How Do Ito Interact With An Excel File
Feb 17, 2011
Im not understanding something or I am missing something.I can't use: "Imports Microsoft.Office.Interop" as it is not recognized.How do I interact with an Excel file? None of the examples I have viewed have been able to work.I opened one VBform (only the form) by ".paul." (in his sig) but could not get it to convert to 2010 and although I was able to get his code loaded I could not use any of it.The strange part is in his module there were no errors, import (copy and paste) any of it to my project and everything had errors.I believe .pauls.'s example was:"Imports excel=Microsoft. Office. Interop" which was not being accepted in my project.
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Mar 2, 2012
I may be the only person still automating excel this way and I am looking at doing it in ways that better handle COM objects and such, but for now I just importMicrosoft.Office.Interop.Excel and go for it. Something that gave me a lot of grief at first was hanging excel.exe processes, but there are tons of resources online for fixing that. At this point I am pretty confident in my abilities to handle it.One thing I did notice and was wondering about is how does closing a windows forms application interact with excel.exe running in the background and likely more specifically the garbage collector. I have written quite a few excel automation projects and noticed that after I run my program .exe and it has completed there is an excel.exe process that hangs on until I close the pop up window from the windows forms application. Why is that happening?
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Apr 28, 2010
I'm trying to write an application in VB 2010 that will allow me to send out stop and start commands for two services. I can get this to work in a batch file but not in VB, using either NET STOP and NET START and also using SC.exe Stop and SC.exe Start. But I don't seem to get anywhere if I try to use this in VB. So far this is what I have written, using the Print Spooler service as an example. The two services I actually want to stop and restart are the Server and Client services for efpos terminals that are attached to the computers. The service fails from time to time and I want to provide a solution for our users that is quick and easy for them to use, and most importantly doesn't require them to restart the computer, while they have a line up of people waiting to pay.
Code:
Private Sub SpoolerStop()
' Stops the spooler service
Dim StopSpooler = "C:windowssystem32sc.exe stop spooler"
End Sub
No matter what search terms I try in Google I get very little on using VB to interact with Windows Services.
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Feb 24, 2010
I am using asp.net oledb to export information to excel file. I encounter problems when the information to export becomes too big, in this case the code I have given below, the excel file generated becomes an empty spreadsheet.If I changed the loop to 1123 for insertion of the rows. The generated excel file is fine, 1125 rows, and 4 columns shown.A test program in windows form is also working fine regardless of how many rows.[code]I couldn't find a solution to my problem as well. What I did eventually was to run the process using another separate windows service. The code works perfectly fine running from a windows form or service program, but not asp.net, not sure why.
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May 8, 2012
I have this issue that occurs with me and driving me crazy i have a report that contains thousands of records and i need to export it to excel , but the excel normal extension .xls
is showing missing records at the end of the file , so i save my file as an .xlsx extension it saves correctly but when i open the file it generates an error
"Excel cannot open the file '<var>filename</var>.xlsx' because the file format for the file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file."but when i test the file i drag it and open it in an empty notepad all the records shows up correctly
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Oct 6, 2009
I'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'.
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Jan 26, 2009
I'm working with vb.net 2008. My application generates 1 excel file (with login details etc). The application will store user results for various sections into csv files. I'm trying to combine the csv files into the excel file. I'm trying to get this to work with one csv file initially ...but I am ending up with a blank Excel file. This is what I've tried so far:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim oExcel As Object
[code].....
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Jan 26, 2012
I'm working with vb.net 2008. My application generates 1 excel file (with login details etc). The application will store user results for various sections into csv files. I'm trying to combine the csv files into the excel file. I'm trying to get this to work with one csv file initially ...but I am ending up with a blank Excel file. This is what I've tried so far:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim oExcel As Object
[code].....
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Aug 3, 2009
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
[Code]...
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.
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Mar 5, 2012
I have a project that has a need to display a Excel file in second window, but because other controls are needed, simply launching excel is not sufficient. Right now I do not know if the target machines have excel installed but I know with certainty that if they do it would be 2010, is there any method or library that allows you frame your own form around an excel window?
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Jul 13, 2010
I have an application the contains several excel files bundled with it. I'm not opening the files and processing them within my application. These files contain a data-connection to reload all of the pivot-tables within each excel file. I have a 'link' on my form, that when clicked, it determines which file to open and calls a sub using filename and executing Process.Start(filename) for any excel file I want to open. I have no problems opening any one of the files and then exiting excel.
The problem is when I 'close' a file, but don't exit Excel; then try to open another file(clicking link on form)... it creates a new instance of Excel.
I know from experimenting that the fileopendialog form will 'reuse' an existing Excel instance, IF it does not already have a file open.
How can I do the same thing without using the fileopendialog?
I don't want the end-user to have access to the folders where these files live. That's why I have multiple 'links' on my form, one for each xls that already exists. I just want them to be able to click on a link and the xls file opens AND if they choose to merely 'close' a file and not exit... Don't create a new instance of Excel, but re-use the existing one.
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Mar 10, 2009
I took oledbconnection with excel file, after disposing this connection i m still unable to open that excel manually,It shows some access error.
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Feb 7, 2012
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]....
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Feb 25, 2010
I need to create an excel file from the database records. I fetched and put the data in an excel file and tried to save that file as follows.
[Code]...
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Mar 12, 2010
Have a Windows app that needs to interact with a stand alone program that is accessed using cmd.exe. From Windows app, I can execute cmd.exe but cannot interact with it. Tried SendKeys, but this only sends one key at a time (sometimes more, but inconsistent) with multiple cmd.exe windows opening. Need to be able to send a whole command (string) to only one cmd.exe window.
