible d'intégrer dans un conteneur Active X une feuille excel 2003. Malheureusement il semble que sous VISTA avec Excel 2007 il y ai eu quelques changements. Est ce que quelqu'un connaitrait le nom de l'ActiveX qui a remplacé le "Microsoft Office Spreadsheet".
Merci
Sebastien DEVISSCHER - Nerys

Bonjour,
Merci d'avoir posté sur les forums NI.
Si je comprends votre problème, vous souhaitez visualiser une feuille de calcul sur une FA.
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L'exemple joint ouvre un fichier excel correctement, même 2007. Par contre n'ayant pas accès tout de suite à un PC avec Vista/Seven, je n'ai pas pu tester la compatibilité avec l'OS.
Cordialement,
Eric M. - Application Engineering Specialist
Certified LabVIEW Architect
Certified LabWindows™/CVI Developer
Pièces jointes :
Read_Excel.vi ‏24 KB

Essbase with ActiveX Excel Session?

Does anybody know if there are limitations with the Add-in and an Active X excel session?

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ActiveX Excel Reading only problem

Hi all,
I have a problem with my program when i write data in excel.
In a while loop, i write data in a worksheet and i close reference only at the end of acquisition.
If the user, for example, scroll with his mouse exatly at the moment the data is writing, the data is not writing !
How i can solve my problem, put the worksheet in "reading only"? but there is always the scroll problem...
If you have idea.
Thanks
Message Edité par kriss00 le 06-29-2009 04:28 AM

If it is not necessary to have Excel visible during the data writing process, set the Visible option of the application to FALSE.
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CLD | CTD
LabVIEW 2011 SP1 | TestStand 4.5

Problem with ActiveX / Excel / LV7.1 in program which worked on an older LV7.1 installation...

Hi,
I have a LV7.1 program which worked when ran on an older LV7.1 installation.
I installed Office XP and LV7.1 and can open the program with no problems. After opening I ctrl+shift+click the run button to force a recompile and the arrow becomes broken.
All the errors I have found are the same: Invoke Node contains unwired or bad terminal.
Below is a screenshot of one of the erroneous block diagrams. I am hoping the error is recognizable.
The only two issues I can think of are:
1. I am running Windows 7- perhaps the ActiveX does not work the same way? I am currently installing Windows XP to see if this corrects the problem.
2. Perhaps there was an Office toolkit or something used along with LV7.1 to create this program? If so, any ideas on what it was and where I can get a hold of it?
Thanks,
Dave
Solved!
Go to Solution.

Thanks Bob. Yes, the invoke node in the picture was the one throwing the error.
I know next to nothing about ActiveX. I right clicked the refnum control on the front panel and created a new invoke node on the block diagram (wasn't sure exactly how to link to the existing invoke node). I rewired all the old connections and deleted the old invoke node. Seems to have taken care of the problem.
Would the object model mismatch been caused by different versions of Offie being installed? I was thinking about trying Office 97 as well but if rewiring fixes all the problems I guess I won't need to.
Thanks again,
Dave

How to make an array with ActiveX Excel using Excel_RangeSetValue2?

Hello,
I want to make an array on Excel. For that, I'm using two functions : Excel_WorksheetGetRange and Excel_RangeSetValue2.
I write the array on Excel file but only the first case of the array is copied.
Here, a part of my program :
char * DataToWrite = {"A", "B", "C", "D"}
char cCell[10];
VARIANT             vCell, Data;
ExcelObj_Worksheet hWorksheet;
ExcelObj_Range      hRange;
CA_VariantSetCString (&vCell,cCell);        //cCell = A1:A4
Excel_WorksheetGetRange (hWorksheet, NULL, vCell, CA_DEFAULT_VAL, &hRange);
  CA_VariantSetCString (&Data,DataToWrite );
  Excel_RangeSetValue2 (hRange, NULL, Data);
Here what I obtain when I'm compiling on Excel file :
A
A
A
A
Solved!
Go to Solution.

You should use other instructions to fill the range of cells:
strcpy (msg, "A1:A4");
CA_VariantSetCString (&MyVariant, msg);
Excel_WorksheetRange (ExcelWorksheetHandle, NULL, MyVariant, CA_DEFAULT_VAL, &ExcelRangeHandle);
Excel_RangeActivate (ExcelRangeHandle, NULL, NULL);
// Create a SafeArray from array of data
CA_VariantSet2DArray (&MyVariant, CAVT_CSTRING, righe, 1, array);
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Excel_SetProperty (ExcelRangeHandle, NULL, Excel_RangeValue2, CAVT_VARIANT, MyVariant);
ClearObjHandle (ExcelRangeHandle);
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My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

How to list all currently open Excel files with ActiveX?

