VS 2008 C# To VB Conversion Errors-Generate Excel Files Not Using Ms Excel?

Feb 12, 2012

[URL]..a good way to create Excel files without using Ms Excel,but this is C# source code,I used [URL]..to convert from C# to VB.NET,but after conversion There are some strange errors :

Error21Too many characters in character literalc:BBBXLSExportDemoXLSExportDemoExcelDocument.vb1625XLSExportDemo
Error22Empty character literalc:BBBXLSExportDemoXLSExportDemoExcelDocument.vb1633XLSExportDemo


[2008] Excel Access Excel Conversion

Jan 24, 2009

I'm coming to the conclusion that the things I want to do in a database are better done if I run a conversion code from Excel to Access, do mighty things in Access, then have the option of converting back to Excel to distribute elsewhere. I'm already familiar with using Access and the code I keep finding in threads almost always refers to .mdb files. Below is a conversion that does not seem to work (button2). I'm trying to do this through ADO with OleDb connections. If I can convert to Access much will make sense.

Public Class Form1
Private Adapter As New OleDb.OleDbDataAdapter

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click


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Using Same Code To Generate Excel Files In XP And Vista

Jun 25, 2009

We have an application written with VB .Net (framework 2) that needs to run both XP and Vista machines. The XP machines have office 2003 while the Vista machines have office 2007.The application needs to generate reports as excel files. But when the files are created with xls extension the office 2007 in vista doesn't like the extnesion and gives a message before opening file about the file format.Is there a way to ensure through code that the correct file extension supported by the office version on the machine is used.v

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Merge Multiple Excel Files Into One Excel File And It Works For 3 Source Files But Its Not Working If Workbook With Worksheet Count Is > 3?

Aug 18, 2011

I'm trying to copy multiple excel source files into one excel file. My current code is working only for 3 source files..If more than 3 files are there, it doesn't copy the data but creates blank work sheet in the output excel file. Lets say I have a source folder with 5 excel files. Each workbook contains one worksheet with data. It copies upto 3 worksheets along with data into output excel file.

Lets say excel1 contains A as work sheet, excel2 contains B as work sheet ,excel3 contains C as work sheet ,excel4 contains D as work sheet ,excel5 contains E as work sheet .Now my output excel file should look like..OutputExcel with A, B, C, D, E along with respective data.But my current code is giving output as A,B,C worksheets along with respective data but its creating blank sheet1,sheet2 in place of D & E.

SSIS Script Task Vb.Net Code:

Sub Main()
Dim filePath
String =


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Generate Excel Sheet From A Excel Template In Asp.net ?

Oct 28, 2009

i need to generate an excel sheet from an excel template which contains drop down lists. I need to use the template and populate the with data from datbase and select the appropriate value from the drop down lists and generate the new excel sheet.

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VS 2008 Errors Changing Type Excel?

Mar 29, 2010

Error14Option Strict On disallows implicit conversions from 'System.Windows.Forms.TextBox'to 'Microsoft.Office.Interop.Excel.TextBox'

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VS 2008 Inserting Data Into Excel Keep Getting Errors

Oct 11, 2009

I am testing out this code which creates a excel file, and then call a sub to insert data into the file. The excel is created, but the function is not inserting the data. I am getting a error "External table is not in the expected format". I do not know what could be the problem.

This is the code below:

Imports Microsoft.Office.Interop
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As


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Generate A Pivot Table In Excel Using .NET 2008?

Oct 28, 2009

I'm trying to generate a pivot table in Excel using VB.NET 2008. I need to bring the data into one tab, and then generate a Pivot on another (i can't do this externally because the data is pulled from a bunch of different places). Currently I'm doing this pivot in the actual code, and then writing to Excel, but it takes up a lot of resource and time and this will make things much easier! I created a sample list below, and I am trying to generate a sample pivot table based on it, but I'm getting errors:

Dim wb As Excel.Workbook
Public Sub ExcelGen()
Dim ex As New Excel.Application


The error I'm getting right now is the no object reference set error on the "pCat =" line...

