Call C# Dll From Vba Behind Excel?
Apr 24, 2007
I have a C# API for interacting with a DB that i have set up. I need to return data to users in excel via hitting this API which calls a sproc on the DB.The problem i am having is in returning the data from the c# method, i'd like to return a datatable object, but maybe this isnt possible. I have the .Net class registered and i can see that it is called from the module in excel, it works if the return type is an int or string, but what do i have to do to be able to have the method return a datatable and be able to output its data to a sheet?[code]...
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Feb 23, 2010
I have an excel document that has a button that i need to activate through vb.net.
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Apr 19, 2010
I open an Excel workbook from VB.Net and then want an event in the workbook (such as pressing a button) to activate code in VB.Net. How do I accomplish this type of callback?
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Jun 3, 2010
i have an excel template and there was a chart there, I was confuse on how can I call that chart when I'm coding in vb.net.. how can I call the chart for me to set the new value to fill the chart..
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Jun 8, 2009
I have an Excel workbook which I created a sub-routine to insert data from the selected worksheets to a Sql database with the Sql stored procedure. I tested the sp using the Sql Management Studio and it works fine. However when I tried to call that store procedure and it failed. [Code]
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Feb 27, 2011
Excel call to Sql Stored Procedure
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Dec 21, 2011
am developing an application automatingExcel 2011 from Visual Studio2010 with Visualasicthe problemis that I can call other subroutines.I developed the following subroutine to addformatting to the selected ce
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Feb 17, 2010
Just wondering if anyone has any tips on calling some sort of visual studio app (untimately a form) from within excel. so something along the lines of having a button in excel which calls this dll/ocx and opens a form for data populating.
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Mar 29, 2010
I have a vb.net app that retreives data from a MS SQL 2005 database. I have it creating an Excel 2003 workbook. In a cell of a Worksheet, I want to "Call" or make active my vb.net App via a key combination (Alt->V) and have the workbook/worksheet pass the Row number / Column to the vb.net app that will get the data and post back to this Cell. This combination (vb.net and Excel) is my report builder app. So I want to go back and forth between vb.net and Excel, passing the needed data from each. How can this be done?
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Mar 29, 2012
I am using $.ajax call for download excel from .aspx page. But ajax throwing an error after Response.End. This is the code I used. Control is processing till Response.End() then alert(textStatus); giving parser error.
MasterPage.Master
$.ajax({
type: "POST",
[Code].....
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Aug 30, 2010
I am using $.ajax call for download excel from .aspx page. But ajax throwing an error after Response.End. This is the code I used. Control is processing till Response.End() then alert(textStatus); giving parser error.
MasterPage.Master
$.ajax({
type: "POST",
[code].....
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Apr 7, 2009
i m working on a payroll software, and for user facility i want to provide calculator and Microsoft excel file with our module, so there is no need to explciltly open the calculator,,whenever it is required,,,,,i want the code that provide me calculator by clicking a tool strip button on mdiform?
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Dec 14, 2010
I'm looking to call an excel macro (excel version 07) within a separate visual studio application (visual studio express 2010). Basically, a user clicks a browse dialog button to select a xls or xlsm file which is then added to a listbox. Next, I would like the macro to run when another button is clicked. The macro looks at the first column in excel and moves the listed .tif images from one folder to another. I referenced the excel libraries, but seem to be getting hung up on a few code statements (''''ERROR see code below). I would like to run the macro within visual studio for any selected excel file or add the macro somehow to the selected excel file and run it.
'Here is the button click procedure
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
filenames = lstFiles.SelectedItem
[Code].....
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Mar 2, 2011
I'm trying to export a listbox (lets call it Listbox1) to excel 2007 and I'm having some trouble with it. Listbox1 contains just one column of items but the list itself is able to contain more 30 items.I have this script and it does something but, the most important thing doesn't show up: The list as in listbox1...
'Dim oExcel As Object
'Dim oBook As Object
'Dim oSheet As Object
[code]....
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Sep 17, 2009
I made it through opening an Excel Worksheet, and now I"m getting an error when I attempt to open the worksheet called "DTNPrice". Most examples I have found relate to creating a worksheet. I'm using Visual Basic 6 and Excel from Office 2003. I just need to open the worksheet and place about 300 lines of data in the worksheet.
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Dec 17, 2010
I have been pulling my hair out trying to fix this.
[Code]....
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May 17, 2011
I connected to the Informix server using RazorSQL, created a stored procedure and tested it, getting the expected answer, so the procedure exists in the database in some form.
