Office Automation :: Read Excel Using ADO In .NET 2005?
Apr 27, 2009
I am trying to read data off an excel file, using ADO and everything works fine ....EXCEPT:I get an error opening some files, if they are not open otherwise. The error is - "External table is not in the expected format". But if the same file is already open, then I do not get any error, and everything works fine.
If I copy paste the contents of the same file into a new file, and save it under a new name, I still get the error.Something strange I have noticed with this file is that if I open this file and try to close it, without making any changes, it still asks me if I want to save the changes.This is a file I get from an external source, so I have no control over the contents/format etc.The following code gives a part where I try to read all the sheet names in the file.
[Code]...
View 19 Replies
ADVERTISEMENT
Apr 20, 2010
Ok basically what I need to do is the following:Read FirstExcelDoc (attached)For every row in that: Retrieve data from sql server db based on info in the Orange columns of FirstExcelDoc Let's say I retrieved data elements A, B, C, D, and E from sql server. Then I need to enter those same data elements A, B, and C in another excel spreadsheet (which has formulas etc) After inputing A, B, and C in that spreadsheet, read a couple of calculated fields and compare those results to data elements D and E retrieved originally from SQL Server DB. Finally, output the results in the Blue columns of the FirstExcelDoc spreadsheet for that row.Loop through and do the same thing for row 2 of the FirstExcelDoc and keep on until you see "END TEST" in the FirstExcelDoc.
I'm looking for a method of doing this efficiently. I have read several articles over the past few days as well as those from Mike R. but just need some direction to get started on this.To start of I'm looking for whether to read the entire FirstExcelDoc spreadsheet or just read the info for first policy number(2nd row) and process it and write out the blue column info for that row and then loop through and come back and read the second policy number (3rd row) etc... Please attach a code snippet for either way of reading the data.
View 19 Replies
Aug 17, 2009
[URL]
I am not sure I should be asking a question like this. But while going thru the thread I could understand assigning values from Excel cell when you know cells address. I am trying to find out syntax for activecell, activecell. row, activecell. offset etc.
View 1 Replies
Apr 21, 2011
I have an app that uses ADO to read through an Excel document. The program ran great on XP-64, but now I'm on Windows 7-64.I've been reading all kinds of stuff on this, turning on IIS, and other things. All my settings seem to confirm a correct setup.
[Code]...
View 1 Replies
Jun 17, 2009
I am trying to create a program which loads a Excel file (03) with various worksheets, and the user can update them.I think it should use the Tab system on vb (08 express) and have each worksheet on each tab.On the tab, it should list the first 8 cells.
View 1 Replies
Mar 26, 2011
I am trying to read two text files and write in differents tabs.
Code:
Dim xl As Object
xl = CreateObject("Excel.Application")
xl.Visible = False
Dim i As Integer
[CODE]...
View 1 Replies
Feb 14, 2009
It appears that when one creates an instance of Excel, using CreateObject, (Late binding), the suggested Excel closing function (with GC.collect etc) does not work. I have tried several suggestions, and the only one that works is process.kill method. Do you see any problem in using this? BTW: the reason we are using late binding is that we cannot use Office PIAs....not sure which version of Office would be installed on the client site. We work with O2003, but the client might still be at 2000 or 2002.
View 7 Replies
Jan 25, 2011
I have written an automation addin in Excel with C# (addin.dll). To use the addin, I need to 1. register it using "regasm /codebase c:...addin.dll"2. select in ExcelOptionsAddInsExcel AddinsAutomation the respective addin from the list
I would like to automatize 1) and 2), so that the user just needs to run an exe-file in order to use the addin. 1) should be no problem, but how can one automatize 2)?
View 12 Replies
Jun 17, 2009
I'm using excel via interop in application.Sometimes users kill application that created excel instance and that results in excel instance sitting in memory without any chance of disposing it.First I tried to tackle this using ROT(running object table) looks like not all instances of excel are registered there.Than I tried to somehow mark excel process after it is started via interop.[code]This works as long as excel is visible but in my case excel window is invisible.All I need is to somehow mark process that started via automation with the parent PID, so that later I can kill it if parent does not exist.
View 19 Replies
Dec 17, 2010
I have been pulling my hair out trying to fix this.
[Code]....