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SQL Server 2008 FileStream And Excel 2007 - Errors In Opening The Spreadsheet?

Feb 12, 2010

I am having a problem with using the SQL Server 2008 FileStream function with an Excel 2007 spreadsheet. I can store an Excel 2003 format spreadsheet and bring it back with no problem. When I bring the Excel 2007 format spreadsheet back from the DB I get a message that there are errors in opening the Spreadsheet and the Excel App asks if I want them repaired before it is displayed. I answer yes and the Spreadsheet is renedered perfectly. Could this be a FileStream problem or an Excel 2007 problem?

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VS 2008 - Handle Errors - DataGridView Was Filled From An Excel Sheet With A Column Of Currency

Dec 6, 2010

I'm trying to read rows in a DataGridView and the following error is thrown up. The DataGridView was filled from an Excel Sheet with a column of currency. Ideally when the For Next loop finds a cell it doesn't like, I want to to ignore and resume the loop. The error message is: Object reference not set to an instance of an object


For Each row As DataGridViewRow In Me.DataGridView2.Rows
FirstString = row.Cells(0).Value.ToString


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Reading Excel Files In Vb.net Leaves Excel Process Hanging?

Oct 23, 2009

The following code works fine but seems to leave instances of excel.exe running in the background. How do I go about closing out this sub properly?

Private Sub ReadExcel(ByVal childform As Fone_Builder_Delux.frmData, ByVal FileName As String)
' In progress
childform.sampleloaded = False


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May 11, 2012

I'm creating a program in VB.net that does the following:At a high level I receive a file in email, put the attachment in a monitored folder, import the text file to excel, format the excel, and then email the excel file to a list of recipients.

Here is my plan:

Completed: Outlook VBA to monitor all incoming email for specific message. Once message is received drop attached .txt file in a specific network folder.

Completed: (VB.net) Monitor folder, when text file is added begin processing

Not Complete: (VB.net) Import text file to Excel

Not Complete: (VB.net) Format Excel Text file.(add in a row of data,format column headers with color/size, add some blank columns, add data validation to some of the blank columns that allow drop down selections)

Completed: (VB.net) Save file.

Completed: (VB.net) Send file to list of recipients.

Obviously the items above that are not complete are the bulk of the work, but I wanted to get some advice on what some of you think would be the best way to approach something like this. The import and formatting of the file are causing me some problems because I just can't decide what would be the most efficient way to do this.

The way stated above. Import to excel -> format Having a template excel that contains all of the formatting already done for me and attempting to transition the data to this document (no clue if/how I can do this). Is it even feasible? Have the template already created and then import the text file to a new excel file, then transition that data to the excel template?

Something I thought about, in terms of formatting the document, was to record a macro of me doing all of the formatting that I'm going to need and then attempt to convert that macro into my vb.net code, but I'm not sure if that will work. I will need to verify that the text file comes in the EXACT format every time correct?

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Aug 26, 2009

I have a .Net program that responds to worksheet updates of an Excel 2003 workbook.  Sometimes when the worksheet is updated and I try to write related data to my forms, I'm getting "Cross-thread operation not valid...." errors.  This confuses me, as I have never done any multi-threading in my program.  Does the mere act of me responding to events of an external excel worksheet mean I am now multithreading?  Is there a way to handle the events without multithreading?

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Jul 20, 2010

I need to access the current instance of MS Excel. To do that, I wrote the following code:

Imports Excel = Microsoft.Office.Interop.Excel
Imports System.Diagnostics
Private _ExcelApp As Excel.Application


The code runs nice, but it has a problem: After the user close the Excel application (click button X - note: no other instance of Excel exists), if you open the Windows's task manager, its possible to see the process Excel.exe.

If I open and close the Excel application, there is no process Excel.exe, but if I run my code with the Excel application openned, after the user close the Excel application, the process Excel.exe isn't finished.

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Jan 22, 2011

I am trying to retrieve the data from EXCEL 2003 spreadsheet from row 8 onwards because from Row 1 to Row 7 the row is merged columns from A1 to K1, A2 to K2, A3 to K3, A4 to K4, A5 to K5, A6 to K6, A7 to K7.

