.net - Put Interop Dll Into GAC?
Apr 7, 2011
This might be a bit of stupid question but I need some clarification. I'm somewhat new to .NET and have created a EXE that had to reference an existing COM DLL. In doing so, Visual Studio 2010 automatically created an "Interop" DLL that it needs/uses to work with the legacy COM DLL.
I have deployed my project and included this Interop DLL with it (in the same folder) and everything is working fine. However, I have other applications that will need to use this same legacy COM DLL. Is it okay to reference it they same way in each application and keep deploying the "Interop" DLL with each application? Unfortuantely, all of these small applications go in the same folder and each use the same Interop DLL (so it will already exist there if it's used by another app.) I'm forced to having them in the same folder because these applications are being called as a way of customizing a parent application. As such it only looks in it's local folder when it wants to run a "custom" app. I'm just concerned if one the EXE's is ever removed and they take out the Interop DLL, then the others that still depend on it will fail.
So, I was wondering if it is possible or a good idea to put that Interop DLL in the GAC? I went ahead and installed the Interop DLL into the GAC and then removed the Interop DLL from the folder where my EXE runs and it failed to work. I get an error that says "Could not load file or assembly". I'm stuck on getting this working.
Do I need to reference the Interop DLL in my project differently such that it's now from the GAC? or Do I need to add something to my .NET code like Assembly.Load to make it work? Do I need to create that Interop DLL myself using TLBIMP?
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Aug 29, 2011
i want to write a small app which enables the user to burn some files on cd/dvd. Something like:
- Make an export from related DB Tables with informations
- Collect customers informations
- zip everything
-burn on cd (its a settlement related tool)
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Apr 11, 2009
What is COM Interop? Please remember to mark the replies as answers if they help and unmark them if they provide no help.Welcome to the All-In-One Code Framework!
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Jun 29, 2012
I am using Interop to read and write to excel but I'm having some problems writing to excel... When I enter the information I need to be written on the excel in an inputbox, this pops up "COM object that has been separated from its underlying RCW cannot be used."Heres the Code:
Code:
Private Sub editmodelbtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles editmodelbtn.Click
[code].....
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Jul 13, 2011
I am trying to use a 3rd-party Interop assembly called SmartWIM.
I have added it as a reference and added an Import statement
Imports SmartWIMLib
I then initilalise it with
Dim objSmartWim As New SmartWIM
All pretty standard stuff, I've done this countless times with Interops. However, whenever I try and use any methods I get the following error [code]...
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Sep 15, 2011
I'm kinda new to using VB.NET and certainly with the Excel Interop.I have the impression that I'm doing something wrong in these simple procedures. I keep getting errors on them:
[Code]...
The first procedure fills a combobox with all the worksheet names of the workbook.The second procedure copies all cells in the selected worksheet to an array.The error is the following: System.NullReferenceException: Object reference not set to an instance of an object.I think the error is in the cleanup part, when I set the objects to nothing and close everything. Can someone confirm if this is good or wrong code and maybe point me in the right direction?
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Aug 26, 2011
I Programe a COM Library in VS2008 to use in Excel , but I'm stuck with an error that I don't understand.
I use this two classes , that compile and register OK. One Class QBitems return a nongeneric collection of QBItem but when I tried to use the Add and/or Remove Method, I receive the following error in Excel VBA :
Run-time Error '438': Object doesn't support this property or method.
I added a class (SImpleClass) in the library and I called from VBA it returned the QItems collection without problem.
NEW: When I replace the QBItem object with a string in the Collection QBItems everytthing works OK. It looks like interface doesn't like to pass an object like QBitem class
Excel/VBA:
Sub Pru()
Dim obj As New CollectionCOMClass.SimpleClass
Dim Itms As New CollectionCOMClass.QBItems
[Code]....
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Apr 15, 2009
I have a .NET application that interops with a VB6 COM DLL. After installing the application on a Vista machine, I try to execute the code that consumes that COM component and I get an error attempting to read or write protected memory. The system's DEP is set to only essential programs and services, but apparently that automatically applies to .NET applications. When I tried to exclude the application from DEP, it said that DEP must be on for this program (could not be turned off). I had to use the bcedit.exe program to manually turn DEP off system wide and then reboot. After that, the application ran without a hitch, but this is not the route we want to go for our users. Are there any solutions/recommendations for this? It seems as though DEP has been more of a headache than not.