Hello all!
I would like to program with ActiveX a way to retrieve a list (array of strings) of the filenames of the currently opened Excel files in windows. However, I am fairly new to the ActiveX/Excel business in LV and after hours looking at the "millions" of objects in the property nodes I give up and hope some kind soul here can help me. I couldn't find any information in this forum regarding the same issue, although some were close
I am using LV 7.1 without the Report Generation Toolkit.
Thanks!
/Goran

Hi KC,
thanks for your reply. I have in fact been able to find the desired things in the ActiveX properties/methods for Excel in LabView. It took me some looong work going through the functions which I suspected to be the ones. Anyway, I post a little jpeg here of the code if someone ever needs the same functionality. What it does is that it checks how many Excel workbooks are open and controls if each of them matches the searched Excel filename, if one does, it is closed.
Enjoy
/Goran
Attachments:
List open excel sheets and close open ones.jpg ‏104 KB

How to use ActiveX Microsoft Office Excel Chart?

Does anyone know how to use "ActiveX Microsoft Office Excel Chart" from CVI 7.0? I tried with following code but it did not draw anything.
HRESULT MakeChartInExcelActivexCtrl(void)
HRESULT error = 0;
char szErrMsg[256];
// Create a new chart with its own worksheet
// ExcelRpt_ChartNew(workbookHandle,-1,&chartsheetHandle);
SetWaitCursor (1);
// Open new Range for Worksheet
error = CA_VariantSetCString (&MyCellRangeV, EXCEL_ARRAY_OF_CELLS);
error = Excel_WorksheetRange (ExcelWorksheetHandle, NULL, MyCellRangeV, CA_DEFAULT_VAL, &ExcelRangeHandle);
CA_VariantClear(&MyCellRangeV);
if (error<0)
CA_GetAutomationErrorString(error, szErrMsg, sizeof(szErrMsg) );
goto Error;
error = Excel_GetProperty (excelChart, NULL, Excel_WindowActiveChart, CAVT_OBJHANDLE, &ExcelChartHandle);
if (error<0)
CA_GetAutomationErrorString(error, szErrMsg, sizeof(szErrMsg) );
goto Error;
// Create a XY scatter chart using the data we wrote to the worksheet as its data source.
error = ExcelRpt_ChartWizard(ExcelChartHandle, ExcelWorksheetHandle, EXCEL_ARRAY_OF_CELLS,
ExRConst_GalleryXYScatter, ExRConst_Columns, 0, 0, 0, 0, "Filtered Data Chart", "",
"Weather Data", NULL);
if (error<0)
CA_GetAutomationErrorString(error, szErrMsg, sizeof(szErrMsg) );
goto Error;
// Change the plot lines to not display markers and smooth out
// the plot lines. This is one of the plot styles available in Excel.
error = ExcelRpt_SetChartAttribute (ExcelChartHandle, ER_CH_ATTR_CHART_TYPE, ExRConst_XYScatterSmoothNoMarkers);
if (error<0)
CA_GetAutomationErrorString(status, szErrMsg, sizeof(szErrMsg) );
goto Error;
Error:
SetWaitCursor (0);
CA_VariantClear(&MyCellRangeV);
CA_VariantClear(&MyVariant);
ClearObjHandle (&ExcelRangeHandle);
ClearObjHandle (&ExcelChartHandle);
ClearObjHandle (&ExcelChartObjHandle);
ClearObjHandle (&ExcelChartsHandle);
if (error < 0)
ReportAppAutomationError (error);
return 0;
Attachments:
excelActivexCtrl.zip ‏4692 KB

I use C:\Program Files\National Instruments\CVI90\toolslib\activex\excel\excelreport.fp to build/modify excel report.there is very detail configuration in this function moudule , hope it can help you
Sonic
Diffrent Strokes for Different Folks