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[2008] Automatically Overwriting Excel Files?

Feb 10, 2009

I'm trying to edit an existing xls and just overwrite it without a prompt to overwrite. I thought it was something like Excel.DisplayAlerts = False but that's erroring with 'DisplayAlerts' is not a member of excel.

So this is my current closing code that doesn't work.

Excel.DisplayAlerts = False

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VS 2008 Coloring Excel Sheet - Efficient Way In Order To Provide The Colored Excel Output?

Dec 19, 2011

I have to provide an Excel file as an output. I have to color some of lines and make them bold.The input is based on a dynamic list (in memory) and it also could be based on CSV file that I'm already provide today (based on the same dynamic list).I'm wondering what would be the most efficient way (in terms of performance) in order to provide the colored Excel output?Should I export directly from dynamic list into Excel - or - Should I export from CSV into Excel ?

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Oct 7, 2009

I am trying to read excel data (Excel 2007 SP1, on Windows XP SP3) with visual basic .net 2008 (VB 9.0 SP1). I have tried several attempts and whatever I do I am getting the following error message: System.Runtime.InteropServices.COMException was unhandled ErrorCode=-2147319784 Message="Altes Format oder ungültige Typbibliothek. (Exception from HRESULT: 0x80028018 (TYPE_E_INVDATAREAD))" Source="Microsoft.Office.Interop.Excel" Message="Altes Format oder ungültige Typbibliothek." Translated: Old format or unknown type libraryI have added the reference "Microsoft Excel 12.0 Object Library" to my project. I am assuming that I might have to add a different or an additional reference, but I do not have any clue which one to use. List of things I have already done:- Searched other forums- Altered the language settings- Tried it on an other Computer (Win XP SP3, Excel 2007, Visual Basic 2008 Express)- Ran the diagnostics tool in Excel - Updated all updates etc...- Reinstalled Visual BasicI really do not have any clue why it should not work?

Imports excel = Microsoft.Office.Interop.Excel
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim xlsApp As excel.Application


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VS 2008 : Use Code To Read Excel File With Excel Installed?

Feb 7, 2012

I am uploading an excel file to my app and want to read it. Do I need to have excel loaded to read this?I am getting an error of Object reference not set to an instance of an object.

Public Function GetExcelData(ByVal ExcelFilePath As String) As DataTable
Dim OledbConnectionString As String = String.Empty


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Using Interop For Excel Not Working And Causing Errors?

Jun 28, 2012

This is quite a pickle... I am using interop to read and write in excel but the project is not reading the excel correctly,!

This is in a public Module
Public name, accessories, comments as string
Public edit As Object


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Jun 12, 2011

Originally I was using Office Interop to import data, but that was a headache and a half for both me and my computer. Right now I'm attempting to load it with ACE, but my data grid isn't being populated. Once that's up and running I need to know how to use that data in other ways, and how to grab specific cells of data from that dataset. I'm using Visual Studio 2008, by the way.

Public Function funcUpdate(ByVal sFileLoc As String) As Boolean
'Determine connection string properties
Dim dbProperty As String


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Conversion Of Excel VB To .net 2010?

Apr 24, 2012

I'm trying to convert some of my code from EXCEL VBA code to VB.net. However I've been encountering some errors and can't seem to get to display the output correctly.Below is my sample text data:

---------- -------- ----- ------- ------ ------- -------- --------- ---------
03/18/2012 09.00.00 CP1A 11.97 12.03 3 1.1 99.0 2.0
03/18/2012 09.00.00 CP1B 8.86 9.12 3 1.1 99.3 2.0


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May 6, 2009

How can the openoffice.org can be used for converting excel to pdf in vb.net.

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Aug 10, 2010

There are 50000 thousand records in the data table which is binding to the crystal report. but while generate a PDF or excel report from ASP.net it is giving as time out exception.

how can we resolve this problem and any one can tell me what is the max records limit in the crystal report.