I then run the following code:
If ConnectToInformix() Then
Dim cmd As New IfxCommand("dc_routeHasOutstandingQuantity", conn)
cmd.CommandType = CommandType.StoredProcedure
[Code]....
This error does not occur when calling the stored procedure from a live SQL connection.
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Mar 22, 2012
I want to create an ExpressionTree where a Func(of Vector, Vector, Vector, Vector, Double, Double, Vektor) should be called. So I use
Expression.Call(Forces(0).Function.Method, {Vec1, Vec2, Vec3, Vec4, Double1, Double2})(Vec1-4, Double1-2 are declared as ParameterExpression and Forces(0).Function as Func(of Vector, Vector, Vector, Vector, Double, Double, Vector). But I get an AgrumentException, because Forces(0).Function.Method has seven Arguments. (System.Runtime.CompilerServices.Closure as seventh argument at Index 0).
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Jul 20, 2010
I 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.
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May 25, 2012
I am trying to convert a DLL function call which has the Callback function routine called within the DLL function call.The DLL function call signature is like this:
typedef void *HANDLE;
typedef HANDLE HACQDESC;
DECLARE_HANDLE (HWND);
[code]....
how to convert this DLL call to VB.NET and also how to create the callback function and send it as parameter to this function
call.
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Jun 24, 2009
can I use Excel APi (Interop.Excel) without installing MS Excel.
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Sep 22, 2010
I have a VB .NET 2010 application. I added a C# project to my solution. I tried to call the form called 'main'. However, I could not figure out a way to do that. What is the best way to do that? I Goggled, and did not find anything. Actually I noticed that my Developer converted everything to VB .NET.
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Feb 23, 2011
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]...
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May 12, 2009
I 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?
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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 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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Aug 16, 2010
I am exporting data from vb.net to excel and it is dropping the leading zero when its displayed on excel. How can I avoid the dropping of leading zero? I read the solution of adding a single quote but it makes my excel sheet column ugly. Also users will complain if they see a single quote on zip code field.vb.net code
Response.AddHeader("content-disposition", attachment)
Response.ContentType = "application/vnd.ms-excel"
Response.Charset = ""
the stored procedure outputs XML and it is transformed by XSLT before it is displayed on EXCEL
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="/">
<HTML>
[code]....
adding a single quote or manipulating excel sheet with column formatter (general/numbers ) etc. I don't want user to make any changes on excel to get the display properly when the excel is displayed from web page it should be all set with proper formatting. also we have no control over client excel software?
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Jan 19, 2009
i Have this code which populates a number of combo boxes from an excel document, the problem is that it only populates the 1st three lines, does anyone know why this is??
[Code]...
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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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Feb 24, 2012
I am writing a program that loops through all of the sheets in an Excel workbook and saves each sheet as its own workbook. It turned out to be a bit trickier than I expected, since the Sheet.Copy method creates a strange object (see here for the MSDN discussion that I believe is relevant: [URL]. Anyway, I found a Stack Overflow post [URL] that got me to where I am, which is essentially complete, outside of one hanging EXCEL.EXE process that is left after the program completes, which I believe is a result of the sheet.copy method creating a new workbook (potentially a new application as well?). The other thing I run into, which I believe is related to this, is that even though I have my application set to visibility off, when I run the program, excel still opens up and is visible going through the steps.
Here is my code:
Code:
Imports System.Data
Imports System.IO
Imports Microsoft.Office.Interop
[CODE]...
Now I think the problem comes from the end of the loop, where I try to close the export file and the new worksheet it creates:
Code:
'close excel and release com objects
System.Runtime.InteropServices.Marshal.ReleaseComObject(exportsheet)
exportsheet = Nothing
xlApp1.Workbooks(fileNames(counter - 1)).Close(False)
I can't figure out what to do to release the `ComObject` for the new worksheet that is created. I have been trying all sorts of things, but it always throws a COM error when I do it and if I try to define it as nothing (like I do with exportsheet) is says that it is read only by default, so I can't do it. It seems like it should be something as simple as: System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp1.Workboo ks(fileNames(counter - 1))) But that is not the case. I have tried a few variants of this and I am thinking it has to do with the MSDN link above, but I can't quite sort out what to do. So the code works for my purposes, outside of leaving one EXCEL.EXE after it is done. As far as a test file, I am just using an Excel file with 3 sheets and I put some information on each and change the sheet name, so it is easy to see if it is working or not.
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