An Array Of Objects - An Entry Will Be Stored In Serialports(4), All Other Array Elements Will Be Blank?

Jun 1, 2009

I've come up with the following and it's partly working.

Public serial1, serial2, serial3, serial4, serial5 As SerialPort
Public serialports() As Object = New Object() {serial1, serial2, serial3, serial4, serial5}
dComPort = "COM4"[code]....

The above code works fine! But im having trouble trying to now retreive whats stored in the array.In the above example, an entry will be stored in serialports(4), all other array elements will be blank.If I do this it works.

MsgBox(serialports(4).PortName) ' this retuns the value COM4

But I'd like to loop though all array elements and print out ALL the PortNames, The below code doesnt work, I get an error Object variable or With block variable not set.

For i = 0 To serialports.Length - 1


.net - Adding Blank Elements To Array?

Feb 23, 2010

I have an array x in size of objects (between 1 and 100) and I want to increase the size to 101 ... I've resized the array and that adds the objects but unfortunatly (not suprising) the added items have not been initialised, do I've reverted to using a do while loop and adding the elements indiviually, but looking at the code around it where addrange is used extensivily, I was just wondering if that was a neat way of doing the same thing

Bit of a learning question, just looking for neat ways to do the same thing

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Apr 17, 2007

I have been assigned to create a simple address book in VB 2005 and have got as far as I can with it. Contact entries are to be stored as an array of objects rather than to .txt file or access database (I know they will all be lost when shut down). I suspect this is probably pretty straightforward if you know anything about VB - unlike myself obviously.

Public Class Form1
Private objContact As New ArrayList
Private Sub BtnAddContact_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnAddContact.Click
Dim objcontact(100) As Contact
[Code] .....

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Jun 19, 2009

I'm trying to sort an array based on a structure but whenever I do this, it basically erases all the data in the entire array.I have verified that the array is populated correctly, it is when using array.sort that everything returns blank.

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Merge Array Of Elements Into Larger Array When Element Order Is Different?

Nov 23, 2010

Assume I have an array myArray1 = { A, B, C, D, E, F, ., T}I have another that contains a subset of the elements of myArray1 but where the order may vary

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Sep 13, 2011

I feel quite silly asking this, but I couldn't find a definite answer anywhere. in, how are the array elements defined (if they are defined) for, for example:

Dim myarray(5) as int

does, at this point in time, myarray(3) for example have a defined value? If so, what is it?

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Nov 29, 2010

check if array consist of only elements from another array

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Jun 5, 2011

I have a one-dimensional array that has one number per element. I also have a variable number, var. I need to take the number of elements from the first array that equals the var and put it into a second array with commas between the numbers. I would also like to have a title element in the second array. [Code]

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Sep 11, 2009

I am trying to add the values in my array.. and this is my code

dim totals(6) as decimal
public function AddIBNRTotal(byval Amt as decimal,srvcdesc as string) as decimal
if srvcdesc = "ZZ_TOTAL" then


I know the addIBNRfunction works fine cause it is displaying the correct amounts in my textbox

but when i call the Sumnumber() i am getting 70000 dollars short...

So is this the right way to add values or elements to a array...

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Mar 29, 2011

How would you code this so that it adds up the first column, and then the second column?

Dim intSales(,) As Integer = {{100000, 150000}, _
{90000, 120000}, _
{75000, 210000}, _


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Apr 30, 2009

I am using Visual Basic 2008, and I am making a simple meeting planner program. The data stored for each day is stored into an array with three fields:



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Jul 2, 2012

I have got an array being populated which works fine What i want it to do is to return one of the items in the array (within a text box for example) which corrects certain criteria.


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Sep 11, 2009

I am trying to create a array and then add elements to it based on some conditions and then add the elements in the array and display it...

but i am getting a larger number that expected..

this is my code

Dim IBNRTotal as decimal
dim element as integer
dim totals(6) as decimal -- create a array3


i know the amt value correct cause in return amt.. i am seeing the right value but somehow when it goes to the array and when i add the whole thing it doesnt seems right...

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Feb 25, 2009

I am just starting VB at 60 years old and with no programming experience and nobody to ask for help...except here, of course. So needless to say I am hitting brickwalls. I am using "Murach's Visual Basic 2008" and it seems to be a good book. This is what I am up to I have to declare an array with 5 elements with an index. I think that part is OK. Then add code that adds each element to the next one every time a user clicks a button. I have had many tries but the best I can get is just the grand total of the elements. Here is the code I came up with:-


Is anyone able to show me how the button click would reveal a progressive total of the elements each time a user clicked on it? It would be good if the book came with answers or had a forum for their readers.

