Error Using An Object Array With .NET COM Interop DLL
Mar 28, 2011
I've found a lot of other references to this error using Google but I'm having trouble making sense out of how they apply to what I'm doing.
Here's the VBA error I'm getting at compile time: "Function or interface marked as restricted, or the function uses an Automation type not supported in Visual Basic."
VBA Code that causes the error:
'ftp is also a com object created in code not posted here
Dim f() As wooxter.FTPFile
f = ftp.GetFileList 'Returns an object array of type FTPFile
[Code].....
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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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Jun 1, 2011
Trying to replace Cells(RowIndex,ColumnIndex).Value() calls by row-wise references for performance, I permanently fail at referencing the result. Starting with Excel Interop - Efficiency and performance, which contains the tip to use get_range, i.e.
//get values
object[,] objectArray = shtName.get_Range("A1:Z100").Value2;
iFace = Convert.ToInt32(objectArray[1,1]);
//set values
object[,] objectArray = new object[3,1] {{"A"}{"B"}{"C"}};
rngName.Value2 = objectArray;
[Code]...
However, referencing Values with two dimension indices always returns an "index was outside the bounds of the array" exception. Inspecting the array with the debugger shows a nice 2-dimensional array which should has 17 elements on the second dimension, so Value (0,0) should indeed be a valid reference -- but it isn't:
The debugger lets me inspect Value, I can also drill down to Value(0,0) and see the correct value, but re-evaluating just that element, i.e. inspecting "Value (0,0)" returns above message.
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May 10, 2009
I have been trying to use vb2008 to automatically update CustomDocumentProperties fields that I have set up within a pro-forma document. I can load the Word application and word document without problems.I want to update the CustomDocumentProperties fields with data read from a dB. To do this I am assuming that I need to iterate through the CustomDocumentProperties fields within the word document and when one is "found" that matches the data I wish to merge then assign the dB value to the field.The problem is that I am getting an exception error when I try to reference the document customdocumentproperties
"Error : Unable to cast the COM object of type 'System._ComObject' to interface type 'Microsoft.Office.Interop.Word.CustomProperties'. ...... "
my code looks like;
Dim WordApp As Word._Application
Dim odoc As Word._Document
Dim BContinue As Boolean = True
[code].....
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Mar 30, 2012
I have been assigned to Convert a VB.NET project to C# and I got stuck. I am using a class called RsiOPCAuto, but I don't think that I'll have to go into to much detail into explaining how it works. Let's just get on with my issue.
So basicly what i do is grabbing an object from my class using this code:
public partial class FrmPartialMain : Form
{
RsiOPCAuto.OPCServer oOpcServer;
[Code].....
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Jan 11, 2011
This is my code in vb.net 2010:
Structure feature_s
Public feature() As Integer
End Structure
[CODE]............
I keep on getting a error "object not set to an instance of an object" i am puzzled by this since there are no errors until i run the program. I redim the array. the build is fine. the exception is handled. and the structures and "dims are all global"
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May 25, 2009
I have a VB6 program which calls a COM method, passing 2 arrays as parameters and expecting 2 arrays to be populated in response.The code is this, where ItemIDs and ItemClientHandles are the input array parameters and MyItemServerHandles and Errors are populated by the COM object.
Dim ItemIDs(2) As String
Dim ItemClientHandles(2) As Long
Dim Errors() As Long ' Array for returned Item related errors
Dim MyItemServerHandles() As Long ' Server Handles for Items
[Code]...
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Jul 12, 2010
I have a managed class that uses a COM that looks like this.
[Code]....
Since I am using an unmanaged dll through a COM-Interob dll I am wondering if I need free the innerobj manually or if the gc is smart enough to do it automagically if I call ReleaseObject() My class implements IDisposable and I do the following atm: Runtime.InteropServices.Marshal.ReleaseComObject(myobj) Do I need to take care of releasing all inner objects that are created by the COM Object or not? And If I do have to do it, does the order matter (first inner then parent vs parent then inner)?
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Jan 1, 2008
I have set my datasource on my datagridview to be a subset of rows as follows:
dg.DataSource = myDataSet.testTable.Select("id=" & id)
But I get a runtime error that Operator '=' is not defined for types 'Object' and '1-dimensional array of DataRow' There should be an easy way to do this that doesn't involve creating new tables, etc.
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May 12, 2010
I need to provide a DLL that is consumed by a VBA app (Access 2003, late binding) and returns stuff that is retrieved from various WebServices. These WebServices publish methods that not only return a single object, but also arrays of them.