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Feb 18, 2009
[URL]
I am trying to send keys to another program but i dont know how to write the code to do it and would i have to add a path to the other programs .exe?
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Nov 10, 2011
I am trying to Interact with VB API to Pro/Engineering.I got some information that we can add Reference Pro/E dll using Add Reference -> COM then we can use it.But I have issuse that how to get current session which is already runing in my machine? how it will find object of Pro/E (like one shape already created)?
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Feb 27, 2012
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?
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Oct 7, 2011
I need to export Chart(image) and grid (tabular) row data into excel file. I can not use automation because Office tools are not installed in my server. I've found a bunch of free/proprietary tools like:
NPOI
MyXLS
ExcelWriter (softartisans)
JetCell (DevTrio)
Aspose.Cells (Aspose)
But I do not know which one is better for my needs. I need to export not only grid row data but also Chart (image), thats why I am thinking about.
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Aug 30, 2010
Is there any way to insert an existing macro into a existing excel file without using the excel library ? I need this to set the excel to print whole work book .I cannot use excel library because it will be done online in the server where installation of excel is not possible. I can however use the c#.net coding . I am using NPOI to generate the excel.
the macro is given below
Private Sub Workbook_BeforePrint(Cancel As Boolean)
If printed = False Then
Cancel = True
[Code]....
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Jul 4, 2005
How to print excel file form vb .net without opening excel?
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Jan 28, 2010
i'm trying to save an excel file after I open my excel application. This is what I have so far:
'Opens the report
xlPeakDemand.Visible = True
xlPeakDemandWorkbook.SaveAs("C:Documents and
[Code].....
When saving as an xls it works fine but when saving as a htm its a disaster Just a bunch or symbols and stuff. BUT if I go into my xls document and Save As webpage from there, it works fine!
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Dec 23, 2009
i load a page via WebBrowser.document class, I want to literally "click" elements in the DOM using VB.net programmatically. I dont want to use the classic WebRequest class.how can i do this ?
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Jan 12, 2011
I'm looking to pick up a programming language. I've viewed some source code of both VB and C# and VB looks like something that I can pick up well.My question is can VB handle creating apps that will interact with the web? Things like signing me into accounts, downloading information, things of this sort?
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Apr 9, 2011
how to display and interact with a website, at the moment its just research on how to go about it. Once i start i may need some more assistance. But for now just research At the moment Ive came up with using WebClient and HttpWebRequest/HttpWebResponse to interact with website data. And i know VB.net has an inbuilt site viewer (just a wrapper for IE).The website im using is an Intranet page for doing VOIP calls. It uses a large collection of JS(jQuerry) mostly. I can probably get the dev to make a .php file to
<?php
print_r($_GET); Prints all GET variables in a quite readable manner.
print_r($_POST); Prints all POST variables in a quite readable manner.
?>
to find out what GET's and POST's there are, but I'm not sure if JS stuff gets put in as a GET or a POST as its in the DOM.So all in all,I'm wanting to make a "Desktop" variant of there client. So basicly just a viewer of the dial pad. And detection of new calls in the queue, things like that. So i want to read data from the website, display the dialpad(just showing a segment of the website) and send the request to accept a call(and maybe a few other small pieces of data).
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Aug 3, 2011
At user login, launch an app I have created. This app opens a web site in a webbrowser control, logs the user in to the web site, and parses links from the resulting web page. These links are links to launch citrix sessions on another farm.
Create another app that appears on the start menu for the logged in user. User clicks on this app, it communicates with the launch app to basically click the href associated with the citrix app within the webbrowser control. Then this app will go away...
I have already coded the first app and figured out how to click links within the webbrowser control. What I can't figure out is how to go about implementing the second app, that runs as a separate app, but communicates with the first app to do its business. I see a plethora of options such as MFC, AppDomains, RPC, and so on. My question is which is the best practice to have one app interact with another and have the other app take actions based on that interaction? I prefer to stick completely to vb.net.
A good example of how I would like this to work - a web browser (IE, FF, whatever) is open on the desktop, user clicks a link in an email, link opens in running browser. An action in the mail client causes action in the browser.
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Aug 25, 2011
I am trying to write a program that displays a medium opacity image as the topmost form. that I can handle, the part that is giving me trouble is that I want windows to "ignore" the topmost picture form and allow me to interact with any forms behind it (mine or otherwise) as if the see-through form isn't there. I have searched all over but cant seem to find a way to do this.
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Oct 7, 2009
Basically all I want to do is to interact with webpages using my programs.. To be more clear, Im trying to make a chat client, but theres one thing that I dont know how to do.. For example, I want to write "hello" and press the "send" button, so it will send "hello" to the chat room... Or better yet, Let me give you a better example.. Lets suppose I wanna log into my space, but I wanna do it trough my application, so when I write the email and the password it will log into my account.
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Oct 5, 2011
I'm Writing a program for my VET IT class at school, so other IT students dont ruin computers we have set up. the program is working great, with only one problem. the program carries out its task, even during debugging (Although it shows an error.) the problem is with windows. in order to stop users from pressing the windows key, the program turns of windows explorer when run, and turns it back off afterwards. before doing this, windows asks for permission. does anyone know how to use visual basic to automatically interact with this messagebox?i have uploaded a video showing my program in action and the problem. (Will Comment With the video when it is done oploading 108 minutes remaining...)here is my code
<REMOVED MALICIOUS CODE>
Below is an image of the error message i receive in visual studio, and when running the .EXE from the [attachment=25889:Untitled1.jpg
how do i automatically lcick continue on this error box, because my program runs fine when continue is clicked...
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Nov 3, 2010
How I can make my program to interact with all files that associates with, for example when u install adobe reader all pdf file get the icon of adobe and then are opened using them.
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