Manipulating Mutiple Excel-like Spreadsheet Data In .NET
Apr 21, 2009
I have an project which was written in VB6 and made use of the Spread3.0 component to display multiple large data from database in spreadsheet. My objective is to convert this project into a VB.NET current version which would not use the third party component but can possibly use a freeware that does similar if not all the functionality.
My question is, are there any freeware that is available in .NET for such spreadsheet-like manipulation of data programatically? I have come across dsoFramer but this only allows the display of the data in an IE frame. I would like to jus embed the content into my existing form.
Also this freeware must be able to handle formula and user-editing as well as multiple cell type such as combobox/checkbox etc.
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Sep 1, 2010
I have an project which was written in VB6 and made use of the Spread3.0 component todisplay multiple large data from database in spreadsheet. My objective is to convert this project into a VB.NET current version which would not use the third party component but can possibly use a freeware that does similar if not all the functionality
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May 4, 2011
The code below creates multiple folders based on different file names and moves those files into the new folders. For example, files ABC and XYZ are moved into a newly created folder named ABC and XYZ. I want to advance the code to allow slightly different file names to go into a common folder. Example, I want file ABC_rock, ABC_soil, and ABC_water to be put into a folder named ABC still, AND file XYZ_rock, XYZ_soil, and XYZ_water to be put into a folder named XYZ. I do not want a separate folder created for ABC_rock, ABC_soil, and ABC_water.
Dim strOutputLocation As String = "C:Temp"
Dim rootPath As String = strOutputLocation
For Each filepath As String In IO.Directory.GetFiles(rootPath)
[Code]....
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Jun 6, 2009
What I was wondering is if I had a ListView1 with 1 row and 5 subitems, could I export that whole row into an Microsoft Office Excel spreadsheet, by defining in which Excell row/column I want to add each subitem into?
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Dec 24, 2009
So I need to create a windows form that is able to generate reports by querying a SQL Database or SQL Server. There is data in the databases that will be put into an excel file from whatever columns from a specific table I need. I need it to be a dynamic query that is probably hard coded into the application because I might need to write other queries at some point to generate different reports that need different columns.
What I need is somewhere to start or some code that I can look at because im not very familiar when it comes to vb.net/excel. I need code to get all that data from the database and put it neatly in an excel file and I would like to specify what columns in the excel file all the data goes under.
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Jan 28, 2011
I am trying to import data from an excel file but the spreadsheet name is causing problem. If I use 'Sheet1' as the name of the spreadsheet from which I want data, then it works fine but I want to change the name of the spreadsheet to the name which has spaces like 'PROJECT SHEET'. Please guide
Dim ExcelFile As String = "C:ProjectFile.xlsx"
Dim myDatabasePath as string = "C:ProjectsDatabase.mdb"
Dim excelConnectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + ExcelFile + ";Extended Properties=""Excel 12.0 Xml;HRD=NO"""
Dim excelConnection As New OleDbConnection(excelConnectionString)
excelConnection.Open()
[Code]...
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Jun 22, 2010
I am reading data from an excel spreadsheet. The column data which i am reading from my spreadsheet reads as follows:
integer
integer
integer
var char
integer
[Code]...
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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].....
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May 12, 2010
how to display the data in an excel spreadsheet in a DataGridView?
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Dec 6, 2009
I am writing a windows application that interacts with data stored in an Excel Spreadsheet. I merely want to change the text value of a cell that already has text written in it.
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Jan 12, 2012
I am trying to export table data to an excel spreadsheet.It would be beneficial to have filtering pull-downs in the spreadsheet.I would be will to purchase any software tools to make this task easier. Otherwise are there some tutorials for accomplishing this?
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Jun 19, 2012
I'm currently trying to import data from an Excel document to a list in Visual Basic 2010 Express. The Idea is to have the data easily modifiable by the users. I have looked quite a bit online and all of the examples seem to reference either an "Imports Microsoft.Office.Interop.Excel" or "Imports Excel". When I try to use the I get "(no correction suggestions)".
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Nov 22, 2010
I 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?
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Oct 8, 2010
I am new to VB.NET. How to import data from excel spread sheet into database (SQL Server Management Studio Express 2005) by clicking a button in windows form application using VB codes (visual studio 2010).
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May 17, 2011
I'm using an OleDbDataReader to loop through my imported excel file and it gets everything in the file except for the first row. How can I specify that I want to see this header row?
[Code]....
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May 25, 2007
I have a program that currently takes data and writes it to a MS Excel spreadsheet. (automatically opens the program, creates the cells, and fills them with data)
I would like to add an additional feature to my program that offers support for OpenOffice.org's 'Calc' spreadsheet program. (so users without MS Excel can use the application) So I am basically asking if anyone knows how to automate OpenOffice 'Calc' from VB.net. (I am using Visual Studio 2005)
I have searched on the OpenOffice forums but no one seems to know the vb.net code for this. So I was wondering if anyone here has done this, or would know how to do this.
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Nov 11, 2011
I have a VB.Net program that reads in a flat file, and then parses line by line, formatting the data into different spreadsheets in an excel workbook (each line can be any 10+ different record types so I parse and put in appropriate excel sheet).
For smaller sized flat files (under 10mb), the parser works great. However, I am trying this on a file that is over 120mb (400k+ lines). While running, I will get an OleDBException saying that the spreadsheet is full. Now I am pretty confident that Excel can handle a much larger data set than a flat file. So I assume this exception is not giving me the true story as to what is really occuring.
I open a connection, and then parse each line in the file, inserting each row into the excel file. I assumed it would be bad performance wise to open/close the connection between each insert. Could this be causing the issue? Any ideas what I need to do to handle such a large file? There are cases where the flat file can be over 500mb.