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Mar 6, 2010
How can i add Interop.ADODB.dll to my references as i cant seem to find it when i try?
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Jun 22, 2010
I am creating a report in my asp.net application. The report outputs to excel using the excel interop. Some calculations in the report cause excel to display "Inf" or "NaN" I want to force these calculations to zero so that the report displays zero and NOT "Inf" or "NaN"
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Apr 5, 2012
The Current Setup:So, I can use the following code to save a file as an XLS:
_myWorkbook.SaveAs("FileName.xls", Excel.XlFileFormat.xlWorkbookNormal)
I can also use the following code to save a file as an XLSX (Since I use Office 2010):
_myWorkbook.SaveAs("FileName.xlsx", Excel.XlFileFormat.xlWorkbookDefault)
I have tried (unsuccessfully) to save the file as an XLSX using the following code:
_myWorkbook.SaveAs("FileName.xlsx", Excel.XlFileFormat.xlExcel12)Why does this not work? Last I checked, Excel 12 was Excel 2007 (a version that supports XLSX). Am I missing something?
I get a This extension can not be used with the selected file type error)
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Feb 6, 2006
I've developed a vb.net app which works great on my dev machine, both within the IDE and as a compiled executable. But when I deploy it to a user workstation, I receive the following:
Unhandled exception has occurred in your application. If you click Continue, the application will ignore this error and attempt to continue. If you click Quit, the application will close immediately.
Could not load file or assembly Microsoft Office Interop.Excel, Version=11.0.0.0,Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The system cannon find the file specified.
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Jan 8, 2012
Im doing a VB .net2 program and when building i get file interop.shell32.dll in my bin folder.
Can i embed that in my final .exe file so I only have to destribute 1 file ?
There is a properties on my form where I can choose a "Build Action: Embedded Resources" , is that the option to accomplish me goal?
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Jun 28, 2011
I am trying to Import an XML file into Excel and then Export the data to CSV. I did the Import Data steps manually in Excel while recording a Macro. I am basically using those commands in VB.NET.
Try
xlWBook.XmlImport(filename,, True, xlRange.Cells(1, 1))
xlWBook.SaveAs(outFile, xlCSV, False)
[code].....
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Oct 27, 2011
i want to know how interop.speechlib.dll works and reads the English text because i want to Develop a Project that reads other languages.
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May 30, 2011
I have Office 2007 installed on my Win7 development machine, however I want my Office-reliant VB.Net app to reference/work with, Office 2003 and above. I tried installing the Office 2003 interops redistributable but the installation tells me that I need
to have Office 2003 installed. Is there a way I can install the Office 2003 interops so that my app can have references to Office 2003 and thus work on Office 2003, 2007 & 2010?
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Mar 29, 2009
I created a class named person and interface IPerson and tried to call this class in VB6 form. the class structure is given below
[Code]...
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Oct 2, 2009
Now i'm using visual studio 2010 beta1 and Interop.MSHierarchicalFlexGridLib.dll file is installed my computer but there was an error occured on start up of my project. so what would i do? screen shot of this error is:
1.Hide Call Stack
at AxMSHierarchicalFlexGridLib.AxMSHFlexGrid.AttachInterfaces() at System.Windows.Forms.AxHost.GetOcxCreate() at System.Windows.Forms.AxHost.set_Site(ISite value) at System.ComponentModel.Container.Add(IComponent component, String name) at System.ComponentModel.Design.DesignerHost.Add(IComponent component, String name) at
[code]....
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Apr 4, 2012
I'm using the InteropFormsToolkit version 2.1. I'm trying to make sure that when a .NET form loads from an event being thrown on the VB6 form, that the .NET form can stay on top. I've tried many things and can't get anything to work. I've tried everything from z-index, to adding a managed call into User32.dll to push it to the forefront, etc.
