Reading Data From Excel Into VB 2008?
Mar 10, 2008
I'm a new VB programmer, although I have a decent background in java.Anyways, I'm learning VB and I'm trying to read data from an Excel file using VB 2008 and can't figure out how to accomplish this. I can't seem to get any data from the Excel spreadsheet to display in a simple Windows form. Also, there's a decent amount of data in the spreadsheet so I was wondering if it makes sense to just read data as needed from the excel spreadsheet or if there was some type of data structure that I could import the entire Excel spreadsheet into and do my analysis from there.
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Mar 4, 2010
I just tried to read data from an excel sheet. I just found some code on net. But it is not working for me. I'm unable to debug, since i don't know how to make use of the ADO.Net [Code]
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Jan 24, 2012
I'm developing application in VB.NET 2008.I'm reading data from Excel through OledbConnection. Here data are reading sometimes perfectly but sometimes it is missing to read some data.
Example :In Excel ,I have 79 columns in excel and 4 rows , first 3 rows are headers so after import i'll delete that rows and actual data starts from 4, so here i have only one row.After Reading through oledb, that dataset's datatable has only first 3 rows( first row became header and 2 & 3 row only in datatable, its ignoring 4th row)
[Code]...
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Nov 10, 2011
I have a question about reading data from txt file and importing(transfer) to the existing excel file.for example I have "test.text" which includes some numbers listed below.[code]I want to put each number to separate excel cells by using Vb.net.
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Oct 5, 2011
I have never read from an excel file in VB.NET before so sorry if anything is off.I am downloading an .csv file from a vendors ftp service that has 8 columns ( style # - mfr.item # - description - metal type - availability - center weight - total weight - retail value )I am trying to retrieve all data in the rows bellow style # and retail valuethere are roughly 4,649 rowsI am not sure how to do this.
I load the excel file using the microsoft.office.interop.excel:
Dim eApp As excel.Application
Dim eBook As excel.Workbook
[code]....
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Jan 8, 2010
I want to create thread for reading data from Excel. I found this link.url...I download the sample project and tried to run the project.First I build the project using visual studio 2005 and add reference the NetFX20Wrapper.dll..When I run the project, I got error "ActiveX Component cannot create obect" in the Line "Set background = New NetFX20Wrapper.BackgroundWorkerWrapper"
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Sep 30, 2010
G'day all, I've been on google for far too long trying to figure this out, so hopefully somebody can point me in the right direction. I'm trying to write a program that will open an Excel spreadsheet and read data from specific cells while preserving datatypes, so that I can write the data to an XML file. The basic functions I need to perform reduce to:
[Code]...
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Mar 27, 2012
I am trying to build an app that can search column A in an excel document (with textbox control). In column B, I have info about the column A items. When a column A item is searched, I would like a textbox (or similar) to display info about it from column B.
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Sep 28, 2011
I 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.
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Mar 29, 2012
I have some trouble with opening a excel sheet and getting some data out of it.
I want my program to have a button, when pressed, gives a "select excel file" popup and then load the data from some cells into my sql database.
So, when opening a excel file the program should get the data from cell D3 to D8 and put that into the sql database.
I now have the following, but that will only open the excel file.
Public Class Form1
Dim oConn As ADODB.Connection
Private Sub ConnectDB()
[Code]....
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May 21, 2011
I want to import data from excel and move that to Datatable in VB.NET 2008. I wrote and working but its taking too long time.. for 1500 records its taking 4.40 min.
[Code]...
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Sep 5, 2011
In my application I read data (using data binding) from an Excel spreadsheet into a DataGridView. This works, but the data columns contain text fields (strings). I would like to set the data type for some columns to "Date" and Decimal. I cant do this on the DataGridView (error: cant change properties for data-bound stuff) and I cant figure out how to do it on the dataset or data-table that I bind to the DataGridView.The following is the code I use to read and bind the data:
Using con As OleDbConnection = New OleDbConnection(cs)
'
'open the OleDbConnection
[code]....
The commented out code (below the 'Todo: comment) causes a additional table, but I want to change the table with the data.
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Aug 25, 2011
I use an OLEDB connection to read from an excel database, and this loop to read in all of the data from each of the columns
While reader.Read()
For i As Integer = 0 To reader.FieldCount - 1
temp = reader(i).ToString + ControlChars.Tab
output_file.Write(temp)
[code]....
Some of the columns contain date information, which are read in fine (usually as a string "2/20/2011" or so), but the headers of those columns are read in as a blank "". The headers for all the other columns read in fine, but not for the date containing columns.
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Aug 30, 2010
I have a .csv file (created by external program). In my vb.net application I want to read the last cell value. External program updates the last cell value every 3 sec.For this I use the below code. But cpu usage increases (because timer event opens&closes new excel sheet every second)I was successfully doing this with vb6 without any problem, but with vb.net I'm stuck.
[Code]...
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Jul 1, 2009
I am trying to read some data from an Excel 8.0 worksheet using OLEDB thusly:(Warning - contains curly braces)
Code:
DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.OleDb");
using (DbConnection connection = factory.CreateConnection())
{
[code]....