View 1 Replies
Jun 1, 2010
We have a vb program which is run on our server by scheduled task every day. The program opens about 30 excel files, refreshes the data connections, pivot tables and then saves the document in another location.
This may run fine for a couple days but sooner or later the process starts crashing, usually with this error: RPC_E_SERVERFAULT.
My question is, Is it expected that continually opening/closing/refreshing workbooks will inevitably cause the Excel object to crash at some point.
View 3 Replies
Mar 28, 2011
i was wondering if someone could give me the final explanation on what i might be doing wrong here.I spent a lot of time reading around the net and the forum about how to add Threading capabilities to a VB project.
Nos, i've got .NET 4 installed, and i've added the system.tsr and mscorlib.dll files as reference in, say, Excel 2007 (see screenshot).However, when i try to make a thread with anything as basic as "Dim Thread1 As System.Threading.Thread", i get a user-defined type not found error.Indeed, when i use the object browser to see what's in the System file, theres nothing remotely linked to any Threading, and in the mscorlib file, nothing under "Threading" either, just a few Thread related functions, but nothing defining a data type
View 2 Replies
Sep 25, 2009
I'm having an issue where my excel.exe process doesn't close until I close my .net application. I'd like to avoid using Process.Kill() if at all possible.
Code:
Private Sub WriteRowsToXls(ByVal rows As DataRowCollection, ByVal xlsPath As String, ByVal showStatus As Boolean, Optional ByVal AddTotals As Boolean = True)
Dim xlsApp As New Microsoft.Office.Interop.Excel.Application
[CODE]............
This method references a couple of other methods I use for repeated formatting tasks, I'll include those methods below. (I added the FinalReleaseComObject into the other methods after reading Mike's thread but the issue persists)
Code:
Private Sub SetRangeValidation(ByVal rng As Range)
With rng.Validation
.Delete()
[CODE]..............
Method SetRangeAllBorders does about the same as these other methods but my post is too long to add it. The only other things not shown in these code snippets are a few string variable that are defined in the class, studentWS, studentsWSPW, paymentsWS and paymentsWSPW My App creates an instance of the class, loads some data, runs the method above, and then sets the class to nothing. I'm using .NET 3.5 automating Excel 10
View 2 Replies
May 28, 2009
I am developing an application using excel automation.The worst thing is the client's side doesn't have excel installed.What is the solution for this case?
View 17 Replies
Oct 6, 2009
I'm trying to upgrade a VB6 app to VB 2008. I have read the article in the tutors corner about automating Excel from VB but I cannot get it to work. Heres what I have done:
1) set a reference to the Microsoft Excel 12.0 Object Library
2) Added "Imports Excel = Microsoft.Office.Interop.Excel" to the top of the module
3) in a routine I have added: Dim X As New Excel.Application Here's where I get an error: Error 75 'Application' is ambiguous in the namespace 'Microsoft.Office.Interop.Excel'.
View 6 Replies
Feb 24, 2012
I am writing a program that loops through all of the sheets in an Excel workbook and saves each sheet as its own workbook. It turned out to be a bit trickier than I expected, since the Sheet.Copy method creates a strange object (see here for the MSDN discussion that I believe is relevant: [URL]. Anyway, I found a Stack Overflow post [URL] that got me to where I am, which is essentially complete, outside of one hanging EXCEL.EXE process that is left after the program completes, which I believe is a result of the sheet.copy method creating a new workbook (potentially a new application as well?). The other thing I run into, which I believe is related to this, is that even though I have my application set to visibility off, when I run the program, excel still opens up and is visible going through the steps.
Here is my code:
Code:
Imports System.Data
Imports System.IO
Imports Microsoft.Office.Interop
[CODE]...
Now I think the problem comes from the end of the loop, where I try to close the export file and the new worksheet it creates:
Code:
'close excel and release com objects
System.Runtime.InteropServices.Marshal.ReleaseComObject(exportsheet)
exportsheet = Nothing
xlApp1.Workbooks(fileNames(counter - 1)).Close(False)
I can't figure out what to do to release the `ComObject` for the new worksheet that is created. I have been trying all sorts of things, but it always throws a COM error when I do it and if I try to define it as nothing (like I do with exportsheet) is says that it is read only by default, so I can't do it. It seems like it should be something as simple as: System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp1.Workboo ks(fileNames(counter - 1))) But that is not the case. I have tried a few variants of this and I am thinking it has to do with the MSDN link above, but I can't quite sort out what to do. So the code works for my purposes, outside of leaving one EXCEL.EXE after it is done. As far as a test file, I am just using an Excel file with 3 sheets and I put some information on each and change the sheet name, so it is easy to see if it is working or not.
