I am creating an excel file in my vb app. Below is the code I am using to do this. But when the application is closed, I still have an instance of Excel running in the background. How do i close it? I can do it with the xlWBook but not the xlApp.
'create empty excel file
xlApp = CType(CreateObject("Excel.Application"), Microsoft.Office.Interop.Excel.Application)
[Code].....
I'm writing VB code in Visual Basic 2008 Express and can't seem to figure out how to create a new instance of Excel with VB code. The most common answer appears to be setting an object variable to 'Excel.Application', but that gives an error (Type 'Excel.Application' is not defined).
View 1 RepliesI 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.
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 am writing something to a excel file.So far so good. The only thing is the excel file is pop up.My question is how to make it invisible.I can open it directly from the hard drive when I want.
Public Sub WriteSpreadsheetFromArray(ByRef strOutputArray(,) As String, Optional ByVal strExcelFileOutPath As String = "")
Dim objxlOutApp As Excel.Application
Dim objxlOutWBook As Excel.Workbook[code]....
I want catch excel file close event
Like this :
if Xapp.exit = true then...
I did ana application that interacts with excel (reading and writing files)But when the application ends and I close it, the excel file is still in the task manager procceses (ctrl+alt+del ->Proccesses)How can I completely close it?I'm using vb.net 2010 express
View 2 RepliesI need to access the current instance of MS Excel. To do that, I wrote the following code:
Imports Excel = Microsoft.Office.Interop.Excel
Imports System.Diagnostics
Private _ExcelApp As Excel.Application
[Code].....
The code runs nice, but it has a problem: After the user close the Excel application (click button X - note: no other instance of Excel exists), if you open the Windows's task manager, its possible to see the process Excel.exe.
If I open and close the Excel application, there is no process Excel.exe, but if I run my code with the Excel application openned, after the user close the Excel application, the process Excel.exe isn't finished.
I have this peace of code, where I want to make an excel file:
Dim filename As String = ""
Dim sheetname As String = ""
Dim xlApp As Excel.Application
[Code]....
The problem is that this only works if the file and sheet already exists. How do I create a new Excel file?
I'm currently in the process of building a text editor type program, and have run into a brick wall. I haven't done VB in years, so I may just need a little reminder on some things. I have coded everything so far as far as opening files, saving them, changing fonts, colors, etc. However, I'm looking to add a Close button to my menu strip that will just close the currently opened file, and not the entire program, while also ask the user if he/she would like to save before closing the file, and then if they select yes, it will show the save dialog, and if not, it will go ahead and close the currently opened item.
View 2 Repliescreating single instance form in MDI Application. How to check whether form's instance created or not?
View 6 RepliesI am trying to use the BGW to save a DGV to excel file, but don't know how to do it correctly, specifically setting the savefile name this code doesn't work gives me:
'System.Runtime.InteropServices.COMException' occurred
- Make sure the specified folder exists.
- Make sure the folder that contains the file is not read-only.
- Make sure the file name does not contain any of the following characters:
Ensure that your Main function has STAThreadAttribute marked on it. This exception is only raised if a debugger is attached to the process. I also tried doing the Save in the BGW RunWorker Completed event but then there is no file name. It seems I need to pass the file name the user inputs in the SaveFileDialog to the BWG WorkerCompleted event somehow
Private Sub excelexp_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles excelexp.Click
ProgressBar2.Visible = True
Saving.Visible = True
Dim saveFileDialog1 As New SaveFileDialog()
[Code] .....
I have a vb.net app that I create an excel file with from sql data. It creates it fine but for cells that have a social security number, it makes that cell numeric and removes the leading zeros. Does anyone know how to force this cell as a string when adding it to the worksheet? Is there a property or method I can call to do this in my vb app?
View 1 RepliesI need my app to create a excel file, but I am getting a error running this code. While running this in debug, on the line "xlWorkSheet.SaveAs("C:vbexcel.xlsx")" there is a error saying "ComException was unhandled" and "Exception from Hresult 0x800A03EC"
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
[code]....
I want to encapsulate the use of Excel Interop to make it easier to use somehow in a reuseable library.So far, I have written some tests that work good altogether, except that between each test, I force Excel to quite so that it does have handle on the test file no more in order to be able to delete.Once I quit the application instance between after each of my tests, Excel seems to be no longer responding, causing Windows to display "Excel has stopped working and is looking for a solution"
message. This message lasts a few seconds, meanwhile Excel is closing, causing the hang on the file to occur and my tests to throw an exception like "Cannot access file because it is being used by another process..."
[Code]...
[Edit] See this post as to why I'm declaring form elements globally. I chose to rewire my code to get rid of the global definitions. [End Edit] I'm creating a from dynamically at runtime. the form, all buttons, and the combobox are all declared globally to the parent form. dim myForm as new form
[Code]...