I have increased Session Time and application time by using maxrequestlength and executiontimeout attributes of in the HttpRunTime elemnt tag in web.config then also no we are gettting page cannot be displayed

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Aug 31, 2009

I am trying to generate an excel report where the data is coming from access database using VB.

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Jul 15, 2010

I have written a program that will export data from access data to Excel by using XML programmatically, But I seem to be having problem when I tried to open in excel.

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Select Excel Files And Import To SQL Server 2008 Express Table?

Jan 14, 2009

Does anyone has a sample code that do like,Open and select excel file and select the exact excel sheet to import then connect to SQL server 2008 and append all the data from the certain sheet to the SQL table?

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Nov 29, 2010

I have the following macro that copies a set of rows and using the "Insert Copied Cell", replicates those rows.


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May 2, 2011

How to convert an excel serial date as 39051,4387847222 in a datetime as 30/11/06 10:31:51 2549

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Jun 11, 2009

I want Excel data in a text file.

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Aug 18, 2010

I have the following lines showing up in files that have been converted to XML from an Excel worksheet:

<Worksheet ss:Name="Sheet1">
<NamedRange ss:Name="Print_Area" ss:RefersTo="=Sheet1!R30C1:R8642C15"/>


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Aug 8, 2011

After exporting data using a third party component the data in the excel sheet isn't type correctly. Excel thinks that some values are string while they are numbers and a little green triangle shows up.

We've coded the following to fix this:

For Each objCell As Microsoft.Office.Interop.Excel.Range In objWorkSheetReport.Range(objWorkSheetReport.Cells(1, 1), objWorkSheetReport.Cells(Me.RowCount + 10, Columns.Count + 10)).Cells


This removes all those little green triangles but is really slow.

Is there a faster way to convert a Range of data quickly so the green triangles don't show up?

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Disable Excel Export Option When Generate A Report Via TReportViewer

Apr 19, 2010

How can I disable the Excel export option when I generate a report, via the ReportViewer, in my winforms application? In particular, I want to hide the toolbar button that refers to Excel output/export task, and not .the one that handles to the pdf export option.

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Takes Long Time To Generate Excel File Using OPEN XML SDK Tool?

Aug 1, 2011

i have developed an application using OPEN XML SDK Tool 2.0 which generates Excel file. I have Data table of 100000 row and 30 columns and i want to generate excel file with these 100000 rows and 30 columns but it takes about 2 minutes of time to generate excel file. What can i do to reduce this time.

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Jun 20, 2010

which are the control used to display word files and excel sheets inside vb.net forms ? (i have already added reference lib.)

Platform: Vb.net (framework : 3.5)
language : visual basic

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Aug 23, 2011

I am trying to import a bunch of excel 2003 files all with A:H columns and they are under the same headings etc. into a table in access 2003 database. This is a module in access im making. Im using a file search to look for every file that begins with Format (which they all do ) to get at all the files in the folder path. is there a more efficient way to do this? somehow select all files in a folder? and import each to the same table in access? The DoCmd.TransferSpreadsheet seeems to take each file path individually so I'm not sure how to get each file name in the folder to import it.

I have this at the moment:

Sub Import()
Dim db As Database
Set db = CurrentDb


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Jun 24, 2009

can I use Excel APi (Interop.Excel) without installing MS Excel.

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Aug 31, 2009

Here's 2 questions that I hope someone can help me on.  This is in VB.net.  I keep on getting this error 'java.io.bufferedInputstream.count is not accessible in this context because it is 'Protected Friend'.  Does anyone know how to fix this error?

The other errors i get are "Overload resolution failed because no accessible 'Val' accepts this number of arguments".  I have listed below the code that I have coverted from Java.  Where is my mistake?'the underlined areas are where it is giving me errors.


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Load A Excel Files And Use It?

Aug 6, 2011

I'm starting with VB 2010. I have an Excel file with a lot of info (dates, kilometers, price, name, etc.). I have been reading about that but I don't do it right. I want to now If someone of you have some code to study or any other resource.

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