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) ?
I would like to show a mathematical summation in a rich text box, using the standard mathematical notation that shows a Greek capital sigma, with the starting value of n below the sigma and an infinity sign above it. I have successfully done this using the code below, but I cannot get the infinity sign closer to the sigma. It looks like it is not part of the summation notation.
Does anyone have an idea how I can get the infinity sign lower? When I use a character offset to lower it, it also lowers the lines below it, so that the distance between the infinity sign and the sigma remains unchanged.
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 MsgBox(serialports(i).portname) Next
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
I feel quite silly asking this, but I couldn't find a definite answer anywhere. in vb.net, 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?
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]
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
[Code]....
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...
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:-
[Code]...
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.
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.
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 Dim decScore5, decScore6, decScore7, decScore8, decScore9 As Decimal
I have a class I am working on for a program I am writing while I am stuck at hospital 3x a week and was wondering. If my class has a Reset function that sets the count variable to 0, can I then say that the Data array is equal to "nothing" and wipe all the data that was in it?
Below is the class structure so far: Private Count As Integer = 0 Private Data() As Integer Public Sub Add(ByVal value As Integer) Count = Count + 1 [Code] .....
For example, I have an integer array called sec1() that has 71 elements.
I tried:
vb sec1(1 - 71) += 1 But when I run the program, it gives me an error. Not a red-underline error, some other error that doesn't stop the program from compiling but stops it from running. Is there a way for me to modify all of the element of my array at once? just out of curiosity will the same method work for string arrays?
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:
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 vb.net way of doing the same thing
Bit of a learning question, just looking for neat ways to do the same thing
I have the following code to display filenames in a gridview. the variable filename contains the filenames that are present in a folder. now i want to store these filename values into a string array for further usage.[code]
I have an array which holds number of elements. Now I need to create an xls file and need to write all the members of array into xls file, like one member for each cell.[code]Now I need to create examle.xls file and write above input() elements into example.xls
why my code doesn't work? I want the array elements to be loaded into a listbox when the button is clicked. Is it because not all elements in my array have been filled? I've tried putting the array declaration as a global variable and as a local one (below), but the same error occurs as soon as the button is clicked - "ArgumentNullException was unhandled".
Private Sub btnLoadCustomerNames_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLoadCustomerNames.