Passing An Array Of Integer To An Array Of Object In A Function
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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May 27, 2010
I'm having problems with marshaling in VB.NET to C++, here's the code :
In the C++ DLL :
struct APP_PARAM
{
[code].....
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Nov 1, 2011
I previously posted a Question about code that uses a function to return the frequency of characters in an array. I have now got this code.
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Jun 23, 2011
I am trying to call the method with the following declaration[code]...
The structs should both be twodimensional arrays with indexes of 4,4 and 5,4 respectively. The second one is an out parameter.
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Jul 23, 2009
pass an array to a function, like the code below shows
Private Sub SomeFunction(ByVal PassedArray() As String)
For i As Integer = 0 To PassedArray.Count - 1
Debug.WriteLine(PassedArray(i))
[code]....
But is there a way to pass a constant array to a function in VB .Net, for instance in PHP you could write
function SomeFunction($array)
{
for($i=0;$i<count($array);$i++)
{
[code]....
So to reiterate: Is there any way to pass a constant array directly to a function in VB .Net? Is there any benefit in doing so? I imagine a few bytes of memory could be spared.
PS.SomeFunction({"some", "array", "member"}) ' this obviously gives a syntax error
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Apr 30, 2009
I am trying to use a simple quicksort routine for a multidimensional array but cannot figure out the syntax. I am stumped because it works fine in VB6 but no luck in .Net
Array Declaration:
Dim sArrIn(25000, 3) As String 'sort key (pkg, kitting, zip), kitting, data
Function Call:
[Code]....
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Jan 6, 2011
I am missing something obvious here
I have an array that is declared as
Dim
array1(,)
As
[Code]....
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Nov 7, 2011
I'm a beginner when it comes to Visual Basic coding and I need some help with an error I'm getting. I'm trying to pass a structure array to a function to figure out a student's grade. I'm getting the error that 'QuizOne' is not a member of System.Array. Here is my code:
[Code]...
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May 19, 2010
i make a function passing array paramters in VB6 Public Function PolCoefCalc(pT() As Double, pU() As Double, pN As Double, pA() As Double) As Double
Dim return as double
returnStatus = 0
PolCoefCalc = returnStatus
End Function
[Code]...
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Apr 20, 2011
Im trying to pass a array as a argument to a Javascript function from code behind(vb.net)
Code im trying
[code].....
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Oct 27, 2009
I'm program to handle ftp multiple file transfers. What I had in mind was to create an array for each type of file I need to process. There are 8 file types each needs to be transferred to a unique host.
' Each array contains in order: FILENAME|SOURCE PATH|DESTINATION PATH|HOST|USERNAME|PASSWORD
Dim arrA() As String = {"*a*.dat", "/destpath1/", "host1", "id", "pass"}
[Code].....
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Sep 6, 2005
I need to pass an uint8 array from C++ DLL to VB6 application but I receive always following error: "subscript out of range" if I try to work with the array 'pabyData' in my VB6 procedure. The C procedure is: typedef void (__stdcall *FUNCPTR2SendData) (const uint8_t* pabyData, uint16_t wDataLength); void SendData(const uint8_t* pabyData, uint16_twDataLength) { FUNCPTR2SendData vbFunc; vbFunc = (FUNCPTR2SendData) ptCBFPointers->p2NewDirectDataSMSEvnt; // ptCBFPointers are call back pointers, where is saved the call back address of VB6 functions vbFunc(pabyData, wDataLength); } The VB6 procedure is: Public Sub SendData(ByRef pabyData() As Byte, ByVal wDataLength As Integer
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May 25, 2011
I am interested in developing a multi-language program that will have a main .NET GUI but will perform calculations by calling procedures from a Fortran95 dynamic link library file. Right now I am just playing around with a very simple project in order to get the interoperability between the .NET framework and a Fortran95 (*.dll) file working correctly. So far, I've been able to pass the Fortran95 (*.dll) file an array from VB, sum all the elements of the array using an intrinsic Fortran function, and pass the scalar result back to the .NET framework with no problem. However, if I try passing Fortran the exact same array, construct the transpose of that array using another intrinsic Fortran function, and try passing the transposed array back to the .NET framework I keep throwing an exception. I am not a programming wiz, but it appears that when Fortran stores an array in memory, the .NET framework doesn't know how to read that. I am looking for some guidance on how to pass an array from the Fortran95 (*.dll) file back to the .NET framework.
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Jun 22, 2010
A c# class's single dimension byte array contains socket level instrument sensor data as per:
public static byte[] frameData
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Oct 5, 2010
So if I create an object test, and it has a property color. When I add this object to an array list I typically can access this using myarray(0).color but intellisense doesn't 'know' that I have a 'test' object inside the array. It would let me type myarray(0).whatever but would then crash if I made typo. It seems like I should be able to let it know what type of object I am trying to work with inside the arraylist. In code maybe something like this
[Code]....
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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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Sep 25, 2010
ive got some simple problem i cant understand how to solve.
str(1) is an array and integer(or double, tried both)
a(1) is an array and integer (or double, tried both)
a(1) = a(1) + 1
Label1.Text = str(1) + a
the big part is where i get: operator '+' is not defined for types 'integer' and '1-dimensional array of integer'.why do i get that message and what does it mean? how do i make the code do what i want?
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Apr 25, 2011
I'm trying to create a linked list of an array of integers. Why is the following implicit conversion required?
When I run the code that contains that conversion, I get the following error.