Suppose a click event is fired and a particular gridview datasource is set in the code behind page by retrieving a data table from a business logic class.
So programmatically speaking, what is the main difference between the two set of code listed below.
Private Sub btnGetGridViewData_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim myBLL as New BusinessLogicClass
[code]....
I guess my main question is, what is the purpose of creating a new instance of an object in the above scenario?
I have a form with a button. I want the button to show a new instance of the same form but I don't know what to do. I'm working in vb.net 2010
View 3 RepliesI am converting C# to VB right now
in VB, I have these codes :
Dim ind As Foo.Index
Dim ed As Foo.Edit
ind = New Foo.Index
[Code]....
Seems I do need to show all the codes. But I need to talk directly to you as well (or You just install the software of mine).
My project is done on vb,net& sql2000 but it is not running and showing error -
" object is not creating an instance " what to do ?
my aim is to create a new instance box at the push of a button, the box has strings name and Id to be filled concatenating the auto generated ID i.e. 0 to 210 plus a string "Box" added by the user. I had problems earlier creating a structure within the class box, frankly I am not sure if the code below will work, as i try to run it in VB I get an error indicating that I am using the variables strBoxPositions() and strBoxNumbers() without assigning a value to it. The thing is the strBoxPositions() should automatically be filled by arrPosition() which will be created at the same time the new object box is created and the strNumbers() will be created with empty strings to be filled at latter stage by the used as and when necessary.
how could I initialise those arrays to get the program to run and perhaps ill be able to see if the code works or not, or just correct this code with a better way of code with comments, also if possible some indication on how could I update the strNumbers array inputing the strings one at a time on a text box field.
Public class form1
Public Class Box
Public intBoxID As Integer
[Code].....
I am getting an error when I run this app in VS 2010 (it works fine in VS 2008)
[Code]...
I would like to create a global instance of a User Class that can be referenced by all the forms in my MDI application.This object may be set during the login procedure by the Login form but the user attributes are to be available for other forms. For example, MyUser.ID will be required for meeting the audit requirements whenever data is changed.
View 14 RepliesVS Express 2010 gives me a "Creating an instance of the COM component with CLSID {D70E31AD-2614-49F2-B0FC-ACA781D81F3E} from the IClassFactory failed due to the following error: 8007000e."
Error at this line
Dim acadDoc As New Autodesk.AutoCAD.Interop.AcadDocument
Here is the method call:
Private Sub Process_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Process.Click
Me.DialogResult = System.Windows.Forms.DialogResult.OK
[Code].....
I have created a multiuser application and at different user login i want to create different instances of the application.How to do this? Can somebody give the concept of how to approach this?
View 14 RepliesNow I have created this order form but when I click on the ADD button nothing happens. I expect when I click on the item automatically the data is added to my database. i am using SQL Server 2005
View 1 RepliesNow I have created this order form but when I click on the ADD button nothing happens. I expect when I click on the item automatically the data is added to my database. i am using SQL Server 2005
View 5 RepliesIn my VB .Net code, I am trying to create to launch MS Project Application. Dim prjApp As Microsoft.Office.Interop.MSProject.Application = New Microsoft.Office.Interop.MSProject.Application
But I am getting the exception as follows:
"Creating an instance of the COM component with CSSID {36D27C48-A1E8-11D3-BA55-00C04F72F325} from the
IClassFactory failed due to the following error: 80010001".Note: This exception happens in 64 bit Windows 7 German OS. But the same code runs successfully in 32 bit Win XP (German and English) and 64 bit Windows 7 English OS.I have even tried the following steps in German 64 bit Win 7
1. Running the application in Administrator mode
2. Setting UAC to low.
3. Re-installing MS Project in German 64 bit Win 7.
I am using msn api to read contacts out of msn
Interop.messengerapi.dll
When I run the app on my machine everything works perfect. But when I run it on another machine, the following error appears:
Creating an instance of the COM component with CLSID {B69003B3-C55E-4B48-836C-BC5946FC3B28} from the IClassFactory failed due to the following error: 8007000e.I have merged the interop messenger dll properly with imerge, so that cant be the problem.
Also a memory problem must be out of the question. I only use 300mb from the 4GB. There is also enough disk space available.
My Code:
Private Sub getMSNContacts()
Dim objMSN As New MessengerAPI.Messenger
Dim msncontact As MessengerAPI.IMessengerContact
Dim msncontacts As MessengerAPI.IMessengerContacts = objMSN.MyContacts
For Each msncontact In msncontacts
ListBox1.Items.Add(msncontact.SigninName)
Next
MsgBox("getMSNContacts")
End Sub
In VB.net we are creating different namespace level classes. For Example,DynamicPDF - Root NameSpaceTest ,Report are two sub folders in side the sub folders some classes.
1) DynamicPDF.Test.ClassA
2) DynamicPDF.Test.Report.ClassB
using the VB.NET i was generated the Tlb file.
[code]....