I'm creating a program and it is paramount to its functionality that it can open->read->close a Microsoft Excel (.xlsx) file.Now, I've searched the forums with the keyword "Excel" and found a lot of stuff in many programming languages, none of which were any use to me.
I should pinpoint that I'm not that good at programming as university takes all my times, but every summer (like this one) i really enjoy tackling my problems via programming.[code]...
I am trying to import and read data in from an Excel file that is being updated every half second by way of a DDE Link from RSLinx Gateway,which I think is a default setting, though that data only changes every few minutes. There are 5 rows and 8 columns of data that I am reading in.Each column is a different tester starting with the second row, Testers 1 through 7. The first column has titles that describe the data coming in from the DDE links.
Each column has 5 rows of data related to the tester.I know how to display the data which I will post my code for below, but as far as reading the data and determining whether or not the part was good or bad, based on a boolean value, I am stuck.I would also like to save the data into a different excel file after determining the status of the part so that we can look at past data.
Code display:
Imports System.IO
Imports System.Data.OleDb
Imports System.Drawing.Printing
[code]....
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
[code]....
I want to read data (read only) from excel files
I use this connection string
Con_BarCode = New ADODB.Connection
With Con_BarCode
.ConnectionString = "Driver={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm,
[Code].....
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
Try
Dim OledbConnectionString As String = String.Empty
[code]....
I tried to read excel file using the method i found here [URL] But i get an error on ADODB.Connection saying "Type 'ADODB.Connection' is not defined" in the following code:
Code:
Private Function GetExcelConnection(ByVal Path As String, _
Optional ByVal Headers As Boolean = True) As Connection
Dim strConn As String
[Code]....
Its was used in VB6... do i need to do something special in Visual Studio 2010?
I have some problem about read excel file in vb.net i want read data in excel. that excel file select from user local drive. so user browse to their local drive and read from that path. after that, bind data to datagrid.
View 5 RepliesI am reading in data from an excel file that is only viewed inside the program. This excel file is being populated by data from multiple PLCs (7) through DDE links via RS Linx Gateway. I would like this data to be written to two different excel files and specific sheets within those so that it can be viewed later on.
My program has a form that will allow the user to view the data live, meaning they look at the first excel file from the program so that they are not able to edit the DDE links or change the file in any way. The other excel files (there will be two, one for good parts, one for bad parts) have specific sheets for each part and each tester station. For example, if the part is a ABC part, and it is a good part, and it was tester on tester station 1 then it needs to be saved to the good parts excel file, in the ABC sheet and in the good tester station 1 sheet.
If part XYZ comes along and is a bad part (fails testing) then it needs to be saved to the bad parts file, the XYZ sheet and the bad tester station 1 sheet.I might have added more detail than is needed to solve the problem but I thought I would add it anyways to help you all understand my problem a little better.
I am trying to write a windows application in vb.net to import data from excel to sql server. I got "object not set to an instance of an object" error. The data actually have been inserted into the sql. The following is my code. I have a button when the button is clicked, it does frmProcess(). The first row is header in excel. I start to read data from 2nd row.
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Private Sub frmProcess()
Dim app As New Application()
Dim book As Workbook
[code]....
how can I create a connection to excel file and view the result in vb. I am using visual studio 2008?
View 7 RepliesI have created I hope a sequence of steps that reads data from an excel spreadsheet into my VB app..specifically into a checkedlistbox. I would also like to do this in reverse IE Copy values from a checkedbox list back into a new worksheet?
View 1 RepliesI have an excel sheet that contains 25000 phone numbers listed in one cell with no sorting order. I want to create a small windows application that can read the sheet and return the total number of the phone numbers and how many duplicate numbers as well as the number of times of repetitions. How I can resolve this issue? What is the best way to approach it? I'm using VS 2008 and VB.Net.
View 14 RepliesIm new to this .NET programmin...i just need to know some basic stuff abt readin data from excel..I just use ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + p_fileUrl + ";Extended Properties='Excel 8.0;Mode=Read;IMEX=1;'") to read data.in a particular column,first ten or below cells hav no values and the rest has values.
View 4 RepliesI been google search for a while (a month at least). My problem before is how to read raw data from access. however, i find out that access not suitable for my project. I more interested in using Excel, because for later analysis i would came out with graph using excel rather than using access. Since, i been develop a GUI Program for Battery Cyclic Test. The part for Cyclic Test and DAQ Interfacing is done already.
My weakness is not been able to understand/know how to read raw data for particular column, and display it into textbox. In many out there forums or discussion, they explain about this kind of database by using class in VB. But, i would like to implement excel data manipulation in VB-Window Form Application.[code]...