Bug Appeal: LV6 activeX with Excel; Error -2147319784

At Thu, 16 Nov 2000 14:55:00
"Dominic Lavoie" wrote:
<-2147319784 Old format or invalid type library.
Dominic and others
This is an old bug in LabVIEW that I have been fighting
with for several years. The problem (as I have seen it) is that
LabVIEW for some reason on some PC's suddenly becomes unable to read
from the (NT-) registry that Excel is installed as an
available ActiveX component on the machine. In my case the
Excel8.olb file.
Under earlier verion of LabVIEW no error messages
was generated, but you could see the problem when entering
the list over ActiveX classes, Type library. Suddenly the Excel
would be gone from this list, and it will not come back no matter
how you try to install, reinstall or reconfigure the Excel (or Office)
system. (And the Regsvr32 program does not handle OLB files.)
The only way I have heard to fix it, is to reformat the
harddisk and install the OS and everything fresh. But you might
see the problem coming back again.
There might be a possibility that this bug is not NI's, but one
in the OS. When I use other programs to View/Edit the registry,
these programs have no problems of detecting the Excel library.
So I believe it is a LabVIEW bug !
When working with Excel and ActiveX with this problem
meant that you had to manually browse to the OLB file each time you
would want to work with it, or you would sometimes get messed up
the wires and VI's working against the Excel library.
Now, under LabVIEW 6i, this situation creates the error message
-2147319784, and the problem suddenly seems much bigger.
I have reported this bug two month ago to NI, together with some
other people that has seen the same problem. So far NI has not
been able to locate the problem in detail or done anything with it,
as far as I have been informed.
This has been a very frustrating experience for me, because there are
many other features under 6i that I would like to use right away.
But since I am working a lot with Excel as a data format from LabVIEW,
I cannot proceed with 6i before they have broken this bug.
So now I would like the LabVIEW community to help me push NI
a little in their effort to debug this one.
All questions of course assuming that you have installed Excel
on your PC.
Could as many as possible out there check out if,
when testing the ActiveX/Excel examples;
A) under 6i; do you get the Error -2147319784 ? (YES or NO)
B) under 5.1.1 or earlier; can you run the example Write Table to XL.vi ?
(YES or NO)
C) if B=NO, can you locate the Excel library in the ActiveX class list ?
(YES or NO)
D) Where in the world are you located (country) ?
(Some has speculated that this bug might be connected to a problem
with different OS versions in different parts of the world.)
E) What version of Excel are you using ?
F) What OS are you running ?
If you can't do both A and B/C, send me the one you can.
Please report your results directly to me.
DO NOT REPLY TO THIS LIST. I will send a
summary after a couple of weeks, to let you know
the results. And also if NI seems to make any progress here.
best regards
Martin Plassen

"[email protected]" wrote in message
news:[email protected]...
> Martin, I'm not sure how to reply directly to you. (I can't find your
> email address or anything.) I may be experiencing a very similar
> problem. I am trying to generate Excel reports using LabVIEW 6.0
> under a Windows 2000 OS. Under Win95 in LabVIEW 4 I had no problem
> but I recently updated. Now I can't even open Excel using the NI
> distributed LabVIEW 6i Excel toolkits from ni.com. When I execute the
> Open Excel vi I get a Windows error message, "Labview.exe has
> generated errors and will be closed by windows. An error log is being
> created." Could this be the same problem dominic was having under WIN
> NT?
dmbillings
It seems NI has been so kind as to remove the fix on this problem
from their Knowledgebase. Well, I dug up some old e-mails on the subject,
and here's one you should look through. According to NI this problem
should have been fixed under LV 6, so I really hope this is not what you are
facing...
Martin
Good news for all of you,
we have a bug-fix that seems to do the trick.
Here's the recipe , with my words:
Do You have the bug ?
You can confirm that the bug is there, by opening a new file in LabVIEW,
in the diagram, insert an Automation Open.VI, right-click on it,
Select ActiveX class, Browse, and check the Type Library list.
You should not see the Microsoft Excel5 and 8 library in the list,
if the bug is there.
As I have suspected for a long time, the whole bug was related to
how LabVIEW read the registry at startup to locate all ActiveX
components on the machine.
Here's the fix to try out;
1. Open the RegEdit program
2. Under HKEY_CLASSES_ROOT locate the TypeLib
3. Locate the Excel-key
On my machine this is {00020813-0000-0000-C000-000000000046}
(You will find it on top part, I think, not necessary to browse long
down.)
4. There are two base keys there, named "1.0" and "1.2".
Under the "1.0"-key, right-click and create new key, name it "0"
(zero).
5. Under the new "0"-key, create a new key kalled "win32".
6. Under the "1.0"-"9"-"win32" key you will find the link to the
Excel5-library on the machine, copy this link into the key you created
under pt 5.)
On my machine this is "C:\Program Files\Microsoft
Office\Office\XL5EN32.OLB".
That's all. Exit RegEdit.
Afterwards, check again that the Microsoft Excel5 and 8 libraries
is on the LabVIEW list mentioned above. After restarting LabVIEW of
course. It is not necessary to restart the PC.
Attached you wil find two gifs showing how this should look
in RegEdit before and after the described operation.
Good luck
PS: hacking around is the registry are do be done with
caution. The wrong actions here could have large consequences.
The two attached pictures should help you out,
but if you feel uncomfortable by working with the registry,
try to hook on to some hacker around that has been there before.
As I understand it, this is the reason that NI asked me also not to
give this info directly to the List-server. So please don't do it
you either. I plan to put the word out about the fix, not with these
details, but with a reference to the NI Knowledgebase that soon will
have this info.
You are welcome to send me a conformation that you see the
fix is working, or worst case, not.
Martin

ActiveX excel aquisition

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