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Jun 14, 2010

way to assign value to elements of an Array. For an example,

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Cheques(2) = Cheque2
Cheques(3) = Cheque3


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Jan 19, 2012

Now I'm VERY new at the reading in a text file and storing into arrays thing and tried for hours last night to figure this out, googling and every possible way of writing the code. However, I don't know what to try next and I'm getting more confused by the minute. I have a text file which I load into my program. This data is stored into 6 arrays, each of which has data that comes from either a combobox, date or text field. What I'm trying to do is to find the count of items in each index of the array.


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May 12, 2009

In this case I'm trying to create a number analysis app. I'm required to declare an array and get the data for the array using ten text boxes. Why, because my instructor said so.

My problem is my event is returning zero. Therefore I believe my code is somehow flawed.

My approach is to create functions that calculate the required metrics. I have only tried to code one function to date. If I can get help making one function work, I will be able to do the others .

Public Class Form1
Dim decScore0, decScore1, decScore2, decScore3, decScore4 As Decimal
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Below is the class structure so far:
Private Count As Integer = 0
Private Data() As Integer
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Count = Count + 1
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May 9, 2011

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I tried:

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Apr 25, 2009

I am trying to teach myself programming and I am on the subject of arrays. I want to create a simple program that asks the user to input 5 numbers and then outputs those numbers to the user. The program is a console application and I'm using Visual Basic 2005. My code is as follows:


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Oct 27, 2010

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Dim Tmp(200,200) as integer
For LpX = 1 to 200
For LpY = 1 to 200


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Apr 24, 2010

I have an array object called arr() from arr_class. I get problem in calling each elements of it.Here is the classarr_class

Public Class arr_class
Dim _val1() As Integer
Dim _val2() As Integer


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Feb 19, 2012

I Declared my Array like this[code]...

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Private Sub btnLoadCustomerNames_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLoadCustomerNames.Click
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Mar 24, 2010

If there is an array with elements: 1,2,3,4, the program should return another array with sum of all combinations:



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So i run a loop that is an iteration for array variables. for i = 1 to 1000summation = summation + array(i)next iyet for every iteration, array(i) contains a different set elements, and I need to know the sum of these elements for every iteration step.For some reason VB saves the values from previous iteration(s) and adds them to the new.The question is: how do I sum a new set of array elements for every iteration without using the older values.? Can I:  dim array(number of elements as a function of something) ?

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Oct 20, 2011

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Dim flag As Boolean = False
Dim found As Integer
For m As Integer = 0 To carArray.Length - 1
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Mar 25, 2012

Is there a succint way in to create an array or similar of each of the properties in a list?

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Mar 21, 2011

I am getting an error when helping someone with their code. They are trying to create an array of Items, but gets an error at ItemStruc(counter).ItemName = Contents(0)

I am not sure why. >_>

Structure is as follows:
public structure Item
dim itemName as String


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Mar 2, 2011

I have the following in a .Net 2.0 app:

Private chequeColl() As Cheque
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I now want to make chequeColl only contain those items where Status is not equal to 41. In LINQ this would be easy but I can't think how to do it.

I cannot use the .Net 2.0 LINQ bridge products, I have to do this the old school way. At the end of it chequeColl must only contain those items that are not status of 41. I cannot have empty elements.

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Jan 10, 2012

I read a line from a text file with text as "ABC.txt", "XYZ.txt", "TEST.txt".I use code file = sr.ReadLine(); to assign the text to variable file. Now I want to initiate a string array likestring[] FileNames = {file}; it doesn't work. What should I do?

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Nov 5, 2009

How to get values for array elements in VB.nET from the user.also i wanted to display these values in the combo box.[this is easy i could manage this].

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Oct 4, 2011

Let's say I have regular string called tempstring, and I want to change a specific item in that string. Like if tempstring = ";1;2;3" and I want to change the "2" to "Baboon." Here's my best solution on how to do it:

Tempstring = ";1;2;3"
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This works, however, it feels a little heavy. Is there an easier way to do this? Perhaps a way to directly replace datasplits without readding them all to another string one by one using a loop?

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Mar 5, 2012

I long variable in which contains the following information,

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Dim strArr() As String = g.Split("$") 'This variable is empty
For count = 0 To strArr.Length - 1
Dim arr As String = strArr(count).Split("")


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