Array Dimensions - Error Message 'ReDim' Cannot Change The Number Of Dimensions Of An Array?
Oct 20, 2011
I'm upgrading my VB6 project to VB.NET and I found one of the problem below relating to dimensional array.Here's my VB6 coding :
Private Function ConvertMatrixToBase0(ByVal MyMat() As Double) As Double()
Dim i, j As Long
Dim ConvMat() As Double[code.]...
When i port it over to VB.NET, i encountered error message 'ReDim' cannot change the number of dimensions of an array. for the line highlighted in red. And I suspect that VB.NET need to always define the exact dimension of the array during the declaration. But for the function above, for the array of 'MyMat()', I do not know what is the exact dimension every time it runs, and that is why i need to check the dimension of the array.My question is do we have any solution in dealing unknown dimension array in VB.NET? As in VB6, we can just define Array() instead of Array (,) in VB.NET.
The code below is the entire class that has the error in it... the errored code is highlighted in red. The error is,'ReDim' cannot change the number of dimensions of an array.
Code: Public Class clsMap Dim SR As System.IO.StreamReader Public Width As Integer Public Height As Integer
I have this recently converted application from vb6 to vb.net 2008. One of the errors stated is:'Point' is not a member of 'System. Windows. Forms. PictureBox'.I have searched and not found an alternative to this.Also, it says ReDim cannot change the number of dimensions in an array.
Trying to upload a picture file from an online source and store it in a byte array but am having the error: "Number of Indices is less than the number of dimensions in the indexed array".
Dim Bytes() as Byte Dim Inet1 as System.Net.Webrequest
I am trouble in sorting 2 dimensions array in vb.net. One row has 5 columns. Original array have 3000 rows.How can I get the effective sorting with pdtId. I tried to find googling, cannot get the right answer to me.
(0, 0) = pdtId "string" (0, 1) = brand name (0, 2) = category Id (0, 3) = url (0, 4) = date
I wounder if there is a way to get the values from array's dimensions, without knowing how many dimensions the array has.I know how to do if I know the array's dimensions, but not a clue if I don't know the array's dimensions.
Public Sub LoadFromFile() Dim sr As New StreamReader("CoverageArea.dat") Dim strAreaLine As String[code].....
I have a question about that strAreaInfo()...I left the () with no number in it so that it wouldn't have a set # of values, and then I tried to give it 3 values, but I get the error in the title. Am I doing something wrong when I declare it?
After user entered a value into textbox (for example 4), datargidview must be create automatically(number of datargidview's columns and rows must be textbox value). And, user enter some values that among 0 and 1 into datagridview's cells. So i want to assing these values (values that are written in datgridview cells). For example, if user enter 0.25 in datagridview's cell 1, and 0.34 cell 2, 0.67 cell 3, and etc, in this instance array(1,1)=0.25, array(1,2)=0.34, array(1,3)=0.67 must be assigned. i hope, i could understand :) i illustrate this example below. i want to assign such as indexs that is written into following example table.
I'm trying to write some of my own linear algebra methods, and I'd like them to work independent of the number of dimensions of the array. However, there doesn't seem to be any generic method, that I can see, for looking up a particular element in an array of arbitrary size. I mean I could write code to find the rank and then use (), (,), (,,), (,,,), etc, but that seems rather cumbersome.
I have a gridview in my asp.net website that and I use vb for the code behind. Each time a row is bound an even called the Gridview_RowDatabound event is fired. So what I am doing is looping through all the cells in that row: [Code]
Problem is I get an error saying redim can only change the rightmost dimension. It would suit my needs to change both dimensions here as my final result will be to total each column in the array. what other method can i use if arrays don't suit this task.
As you will see from the code below I need to be able to tell before the array runs how many members of the array there are or else the program will crash. How can I redim the array depending on how many lines are in the text file (RECORDS.txt)
Imports System.IO Public Class Form1 Structure Nation Dim name As String Dim continent As String [Code] .....
As you will see from the code below I need to be able to tell before the arrayruns how many members of the array there are or else the program will crash. How can I redim the array depending on how many lines are in the text file (RECORDS.txt
Imports System.IO Public Class Form1 Structure Nation
This is my structure... <Serializable()> _ Public Class AcctRecords Public Amount() As Long Public DateC() As String [Code] .....
This is where I try to create a new instance but I get an error that states: Overload Resolution Failed Because No Accessible "NEW" accepts this number of ArgumentsPrivate Sub FixMasterArraySize(ByVal Cnt As Integer) ReDim Preserve Acct.Master(Cnt) For I As Integer = 0 To Acct.Master.Length - 1 Acct.Master(I).AcctType = New String Next End Sub
If Acct.Master(I).AcctType was a Boolean type there would be no error..
I am trying to compare two arrays that always have different dimensions. e.g. arr1 -> {1,2,3} and arr2->{1,2}
I did try and able to get the matching items to new array. But I am expecting to get the unmatched items only. I am expecting to compare both arrays and put only the item '3' to a new array which is in arr1 and not in arr2 e.g. arr1 -> {1,2,3} and arr2->{1,2} should result a new array with 3 arr1 -> {1,2,3,4} and arr2->{1,2} should result a array with 3,4 Is there any way of doing this for older version of .net framework without using Enumerable.Except
I'm uploading a flv / swf file and I need to capture the dimensions of those files so I could later retrieve it from a database and embed it into a page.
I would like to get the screen dimensions so I can programatically change the size of a form upto these values. I'm new to .Net and things are little different then they used to be in earlier version of VB. How do I do it?
i have found the Hwnd for a window and i now wish to get information about this window, the location on the screen of the window and its width and height. Problem is the values i get are not anything near right.
vb.Net <DllImport("User32.dll")> _ Private Shared Function GetWindowRect(ByVal hWnd As IntPtr, ByRef lpRect As Rect) As Boolean
[Code].....
this returns 0 for height and width and the remaining figures are nearly 0 (1.68E-311) what am i missing and how can i get this information?
I'm reading in an image (jpg) using the code below and I need to check that the image is no bigger than 150 pixels by 150 pixels and is less than 25k, how should I do this?
I wanted to know if u define a dimension in a function or subroutine and that func/sub is called say 5 times, does the memory new block of memory get assigned to it every time the func/sub is run or does it use the one it got assigned the first time?
Is there an easy way to get the dimensions in real time of the area of a mdi parent form that is used to display the child forms (i.e. without the tool bars or title bar).
In a case where you would like to reset an array of boolean values what is faster, rediming the array or enumerating and resetting the values? I have run some tests and they seem to suggest that a redim is a lot faster but I am not convinced that it isnt a result of how I'm running the tests.
My tests seem to suggest that redim is nearly twice as fast.So could anyone care to comment on which is faster and why? Also would you expect the same result across different languages?
I have the following array in my project that I'm trying to redim without losing the values.The problem with redim preserve is I can only redim the last dimension of the array. I want to redim the 2nd dimension without losing data. How do I get this to work?[code]
[edit]Sorry I left a bad title in this thread - confusing![/edit] Been a long time since I used an array - they are so limiting...But I need to build a simple string array - that I'm passing to a C/C++ function.
Is there any other way to do this other than keep REDIM PRESERVING??