As a real-time data acquisition user control data (a packet of an array of bytes) arrives every second, is converted into an integer array and inserted into a linked list.
The most recently arrived data is painted as coordinates on a grid at the right of a PictureBox using Graphics.DrawLine (pen,X1,Y1,X2,Y2).
The oldest data (arriving 120 seconds ago) will be drawn at the leftmost portion of the Picturebox.
Why a linked list rather than a list? To display 120 views of time sequence data, the draw routine the most recently inserted node to a node that points to Nothing. How do I limit the length of the linked list to 120 nodes and always ensure that the last node points to Nothing?
Do While Not item Is Nothing
item = item.NextItem
Loop
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May 9, 2012
this is for a BINGO game final project that I already turned in but this just bugged me that I could not get the sorting figured out. I am trying to get this to sort the random numbers in to columns under the correct letters but I keep getting the error Operator '>=' is not defined for types '1-dimensional array of Integer' and 'Integer' under the line:
[Code]...
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Jan 30, 2011
what's the difference between variable array and object array?
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Aug 30, 2010
I am working on a project and came to a junction. I have various data in a object array, myObj().
How can one convert Object Array to Byte Array
I dont know if i should be using Memory Stream, Buffer, etc.
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Jun 19, 2011
I have an array of people stored in a custom structure array... how can i copy this array to a temp array so that the temp array has all the same values as the original custom array?
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Jul 28, 2010
I am trying to create the following program Store in a 1d array a set of 5 place names and in a 2d array the distances between the places. Ensure that the order of the places is the same in both arrays. When the names are places are input the distance between them is displayed. If they are not both in the table a suitable message is displayed
Dim town(1 To 5) As String
Dim Dist(1 To 5, 1 To 5) As Integer
Dim First As Integer
[CODE]......................
I think the best way forward is pass a parameter to the function findnumber.
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Aug 3, 2009
I am trying to pass a 2D array into a dll I wrote in C. When I run the program, it crashes at the first line (in the dll) that I try to read the array. It gives an error that it is trying to read protected memory. I'm guessing this means the array was not correctly passed to the dll, so the program is trying to read a memory location that doesn't exist. Is the problem somewhere in my VB code? If not, it must be in my C code, right?
Here is my VB code:
Declaration of the function in the dll:
Code:
Private Declare Function image_processing Lib "image_processingDLL.dll" _
(ByRef image_array As Long, ByVal dpi As Long, _
ByVal xDim As Long, ByVal yDim As Long) As result
Calling the function:
Code:
Call image_processing(hImgArray(0, 0), hImage.HorizontalResolution, _
hFilmPictureBox.Width, hFilmPictureBox.Height)
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Sep 25, 2008
I am using Visual Basic .NET 2005 and I need to call a DLL made in VB6. Couple of days ago i wrote a test dll in VB6 and called it from VB.NET. I passed an array and another variable. And the dll got it and displayed the values in the array. (I didnt save that code)Now when I am writing it again I am getting an error "Specified array was not of the expected type." [code]If I do not pass array then it accepts but otherwise it does not. The array here is CD().
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Nov 10, 2011
I'm writing this program to determine deterioration after X amount of years and i keep getting that same error.ive tried redetermining and revaluing variables.
Public Class Form1
Dim Anldep As Double
Dim endval As Double
[code]....
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Apr 20, 2012
I currently Have an array ...
Dim mTeam(10) As String
In the Form load For visual basic i have
'Load Teams
mTeam(1) = "Oklahoma"
mTeam(2) = "USC"
mTeam(3) = "LSU"
[code]....
ButtonName (button to do all the work and show messagebox) i already have a try catch to have it only take integer values between 1 and 10.
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Apr 11, 2012
I have the following code:
Private Sub setDropdowns()
Using licensingModel As New licensingEntities
[code]....
My problem is that i dont know how to define the parameter type for the sub. Because they are different types of objectSets being passed each time, I thought IObjectSet(Of EntityObject) would work, but it gives me the following error:
Unable to cast object of type 'System.Data.Objects.ObjectSet1[licensingModel.tblLookup_Country]' to
type
'System.Data.Objects.IObjectSet1[System.Data.Objects.DataClasses.EntityObject]'
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Feb 7, 2010
I have an old program written in VB6. I upgraded the program with VB 2008. The updated program works fine except when the program tries to transfer an array to another subroutine. The old VB6 program sends arr(0) as an argument to the subroutine, the address of arr(0) is passed to the subroutine. The array arr() address is the first of a block of consequent addresses one by one, arr(1), arr(2), etc.
Now when running VBnet, the address of arr(0) is not the first of all consequent arr(1), arr(2), etc. It is an isolated number, just like if arr(0) were a variable instead of an array. The addresses of arr(1), arr(2), etc do not exist in the subroutine. [Code]
The variable of y1 passes to the subroutine oK, whilst arr(0) passes also like y1 into an isolated address. So VBnet interprets arr(0) like a variable rather than the first value of a long list. I haven't been able to find out why the above sample does not work. I got stuck in my programming effort, as I cannot proceed to to further development. how the code should be modified to enable the whole array information passing through the subroutine.
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Sep 6, 2011
I m a student and new to VBI m triyng to pass an array as parrametersAnd the compiler says I havent declared the array my coding is as below
[XCODE]Sub Main() 'Fill array Dim MyArray(0 To 9) AsString For lLoop AsInteger = 1 To UBound(MyArray)
Console.Write("Enter First Name " & lLoop & ": ")
[code].....
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