View 1 Replies
Aug 3, 2009
I use the following code snippet
Dim exlapp As New Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook_new As Microsoft.Office.Interop.Excel.Workbook
Dim strOriginal As String
strOriginal = Server.MapPath(Request.ApplicationPath & "/Attachments/") & "abc.xls"
xlWorkBook_new = exlapp.Workbooks.Open(strOriginal)
The code hangs in the last line. It works fine in the development environment. i deployed in windows server 2000 ,where I get this issue. the browser goes half way and throws the below exception after some time
[Code]...
I have set the identity impersonate to true in web config. This should be mostly an access rights issue.I have even provided access rights for the "everyone " user in the excel file and as well for the interop component. Please post ur valuable comments.
View 3 Replies
Jun 15, 2011
We have a VB 2005 program that reads data from a database and builds an Excel output file to be emailed. This works fine from my computer but when we put it on the server it fails on the Excel functionality.
The error is: Unhandled Exception: System.Runtim.InteropServices.COMException
Although Excel is not installed on the server we did also build a Setup program to install our program. It copies the Microsoft.Office.Interop.Excell.dll to the server folder with the exe.I thought the setup program should register the Excel DLL and the program should work even if the server does not have Office or Excel installed.
View 3 Replies
Aug 7, 2009
when the worksheet is built i get the error message "Object reference not set to an instance of an object.".Here is my code:
Code:
Dim myXLApp As Excel.Application
Dim myXLWbs As Excel.Workbook
Dim myXLSht As Excel.Worksheet
[code]....
View 1 Replies
Jun 19, 2012
I am creating a new software with visual studio 2010 using the program language visual basic .NET, well in that software I create a new file in excel 2007, my question is because I do not know how I can create a combobox with data of my database inside, [code]
View 2 Replies
Jun 9, 2010
I work for a financial firm doing vb.net work.I open an excel doc and populate it using calls to range...i however dont dim the range...I call xlsSheet.Range.ValueI have about 30 ranges i update in this method before printingdo i need to set the .Range.Value to Nothing in order to close the excel.exe
View 9 Replies
Dec 1, 2009
When connecting, I am getting the error 'Provider is not specified and there is no designated default provider.'[code]
View 4 Replies
Dec 7, 2010
I would like to keep part of an Excel workbook open to the user (including some VBA code) while protecting other code. What I hope to accomplish is to rewrite some of my code from Excel VBA in VB.Net and compile it into a DLL which I can then call from Excel VBA. I want end users to be able to modify most of the code in the module, but some of the process should never be touched. Say I have an array in VBA
ArrONE(1 to n, 1 to n)
I would like to pass this through into a DLL and return a new array back to VBA:
ArrTWO(1 to n, 1 to n)
1) What are the best resources for VB.Net?
2) What are some main differences between VBA and VB.Net code
3) I have read that VB.Net doesn�t handle Variant data types, which (as far as I know) is a requirement to perform matrix multiplication in Excel VBA. Any detail on this issue would be of use.
4) VB.Net test environment? I often use msgboxes or simple subs printing to a spreadsheet to test my code in Excel VBA as I go to make sure everything I code is working properly before advancing. What would be .NET equivalents.
5) How to compile VB.Net into a DLL
6) How to call a DLL from Excel VBA
7) What effect will this have on the speed of my procedure?
View 2 Replies
Sep 10, 2009
I am trying to write data to an excel spreadsheet. Simply just todays date and the value of textbox1. I can successfully write it to excel, but how do I get it so each time the application runs it writes the data to the next available row?? I know there must be some loop involved but am having trouble with the coding..
this is what I have so far.
Code:
Imports Microsoft.Office.Interop
Imports System.IO
Imports Excel
[Code].....