From the Access-app's point of view, it's no problem to consume i.e. an array of strings. However, there's also methods that return an array of a (proprietary) class. I can't seem to be able to consume such an array from VBA.[code]....
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Apr 30, 2009
WTF, here's my code...
Public Class Form1
Dim BIT01 As Integer = BIT_01.Text
Dim Value As Integer = TB_OutPut.Text
[code].....
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May 10, 2011
I have an application that creates desktop shortcuts. To do this I have to reference the Windows Script Host Object Model. When I add it as a reference, it always creates the DLL, Interop.IWshRuntimeLibrary.dll, in the objx86Debug directory, then references itself to it, rather than looking at wshom.ocx. Even if I add reference wshom.ocx it reverts to saving the file in the objx86Debug directory. The problem is if I move my application to another computer without that DLL being present, the program fails to run.
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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 30, 2008
I get an error "type access.application is not defined".I have Imports icrosoft.Office.Interop.Accessand I have Microsoft Access 11.0 Object Library installed as a Com Reference.Other References I have installed are:Microsoft ActiveX Data Objects 2.7 LibraryMicrosoft Office 11.0 Object LibraryMicrosfot Visual Basic for Applications xtensibility 5.3I'm running VS2008The code is: ImportsMicrosoft.Office.Interop
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Aug 29, 2011
I am trying to select a list of sworksheets to save as a PDF. The recoreded Macro gave me the code below, but after modifying it for VB.Net, the word array is flagged saying it is a type and cannot be used as an expression. Is there Excel object or namespace I can use? I can't find anything in the help searches. It says to use Sheets(array to get more than 1 sheet.
[Code]...
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Sep 11, 2009
I get this exception message when I run my web site in my development pc. I've found many links that say that what I have to do is to register the dll, modify the COM properties and other when I pass my project to the server.Now, the curious thing: in the same computer I created a user control that create an excel document and It works fine, but, I took the control and I put it inside the other Web Site project with all the same references and it throws me this exception. I did not change
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Feb 23, 2009
I am trying to have my .NET application interop with an object created in VB6. The VB6 application has a ShowDialog method with the following signature:
Public Sub ShowDialog (Optional fParent)
And inside the code, there is the following lines of
If Not IsMissing(fParent) Then
[code]......
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Feb 24, 2012
I am using a background worker and am attempting to use the following code. However I keep getting this error on i "Unable to cast object of type 'ObjectCollection' to type 'System.Array'."
Private Sub btnVerify_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnVerify.Click
myArray = listProxies.Items()
BackgroundWorker1.RunWorkerAsync()
End Sub
[code]....
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Jan 14, 2011
it works on 32bit and framework 4 - error: could not load file or assembly Interop.XXXX.dll Steps to reproduce:Create a new VB.Net winform project on a 64 bit system with framework 4 drop windows media player control on form. builds and runs fine. project references has two interops to temporary directory under obj folder copy if necessary the two interops to the build output path and delete the old project references and add new ones pointing to the interops in the output path build and run, everything is fine.ste the target frameowrk to 3.5 and repeat the whole process. the build fails.This is just a simple example of what I am seeing on a much mor complex project. It happens with all interops, not just WMP.
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Dec 23, 2011
i have created a application that uses office outlook. my development machine has office 2010. now when i try to install the application on a computer that has office 2007 i am getting an error that says i should install office.interop.outlook version 14.0.0.0 in the global assemblies cache.
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Dec 9, 2010
I have written a program in which I have import
Imports
Now when I write
Application.Exit()
It show error
Exit is not a member of Microsoft.Office.Interop.Outlook
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Jun 24, 2009
I am writing long text (1K to 2K characters long, plain xml data) into a cell in excel workbook.
The below statement throws COM error Exception from HRESULT: 0x800A03EC
range.set_Value(Type.Missing, data);If I copy paste the same xml manually into excel it just works fine ,but the same does not work progamatically.If I strip the text to something like 100/300 chars it works fine.
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Apr 26, 2010
My Problem: I am using Matlab COM Automation Server to call and execute matlab .m files from a VB.Net plugin for a CAD program called Rhino 3D. The code works flawlessly when set up as a simple Windows Application in Visual Studio, but when I insert it (and make the requisite reference) into my .Net plugin and test it in the CAD program I get the following error: "Could not load file or assembly 'Interop.MLApp, Version 1.0.0.0, culture=neutral, PublicKeyToken=null' or one of its dependencies. the system cannot find the file specified."
