Read Excel Fiels Using Ado.net In .net?
Feb 15, 2010i want to read an excel file using ado.net(if thre is soem other simple way,tht too)I want the code in VB.net
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Read Excel Data (Excel 2007 SP1, On Windows XP SP3) With .net 2008?
Oct 7, 2009I 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]....
VS 2008 : Use Code To Read Excel File With Excel Installed?
Feb 7, 2012I 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]....
DB/Reporting :: Read Excel File Without Excel Installed Using VB?
Feb 27, 2012I 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?
Read Data (read Only) From Excel Files?
May 27, 2011I 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].....
Cannot Read From Excel File
Mar 6, 2012I 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
How To Read From An Excel File
May 1, 2009I 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))
Last Row In Excel File Is Not Read Via .NET 2.0?
Jul 28, 2009I have a program that I wrote that uses a system generated excel file from a remote system.
[Code]...
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?
Read Data From Excel
Mar 26, 2010I 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 RepliesRead Excel 1st Sheet Into .NET?
Feb 26, 2008I post a question similar to this a few days ago, but nobody answer. Now I modify my request a little bit, I want to read an excel file using VB.NET program. I know the logic below can do this. The logic is shown below.
But I have a question. This logic needs the worksheet name, but usually my application doesn't have this information, the worksheet name cannot be hardcoding. I have 2 request:Can I always upload the first sheet from the selected excel file. (ACCESS can do this without knowing the worksheet name).
[Code]...
Cant Read All Info From Excel To Datagrid?
Dec 3, 2010this is my code for exporting datagrid to excel
Dim strFileName As String
' Create a dialog box to find the excel file
Dim dlg As New Windows.Forms.SaveFileDialog()
dlg.Filter = "Excel Files (*.xls)|*.xls"
dlg.FilterIndex = 0
[Code]...
This is what i do, i first export the data to excel then i import that excel file to another datagrid, this is just for testing cuz i will be getting excels from another computer same program, anyways, there are 2 columns that wheni import the excel file, it doesnt read it it shows in datagrid with no value,empty cell, i dont know why, because in excel the values are there, and all of them are strings sometimes it contains numbers, but theyre manage as string.
I added the images of excel file after i export the datagrid
and image of datagrid after i import that excel file NOTE THE EXCEL VALUES IN EXCEL< and empty in DATAGRID
Excel Read-Write With Objects?
Mar 30, 2010I have Excel file (.xls) with objects (graph, combox...) and I must open this dokument write some data and save copy.
I was tried some .dll's and everything gone fine only I lost objects.
Excel SQL Read And Wirte To Same Line
Jul 29, 2011I am reading from an excel information from column 'D' where something in column 'E' is <> to something. This is fine, but I want to change the value of column 'E' once it has read the information from column 'D' so that next time it reads it, it wont read that same line again, because column 'E' will have changed value.[code]This line is the one that doesnt do anything, but I want it to update the value of column 'E' with Yes: cmd. Command Text = "UPDATE [Sales$] SET (Delivered) values (Yes)"Also, can anyone spot why it may be missing out the first of the 'SELECT' queries.This line works:"SELECT Phone FROM TblContacts WHERE " & Event_query & Condition & Abs_value however it doesnt get the first one ever, but all the rest that meet the query?
View 5 RepliesHow To Read Changes In Excel File Into Application
Apr 6, 2011I 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 RepliesHow To Read Excel File In 2003
Apr 6, 2010The 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 RepliesOledb To Read Excel File
Jun 22, 2010I 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.
[Code]...
Read A .txt File And Export To Excel?
Jan 6, 2012I 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]....
Read Data From Excel File?
Jul 21, 2011I'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]...
Read Excel Cell From VB2008?
Oct 2, 2009how can i read an excel cell in VB2008?1) i do not have to open MS excel.2) i want a message box to pop up the data in the cellfor example, the data in cell A5 is 586when i press a button, a messagebox will show the data in it.
View 4 RepliesRead Excel Data To Sql Database?
Nov 15, 2011I 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.
----------------------------------
Private Sub frmProcess()
Dim app As New Application()
Dim book As Workbook
[code]....
Read Excel File Without Worksheet Name
Feb 23, 2008I 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?
[Code]...
Read Excel XLSX Through DotNET?
Nov 22, 2011how to Read Excel XLSX through DotNET?
View 1 RepliesRead From An Excel File That Is Already Open?
Jun 6, 2011I 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?
Read From Encrypted Excel File?
Sep 22, 2009Working 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.
Read Values From Excel Cells
Apr 28, 2009[code]i need to read data from specific cells and assign them to other cells.
View 4 RepliesUse Jet Engine To Read Data From Excel In Vb?
Aug 26, 2010how can I create a connection to excel file and view the result in vb. I am using visual studio 2008?
View 7 RepliesVS 2010 How To Excel Read/write
Jun 22, 2011I have an excel database with one column and thousands of rows of "number" data. I need to import the data into my form read the first entry, run an algorithm then move the result to the second column then move to the second entry and so on. I am having issues with where to begin. I am able to convert the excel database to a text file if it makes it easier.The algorithm that needs to be ran consists of reading each character one at a time and is as follows:ENTRY example: 12358458754The characters 1,3,8,5,7,4 need to be summed then multiplied by 3. These are all the characters starting with the first one and skipping every other one. I will call them "odds" (not referring to numeric value)The characters that are skipped, I will call them "evens", need to be summed together then added to the result of "odds".
View 20 RepliesWhy Excel Read Skip First Line
Aug 24, 2011There is a program that reads an Excel file using OLEDB and converts it to a tab delimited text file. This loop handles the conversion.
While reader.Read
Dim count As Integer = 0
Try
While (True)
temp = reader(count).ToString + ControlChars.Tab
output_file.Write(temp)
count += 1
End While
Catch ex As Exception
output_file.WriteLine()
End Try
End While
Not the most elegant code for sure, but it reads in each cell one by one, then throws an exception at the end of the row to write a newline. The only problem is that it skips the first line of the Excel document.
Cannot Read / Write Excel 2007 Files
Jan 21, 2009I use a code like this which perfectly works and creates MS Excel files so I can create Excel files and save my data into it.I also use a similar code to read the data, however, it only read and writes Excel 97-2003 files, and does not support Excel 2007 file format![code]...
View 2 RepliesCannot Read Numeric Values From Excel File
Sep 25, 2009I am trying to read data with a test routine from a fairly simple 3rd party Excel file. The file has three sheets and was created by Open Office 3.x as an 'Excel 97/2000/XP .xls' file. The later, still to be programmed, application must later run on machines with Windows XP Professional using the 2.0 .net framework and no Office package installed. The content of the file does not need to be modified by the later application. For some reason, numeric values are not read correctly. They "convert" to DBNull. I've searched around a bit but not found a 'simple' solution for solving this problem. Adding 'IMEX=1' or 'HDR=Yes;IMEX=1' to the connection string results in an error 'Installierbares ISAM nicht gefunden' (installable ISAM not found).
Based on various examples I've found, I've written the following test code:
Option Strict On
Option Explicit On
Imports System.Data
Imports System.Data.OleDb
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code] .....