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Dec 2, 2011
I have difficulty locating the MS.Office.Interop.Word and .Excel DLL's in the .Net / COM Components. I successfully located and referenced the Interop.Excel component in the past few months but suddenly they are missing. What has happened or have I done wrong?
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Jul 15, 2011
I cannot get a handle for managed code to work for unmanaged code. I am successfully getting a a process handle on the managed side and sending it to unmanaged multithread code which is comming back with a zero which is supposed to be the old mask if the call was successful which means it wasn't. Im beginning to wonder if the structures are different. I also think that they are different list lists so of course it will fail.[code]...
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Dec 2, 2009
I'm working on some interpo between VB6 and VB.NET and I've hit (another?) brick wall.I need to pass an array of "stuff" between VB6 and VB.NET. This contains an ADO recordset and 4 string values. There could be any number of these 5 items passed, so they will have to be an array of whatever.Seemed to me that in VB I should create a Type and in .NET a Struct, then it should be easy. However...
On running the VB app it fails to start with an error "Function or interface marked as restricted, or the function uses automation type not supported in Visual Basic"
[Code]...
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Aug 13, 2009
I'll like to know something about the option "Register for COM interop" into the project Compile screen from a project.
Is this check box do the same job as RegAsm.exe?
I'm asking this because since I've enabled this option the compilation of my project take 30-45 seconds instead for 2-3 seconds. And I've really need the .tlb file.
If the RegAsm program do the same job, then I will only rebuild my .tlb when needed instead of every compile.
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Jul 27, 2011
Is it possible to register a vb.net Service for com-interop?
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Jan 13, 2009
I have folowing code for adding attachment to outlook e-mail:[code]This property doesn't exist. The field u wan't to change is not correct for this type of object.
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Oct 11, 2011
I am trying to develop a .NET class that updates a VB6 Form and its controls with various new captions (It is in an assembly that is COM visible).
I pass a VB6 form ByRef as an object to the .NET class and then update the caption etc on the form as follows:
Public Sub AddFormRefLegacy(ByRef objForm As Object)
Try
objForm.Caption = "some new caption"
[Code].....
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Feb 28, 2012
I am creating a wrapper class in .NET (VB.NET as it happens but is equally related to C#) that is exposed to COM and one of the properties I am trying to wrap is a Variant. I thought I would just be able to use an Object, but I get an error: Public Property FieldValue([vFieldID As Object = -1]) As Object cannot be exposed to COM as a property 'Let'. You will not be able to assign non-object values (such as numbers or strings) to this property from Visual Basic 6.0 using a 'Let' statement.*
My property declaration looks like this:
Public Property FieldValue(Optional ByVal vFieldID As Object = -1) As Object
Get
[code].....
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Jun 21, 2012
OK, this is a shot in the dark as I'm at my wits end. I have two third-party DLLs that work great in VB6, but not so much in VB.NET or C#. In VB6, the below works just fine:
[Code]...
As stated earlier, the two DLLs (OAPPLICA.dll and OSESSION.dll) are third-party and allow an entry point into a third-party legacy system. Since it's legacy I don't have access to the third-party anymore, I've just been tasked with trying to prototype converting an existing Windows VB6 application into an .NET web application. My hunch is .NET is having an issue interpreting the interop DLL for the two COM objects, but I have been unable to find anything to point me in a direction.
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Mar 18, 2012
I'm writing a small iframe-hosted XBAP that needs to inteact with the host page.I've first wrote a small POC to see that all I need is possible.Here's the code of the page constructor:
Public Sub New()
' This call is required by the designer.
InitializeComponent()
Try
[code]....
This happens in IE 64-bit, with IE 32-bit the whole XBAP fails to load (even before the alert line).
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Apr 7, 2009
In C# I'm calling a function on an interop class (Connection, written in VB6), which itself returns a plain object (System). Then there's a function on that object (InitialiseData) that I also call (even though the compiler isn't aware of it). var isInitialised = Connection.System.InitialiseData(path); The problem is, because that System object is returning a mere Object, I get the compile error "cannot resolve symbol". I can see why, but the same thing works fine in VB.NET:
[Code]...
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