I am trying to manipulate an excel 2000 spreadsheet in visual basic 2010 express with the following code but cannot get it to 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
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For some reason I get "Exception from HRESULT: 0x800A01A8" from the following code only if I open the XLS file outside of the application I'm coding while this code is being ran. Can anyone advise as to what might be occurring and how to fix this? Right now when my application launches I just output a messagebox informing the user not to open Excel while the data is being loaded. I'd like to correct this problem.Another thing is that when I open the XLS file externally after my application loads an instance of the file, it doesn't prompt to open it as read-only.
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Initially my app worked with excel fine, now it causes my computer to reboot only after Excel has been opened (two or more times). I have opened and closed Excel files 20+ times without running thru either of my apps (they all uses identical code for excel) and it has never caused a reboot or a crash.
run either of my apps and have the app control excel has become a crap shoot, it will reboot my computer. Adding to that I then have to do a manual shutdown because the reboot process after is unstable. (System doesn't respond properly). My code in this app is small, should make for a good example. I can provide the entire project to anyone who would volunteer to test it. (First I need to know how to send the project).
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Can anyone recommend an ODBC driver for Excel in VB 2010 Express? This is a 'legacy' problem having just being forced to move from VB6 to 2010.
View 1 RepliesI want to edit the rows and columns of an excel file using vb 2010 express. NOTE : I dont want to open .exl file but want my program to read and edit them according to user. PS : I want to edit them according to cell number.
View 6 RepliesI have created a picturebox in a form that I want to click on and then it would send me to a excel file that I already have created. I don't know if it is even possible. Do I need to use a button instead?, or am I just way off all together.
View 2 RepliesI have created an excel 2003 file using visual basic 2010 express edition with access as backend. The excel is created using a select into query. I would need help to protect this excel file once it generated using visual basic 2010 so that the users cannot edit the same.
View 1 RepliesI am trying to make a user account SQL database work with Visual Basic 2008 Express for login purposes, i.e. usernames & passwords. Plan is to host this server so people can login to use the the application and verify they have a valid account. I would like to host all the account information in SQL due to the possiblity of hundreds of users at any given time. I also need the ability to add data to the database for users registering for the first time. The SQL server will need to be able to access the SQL Server databases remote via WAN.
View 3 RepliesI tried to start using VB 2010 Express with a program I originally developed with VB 2005 Express that I moved to VB 2008 Express successfully a couple years ago. It uses a database file (*.mdf) that is on the computer ( not out on a server). When attempt to run the program in debug mode, I get the following error "An attempt to attach an auto-named database for file C:Documents and SettingsTomMy DocumentsQuizzing StuffQuestion Database 2010QuizQuest ionGameQuizQuestionGameinReleaseQuizQuestionDB.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share."
I first made a copy of the entire project folder that was working in VB 2008 Express and gave it a different name. In VB2010 I opened the project in the copied folder and it said it successfully converted the project. I am able to open the Data Source inthe Designer and see the database structure as I expect. I think the project is still using SQL Server 2005 Express (because it is what is checked in the list of prerequisites on the Publish tab).
Note, I have programmed off and on for many years, but fairly new to using databases and SQL Server.
Here is the scoop: I am trying to make a user account SQL database work with Visual Basic 2008 Express for login purposes, i.e. usernames & passwords. Plan is to host this server so people can login to use the the application and verify they have a valid account. I would like to host all the account information in SQL due to the possiblity of hundreds of users at any given time. I also need the ability to add data to the database for users registering for the first time. The SQL server will need to be able to access the SQL Server databases remote via WAN.
View 1 RepliesI am trying to re write a VB6 program using MS Access, many years ago, using VB 2010 express and SQL server 2008 R2 Express. I have a database with several tables, which I created using the designer. I am able to connect to the database and select data and display it in textboxes etc in vb code. What I have not been able to in code is to INSERT rows DELETE rows or UPDATE any data in the tables. I can do any of these operations using the Query Designer, but I want to do it in code. I can post some code if necessiary, but I thought it might just be some property that I had not set in the designer.
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Is VB Express 2010 slower to compile and run that older versions of VB Express? I've installed it this weekend and it seems a little sluggish on my quad core computer with 1 gig of RAM. I have VB Express 2005 installed for my students at school and it seems to fly just fine. Those school computers are older P4s with 512k of RAM.
View 7 RepliesI am using VS .net 2003 and developing a program that calls Excel. The development computer only has Excel 2003, and the target machine only has Excel 2007. Would it be possible to install Excel 12 Object Library in the development computer without installing Excel 2007?