The problem is that for some columns it sets the data type to be Double even though the spreadsheet column format is "Text" and teh column contains non-numeric data. Then when it gets to that cell it returns DBNull instead of the text value.
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Dec 2, 2009
I have Visual Studio 2008/VB application that opens Excel workbooks, reads all the sheets, and writes some data to a SQL database. I need an easy way to determine if a sheet has any data on it. By default most books has three sheets (Sheet1, Sheet2, Sheet3) and usually, but not always, my books have data only on sheet1. But i need to look at alal sheets to check for the existence of data. I know I can do a nested for loop from 1 to columns.count and rows.count, but that would take a good bit of time since those numbers usually are something like 256 and 65K.
Is ther some easy way to determine if there is any data on the sheet? If there is, is there an easy way to find the "first" cell with data in it?
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Mar 29, 2010
currently i need to use 4 different texts files in order to read data and run my program, is there any way that i can just use 1 text file or 1 excel spreadsheet? here are my codes now.
Dim File1 As New System.IO.StreamReader("C:Documents and SettingsUserDesktopWindDirectionLanding.txt") 'Calling out the file.
Dim File2 As New System.IO.StreamReader("C:Documents and
[Code]....
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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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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
[code]....
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Sep 9, 2010
I want to reading in a excel file and extract the sCodenumber sDescription ans the sStatus and store them in a array : StatusComposeArray(5200) As MyCompose. After this I need this array for comparing outside this class. But as can you see the array is defined inside the sub: ReadingIn_ExcelFilesCompose [Code]
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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
[code]....
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Jun 16, 2009
i have read a lot about reading data from pdf but still very confused. i have to gather data from a invoice which is in a pdf format and store it in the database now the invoice contains text, tables, signature and barcode. this i have to again print after adding some of my data in another format and hence i need to get the data from the pdf file.
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Mar 10, 2010
I have a problem with importing an excel into a data grid.
Here is my code:
Try
Dim _Obj As New ExcelConnection.ExcelConnection
_Obj.ImportAttendence("c:Info_pc.xls", DataGrid1)
Catch ex As Exception
End Try
In the excel i have numers and text and "Service Pack", "Processor Speed" and "Numar procesoare(Number of processors)" and the values for these are numers. in the data grid when i import the excel those values doesn't appear, i receive the value "null".
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Sep 25, 2009
I am having some trouble thinking of a way to do this, what i have is an .xml file loaded and data read from it and used in my application, the thing is the data varies in each .xml for example:
vb.net
Dim XMLD As New Xml.XmlDocument
'// Find and load the XML file
XMLD.Load("Debug/xForm.xml")
[code]....
The fields vary on application execution, there maybe 5 fields with data one time, then 13 the next etc, if only 5 fields have been written to the xml and i load them all like above i get an error (because that data hasn't been written)is there a way to load the data dynamically based on how many fields have been written kinda thing?
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Apr 15, 2009
Say I have the data below:
Dim dateToday As Integer = 16
Dim dayToday As String = "Thursday"
Dim monthToday As String = "April"
[code].....
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Aug 30, 2009
I am using this
Dim con As New OleDb.OleDbConnection
Dim ds As New DataSet
Dim da As OleDb.OleDbDataAdapter
[Code].....
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Apr 6, 2012
i would like to know a method that can read data via rs232 ( i use pic 18f452 to send 5 values(pression, temperature, current, voltage and solar radiation ) of Adc conversion )i successed to read one value at first ( sending one value via pic) , but i couldn't read more than one at end
so, question is how to do that ? how to separate between the data?
[Code].....
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Dec 22, 2010
I typed this question once already, hit preview, and somehow never got the preview and lost what I typed. It has been that kind of a day.So here is my quick overview then I am going shopping. I am using OLE DB to select from an excel spreadsheet. It has over 15000 rows and 33 columns. Sometimes even when a cell is not null, it is returning a null value. If I just do a "select * where [termination date] is not null", for example, it will return no rows even though I can see with my own eyes that sometimes termination date is not null.
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Jul 28, 2009
Is there a way to set BitConverter to produce Int32 values from BigEndian-encoded bytes?I feel like there might be a way to temporarily "set" the encoding to BigEndian before calling BitConverter, but I haven't figured it out.Right now I'm just reversing the 4 bytes before calling BitConverter, I guess I could create my own function that adds the bytes with the appropriate multiplier, but it seems a little inelegant if it can be done simply with BitConverter.
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Nov 29, 2009
I have a text file that the first part of my program writes data to, but for this second section, I need to read that file and use pieces of that data and average them out. The text file is setup up with 90 lines of data starting with the first 9 lines containing data and the 10th is a blank space. I need to read line 6, 8, and 9. I need to Loop through the file so I am using the Do While Loop. Where I am confused is when using the For...Next Loop to tell the program to read a specific line. If you have any info that can lead me to the answer that would be great. I would prefer you just point me in the right direction because I would very much like to somewhat figure it out in the process.
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