What I've Tried: I am baffled as to why this occurs, but I was able to contact the CAD program's technical support staff and they suggested that it has something to do with their DotNet SDK having trouble with references that are located far outside the CAD program directory. They didn't have any solutions so I tried playing around with copylocal and this made no difference. I tried using other COM libraries and the Open Office automation server works fine, although uses url's instead of requiring a reference. I also tested Excel, which does require a reference, and it returned the error: "retrieving the COM class factory for component with CLSID {...} failed due to the following error: 80040154." This may or may not be related to the issue with the Matlab COM reference, but I thought was worthwhile to share. Perhaps is there another way to reference Interop.MLApp?
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Apr 22, 2010
I am working on an application which compiles fine on machine that is Win 7 and 64 bit CPU. But when copy and I run the exe file on similar machine (Win 7 64bit) I get error message: Error: Could not load file or assembly 'Interop.ActiveDs.Version=1.0.0.0,... I have added ActiveDS Type Library 1.0 C:WindowsSysWow64activedstlb as a reference in the project file.
[Code]...
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Aug 6, 2010
Here is the structure that I have:
Friend Class StandardFormatFile
Friend fileType As String
Friend numberOfSeries As Integer
[code].....
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Mar 29, 2010
Error2'KeyUp' is not an event of 'Microsoft.Office.Interop.Excel.TextBox'. how can i fix this error
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Jun 14, 2011
I didn't think it fair to post a comment on Fredrik Mörk's answer in this 2 year old post, so I thought I'd just ask it as a new question instead..NB: This is not a critiscm of the answer in any way, I'm simply trying to understand this all before delving into memory management / the marshal class.
In that answer, the function GetByteArray allocates memory to each object within the given array, within a loop.Would the GetByteArray function on the aforementioned post have benefited at all from allocating memory for the total size of the provided array:
Dim arrayBufferPtr = Marshal.AllocHGlobal(Marshal.SizeOf(<arrayElement>) * <array>.Count)
I just wonder if allocating the memory, as shown in the answer, causes any kind of fragmentation? Assuming there may be fragmentation, would there be much of an impact to be concerned with? Would allocating the memory in the way I've shown force you to call IntPtr.ToInt## to obtain pointer offsets from the overall allocation pointer, and therefore force you to check the underlying architecture to ensure the correct method is used*1 or is there a better way? (ToInt32/ToInt64 depending on x86/64?)
*1 I read elsewhere that calling the wrong IntPtr.ToInt## will cause overflow exceptions. What I mean by that statement is would I use:
Dim anOffsetPtr As New IntPtr(arrayBufferPtr.ToInt## + (loopIndex * <arrayElementSize>))
I've read through a few articles on the VB.Net Marshal class and memory allocation; listed below, but if you know fo any other good articles I'm all ears![URL]..
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Mar 4, 2012
I am creating a dll with all the functions and subroutines that I use all the time and I decided to create a function that I can pass different types of array to so the function obviously (or not) would have an array of type object. Now I no you can pass any type into an object type but when I pass an integer array into an object array I get an error.
value of type '1-dimensional array of integer' cannot be converted to '1-dimensional array of object' because 'integer' is not a reference type.
Shared Function CompareArray(ByVal FirstArray() As Object, ByVal SecondArray() As Object, Optional ByRef ErrorMessage As String = "") As Boolean
Dim IntArrayOne() As Integer = {1,2,3,4,5} Dim IntArrayTwo() As Integer = {1,2,3,5,6} Dim IsSame As Boolean = False IsSame = CompareArray(IntArrayOne(), IntArrayTwo())
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Mar 29, 2010
I am having some trouble creating an object array of different object types. Here is what I have so far:
Public Sub New()
Dim b1 As New Book("Book Title 1", "Gold Book Publisher", 1.0, "Bob Jones", "192DJDJD212", "01/02/10")
Dim b2 As New Book("Book Title 2", "Gold Book Publisher", 1.0, "Bob Jones", "192DJDJD212", "01/02/10")
Dim b3 As New Book("Book Title 3", "Gold Book Publisher", 1.0, "Bob Jones", "192DJDJD212", "01/02/10")
[code]....
If I define the array As Book (Public publicationArray(6) As Book) or Magazine (Public publicationArray(6) As Magazine) I am able to access the properties of that class but not both. I think I need to define a type for each array instance but not sure how to do this.
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Mar 4, 2009
I have an interface that describes an specialized list in my application...
[Code]....
Is there a way to make an interface serializable, or am I going to have to convert each of my objects into a concrete class implementing the interface, and then return that class?
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