To actually do the insert into excel, I am just doing the following (I construct an sql query based on the type of row and values parsed):
Dim conn As New OleDbConnection()
conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExportLocation.Text + "" + importFileName + "-PVF.xls;Extended Properties=""Excel 8.0;HDR=YES"""
[Code]....
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Mar 23, 2005
I am trying to gather some information about exporting data contained in a datagrid to an excel spreadsheet. I am not using ASP. The number of rows and columns are not set(fixed). If someone was able to point me in the right direction or even better a quick example. I have search through previous threads and am unable to find any that relate to exporting from a datagrid on a windows form to an excel document.
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Apr 6, 2011
I am trying to fill a DataGridView box with data from an Excel2007 spreadsheet. My code below connects to Excel2007 workbook but then errors and gives this error
[Code]....
Where have I gone wrong and how can I fix this, as I want to show the data in the DataGridView and then move it from there into my SQLServer DB?
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Jun 23, 2011
How do I link data in an Excel spreadsheet to a chart object in Visual Basic 2010? Really basic here....I just want to draw a single simple line chart from a single column of data. Is it easier just to read the data into an array (which I can do) and somehow get it into the chart?
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Jul 23, 2009
Exporting Data from Gridview to a excel spreadsheet? How do I do it? I google for examples and all the examples I found are for ASP.Net but I am doing a windows app using vb.net.. Is there anyone that can provide me any example of exporting data from gridview to a excel spreadsheet?
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Apr 6, 2009
I'm trying to write data from an excel spreadsheet to an Access database. When i run my program a message appears saying that the correct number of records have been saved, however when i check my access database no records have been written to the database table.
The following is a copy of my code (sorry i've just edited it to get rid of the white space that was added when i included it here for some reason.The code for writing to database:
Public Class Form1
Dim connection As OleDbConnection
Dim Command As OleDbCommand
[code]....
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Oct 25, 2008
I have an application which opens one of several excel templates, fills a datagrid view with Excel Named Range data. Once the data is modified in the application I neet to save it to an excel spreadsheet. I currently have the following working:1. This sub writes 2 columns of data (Ingredient) and (Result) from those named ranges and places them in the datagrid
Private Sub CboBoxTypeCofA_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CboBoxTypeCofA.SelectedIndexChangedWorkbookTemplate = ""CofABook = ""
[Code]....
This code works and the only problem is that after running the code the excel application does not close.Now I need to write the completed updates from the datagrid view and the other controls back into a workbook.Ive been searching around but have not found the proper way to do this and how to kill the oexcel application in the code above.
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Mar 30, 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 spreadshee
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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May 27, 2011
I've cracked the reading Outlook emails from a specific folder in a VB 2008 program but now I need to append my parsed data to end of an existing Excel Spreadsheet. where I can look for some code samples of now to do this?
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Nov 12, 2010
I have a flow document table with text in it. The text some timess just on one line , often on many lines, that means it could include a return and a tab spacing (all in the same cell).I want to put the data from the table to the clipboard in such a way that i
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Mar 10, 2009
I am using Visual Studio 2005. I am using a data reader to read an Excel spreadsheet and want to update a SQL Express table. The datatypes in this table mimic a software application I will eventually be passing data to and are listed in the comments in my code. No matter what I do or change, this will not run. I even populated my spreadsheet with zeros and this will not run. I have found many suggestions on the web and tried changing things but nothing seems to work. I also don't know specifically which variable is causing the error or the proper way to make sure there are no blanks in this spreadsheet.The error says "conversion from string "" to 'Double' is not valid Here is my code:
Public Sub btnUpload_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpload.Click
'Connect to the Excel spreadsheet
Dim xConnStr As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=" & txtFileName.Text & ";" & _
using a data reader to read an Excel spreadsheet and want to update a SQL Express table
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Jan 10, 2012
I'm trying to export a datagridview to Excel and open the Excel spreadsheet (not SAVE the worksheet).
Public Sub ExcelRpt(ByVal DgvName As GridView, ByVal url As String)
Dim xlApp As Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook As Microsoft.Office.Interop.Excel.Workbook
Dim xlWorkSheet As Microsoft.Office.Interop.Excel.Worksheet
[code]....
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Jul 7, 2011
My script is pulling some information (filename, date, &c) from a server that contains only (nearly) identical excel files generated by a separate application whenever it is used. The goal is to find out who is using the tool and how often.
I need help with two things: extracting info from within the excel file, and appending the results to the SAME excel file each time it's run instead of creating a new file each time.
Here is what I have...
CODE:
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May 5, 2012
I'm setting up a console application that ...
1. Executes a stored procedure that populates a SQL table for reporting purposes.
2. Opens an Excel Workbook.
3. Refreshes the Workbook.
4. Saves the Workbook.
5. Closes the Workbook.
6. Sends the Workbook as an attachment in an e-mail using the SmtpClient class.
Now, steps 1 through 6 are inside of a loop as I would like to use the same workbook for all my report refreshes. My perfect solution is to iterate this loop as many time as needed to have all my reports automatically sent via email as an attachment. The first time through the loop, it works perfectly, however, the 2nd time through the loop, I noticed when the application opens up the workbook, the workbook opens up as a read-only copy even though I properly closed the workbook prior to re-opening it.
I've tried to force the open as read/write but then, the 2nd time the workbook loads, an exception is thrown. I'm on Windows 7 and I noticed that the folder properties has a read-only check box which I make sure is cleared before running the application but then when I stop/pause the application to inspect the folder properties, the check box is checked again. I'm not sure if this is why I'm having issues when I open up the Workbook a 2nd time or not.
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