View 4 RepliesI'm trying to upgrade a VB6 app to VB 2008. I have read the article in the tutors corner about automating Excel from VB but I cannot get it to work. Heres what I have done:
1) set a reference to the Microsoft Excel 12.0 Object Library
2) Added "Imports Excel = Microsoft.Office.Interop.Excel" to the top of the module
3) in a routine I have added: Dim X As New Excel.Application Here's where I get an error: Error 75 'Application' is ambiguous in the namespace 'Microsoft.Office.Interop.Excel'.
I use the following code snippet
Dim exlapp As New Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook_new As Microsoft.Office.Interop.Excel.Workbook
Dim strOriginal As String
strOriginal = Server.MapPath(Request.ApplicationPath & "/Attachments/") & "abc.xls"
xlWorkBook_new = exlapp.Workbooks.Open(strOriginal)
The code hangs in the last line. It works fine in the development environment. i deployed in windows server 2000 ,where I get this issue. the browser goes half way and throws the below exception after some time
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I have set the identity impersonate to true in web config. This should be mostly an access rights issue.I have even provided access rights for the "everyone " user in the excel file and as well for the interop component. Please post ur valuable comments.
there Dream in Code Community! Im an okay programmer as far as skill right now I am still learning as we all are I need some help from some experienced VB.NET programmers in the community, Here is the scoop: I am trying to make a user account SQL database work with Visual Basic 2008 Express for login purposes, i.e. usernames & passwords.
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I'm trying to create a pivot table by opening an Excel file from my drive.But I'm receiving the error saying "Object reference not set to an instance of an object".[code]
View 1 RepliesI decided to to convert my excel macro in a exe file using visual studio 2010. In excel macro method find is present like this:
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Basically I've coded an Excel 2007 project in VB.NET 2010 that allows you to create charts with a fair amount of interactivity. I want the user to be able to save and reopen this workbook and still have that interactivity in any already-created charts, so they don't have to re-create them.
When I create the charts, I use Sheet1.Controls.AddChart(...), which returns a Microsoft.Office.Tools.Excel.Chart with which I can handle events and such. However, when I reopen the file and look through the Sheet1.Controls collection, there are no Chart objects. Accessing the charts through Sheet1.ChartObjects.Chart gives me Interop Charts, when I need the Tools Charts.
following error message:
Method not found: Void Excel.Range.set_Value(System.Object,System.Object)
I have worked with Visual Basic in the past, but never using it with Excel
View 3 RepliesIn my application I want the user to enter information that can be stored in BOTH an SQL database and and Excel spreadsheet. I tried research but can't find the code to include or import Excel
into my project.I've seen examples like:
Dim excelApp As New Excel.Application
Dim excelWB As New Excel.Workbook
etc....
but VB doesn't recognize it as a shared namespace. Is it possible to load a spreadsheet into a VB project with express edition?
I have a 20 x 20 Excel table that I want to transfer to a numeric array in VB 2008 Express.
View 1 RepliesI got the following code snippet, but it shows errors in 3 places, the error is type "item name" not defined. I underlined and made bold where the errors show up below'Firstly retrieve data from Access database
Dim con As OleDb.OleDbConnection = New OleDb.OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:myDB.mdb")
con.Open()
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How do I start in visual basic 2008 express, a existing Excel application? e.x test.
View 2 Repliesi'm using visual basic 2008 express edition and having a problem in saving the data i've added in datagrid to excel. i use inputbox to add data into the datagrid. when i click the save button, the data from the datagrid must be save to excel. this is the code i get from some forum and i already edited it but it only saves the last data/row i inputted.
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How do I transfer data from Excel 2007 into Microsoft SQL Server Management Studio Express as shown below? I try copy and list of data in excel as shown in the screenshot.. But when I paste in Microsoft SQL Server Management Studio Express.. Only the first result is past inside..
View 2 RepliesI added the reference and the "Imports" line, and I get the folowing error on the line
Code:
Dim oApp As New Excel.Application
Dim oWB As Excel.Workbook = oApp.Workbooks.Add()
Dim oWS As Excel.Worksheet = CType(oWB.Worksheets(1), Excel.Worksheet)
COMException was unhandled
Old format or invalid type library. (Exception from HRESULT: 0x80028018 (TYPE_E_INVDATAREAD))
I'm using VB Express 2008 and I would like to open an excel file and save it with different name file. For example, I would like to open a file in
C: est.xls
And then I want to save them with different file name such as
C: ry.xls
I am trying to read off some cells from an Excel File. I can't figure it out. Here is my code:
Public
Class TOC
Dim ExcelObj As New Microsoft.Office.Interop.Excel.Application
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After making WorkSheetObj I dont know what to do.. I am trying to dynamically change the Texts of Four buttons. The text values are to be to read off of Excel cells.