View 2 Replies
Mar 10, 2010
The following code is working with two exceptions: The ** are lines were a message box will appear saying that "book2.xls is already present. Do you want to save as? " I am not sure how to fix this. I would be interested to know if I am missing something or if there is a better way.[code]
View 7 Replies
Sep 6, 2011
I want to look up a value in column B and if the value of the cell in column b matches my searched value i want to look up a value in another column. If both values match the values i am searching for, i want to exit the while loop.
If there is no row that contains both my values in the range of cells, that contain any value in column b i want to exit my while loop.I am literally crying, because i just can't get this done.As you can see i am trying to do this via a for each loop.
there are so many things that didn't work so far...the rows 3 to 6 are filled, but rows 7 to 10 are empty. row 11 is filled.the counter returns the value for counter, that shows, that only not empty cells or rows were counted. I just don't get it. A already wrote, that if the cell.value is nothing, counter shoul be incremented, but this didn't seem to work.I also tried the findmethod in vba, but couldn't get it to work.
my code:
Code:
Sub GetSumme()
'====================================================================================================
' Dieses Sub summiert die zu kaufenden und verkaufenden Mengen. Wichtig f�r den korrekten Start
' im aktuellen K�stchen ist der Wert, der in "bearbeitet" steht. Das ist ein fortlaufender Wert, der
[code]....
View 4 Replies
Apr 22, 2010
I want to define a range in Excel, but I do NOT want to use "A" or "D" references for columns. I am making a table, and to set it's range I use:
Code:
.Range("A1:D4")
However, at the time i write the code I do not know how many columns will be involved, so I don't know if "D" is the end column. For rows this is fine, as i could write this:
Code:
.Range("A" & i & ":D" & j)
But how do I do this for columns? I really would rather not have to convert my integer number for the end column to text. If I know that the table should go from row 1 to 5 and column 1 to 10, how to I select this range?
View 3 Replies
Jan 22, 2009
I have created a C# .Net DLL add-in for Excel.When I try it on my home machine with WinXP and OfficeXP 2003 it works as expected. When I try it on a couple of machines at work with WinXP and OfficeXP2002 it does not work.I have spent 2 days solid reading up on this subject in general and I still cannot get to the bottom of the problem. As far as I can work out what I am trying to do should work with Excel 2002.
Some details:
- I am using Visual Studio EXPRESS 2008 (C#).
- The assembly is signed with a Strong Name Key File.
- I have installed the OfficeXP (2002) PIAs.
- I have created a class DLL in accordance with many MSDN and other internet posts.
- I have registered the DLL using RegAsm.exe and GACUtil.exe.
- I have added registry entries for Excel for CURRENT_USER so Excel should know about the DLL.
The DLL adds some Automation functions (Tools-Addins-Automation) which can be accessed in cells within Excel (for example you would enter =MultiplyFirstBySecond(2, 3) in a cell and get a result of 6) and also implements the IDTExtensibility2 methods so that when Excel is opened it creates a button on the toolbar which when pressed pops up a message box. It it this functionality (adding buttons with code behind them) that I want to expand on.I have attached the zips of the batch and registry files I have created to register the DLL in the GAC and in the registry. I have also attached a zip of the complete project. I would like to know if there is anything I should check with my machine's setup or my project or my registration/installation of DLLs, PIAs etc in order to make my DLL work on my Excel 2002 machine.
View 9 Replies
Aug 17, 2009
my program lets people pick their color to highlight different shifts.after data manipulation they can export the shifts to Excel.I want Excel to show up the same colors as the users picked so I know I need to add them to the workbook palette.the first color I import works fine but after that, all the colors get jumbled and messed up and put in random spots in the palette
WorkBook.Colors(paletteIndex) = RGB(dColor.R, dColor.G, dColor.B)
leads to
Excel.Cells(i, j).Interior.ColorIndex = paletteIndex
something must be wrong in these two lines. I get no errors, just the wrong set of colors.
View 7 Replies
Apr 25, 2012
We have created a dll to convert an excel spreadsheet to a csv file. At the moment we open the xls file, an eror occured (file doesn't exist / is used by an other user)
Used code:
Dim excel As New Microsoft.Office.Interop.Excel.Application
Dim wb = excel.Workbooks.Open("d:my.xls") '<<<<<<<<<<< not possible to open
wb.SaveAs("d:my.csv", Microsoft.Office.Interop.Excel.XlFileFormat.xlTextMSDOS)
wb.Close(SaveChanges:=False)
View 1 Replies