I am trying to read excel data (Excel 2007 SP1) with visual basic .net 2008 (VB 9.0 SP1). I have tried several attempts and even when I copy and paste the code that manhit45 proposes (Thread: working with excel) I am getting the following error message: ystem.Runtime.InteropServices.COMException was unhandled ErrorCode=-2147319784 Message="Altes Format oder ung�ltige Typbibliothek. (Exception from HRESULT: 0x80028018 (TYPE_E_INVDATAREAD))"
View 14 RepliesUsing VB.Net, I am reading an Excel spreadsheet does anyone know what might cause a cell to be read as VBNull when it contains data?the cell clearly contains data. and what is extra weird is all the same cells in the rows before and after the bad one have the little green triangle in the upper left corner, indicating an error - but they all read fine the cell that reads as NULL is the cell in row 4 above
View 1 Repliesome simple program that can send simple .txt file over RS232 to another PC, read this .txt file and export to excel.
View 2 RepliesI have excel 2007 installed on my laptop. I have vb.net 2010. I have tried a dozen different pieces of same code and I cannot read from an excel file...
Imports Microsoft.Office.Interop.Excel
Public Class Form1
Private Sub Form1_Load( _
ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles MyBase.Load
[Code] .....
Warning1Namespace or type specified in the Imports 'Microsoft.Office.Interop.Excel' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases.C:UsersksimonsAppDataLocalTemporary ProjectsWindowsApplication3Form1.vb19WindowsApplication3
I am trying to read from an excel file. so far this is what i have:
Public Class testclass
Private wrkbk As Excel.Workbook
Private sht As Excel.Sheets
[code]....
The debugger gets to the "sht = wrkbk.worksheets(1)" line then says its has error: Member not found. (Exception from HRESULT: 0x80020003 (DISP_E_MEMBERNOTFOUND))
I have a program that I wrote that uses a system generated excel file from a remote system.
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The issue I'm having is when I query the system generated excel file, it is not returning the last row. If I open the file in Excel and then save it, It returns all the rows. Since Windows 2008 64bit does not allow control via Excel to the file, I have to query the file via Jet provider or Odbc provider. I have tried using the Jet provider and the odbc provider.How do I get all the return all the rows with the system generation file?
I need to write VB program to open and read text file, store each field (separated by comma) into an array. In the first array, it's an excel file and I need to execute it, and once opened in excel, there is a macro program inside and i need also to exceute using VB.
sample content of textfile:
C:principalsinventory.xls, MacroInventoryReport, 1, 3:00AM
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C:principalsinventory.xls, MacroNearExpiringReport, 1, 4:00AM
I want read data from excel file and it's done.but I've problem about excel that open from program. I cant edit or open that file from ms Office.sample:I have masterCode.xls in my local drive. with vb i open that file, read data and bind into gridview.it's work. after close program, i open masterCode.xls with ms Office, that file opened but it automatically closed.when i open vb and run program again, select the same file, read data but now its error ("File is used").
Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnUpload.Click
Dim objExcel As Excel.Application
Dim objWorkBook As Excel.Workbook
[code]....
I have to do an application using VB.Net .The application must be able to capture values from ms word data table and map them to ms excel sheet. For your information, i have over 6000 files ms word document, each of them contains 4 data tables using the same format .Then i have this code for read from data table 1 in document 1:
Dim
wb As
Excel.Workbook<br/>
[Code].....
I have an excel file which is auto generated by third party software..and its readonly file and its data constantly keep changing online. Now I want to use or read that data in my vb.net application whenever its changes take place in excel file automatically.
View 1 RepliesThe first thing to do is to browse the excel file in my vb.net program then read the content of excel file and display the value of excel content in listview.
View 2 RepliesI have always used Excel.interop before but I thought oledb would be simpler because, for this application, I only have to read the data which it can't seem to do. It accesses the file alright because I can't open the file while I am at a breakpoint. It attempts to read the file because oExcelReader.fieldcount = 14 which is correct. oExcelReader.hasrows = true which is not correct. The line where I use getstring(1) errors out and says there is no data for this row/column.
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I need to read a .txt file and then put that into fields in an excel spreadsheet. for example i get print spool files that have invoices on them i need to put the customer names into a column of customer names and their addresses into a column of addresses. here is what i wrote to read with:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim reader As New System.IO.StreamReader(TextBox1.Text)
[Code]....
I want to read an excel file using VB.NET program. I know the logic below can do this. But I have a question. What if I don't know the name of the worksheet OR if the name of the worksheet is not SHEET1?
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I want to rewad values from an Excel file that is always open and updating. I was using standard code to open up Excel and read from it, which worked fine, but that opens a new instance of the sheet. I need to read from a sheet that's already open.
I'm using xlWorkBook = xlApp.Workbooks.Open("c:\example.xls") which opens a new instanc of example.xls.
If example.xls is already open, is there a way of reading from it?
Working in VB in VS 2008 I'm trying to read from an Excel file using Oledb. I have no problem with it when the file is not encrypted, but the client has set a password on the working copy.
I read elsewhere that it's not possible to read an encrypted Excel file this way, but I find that hard to believe.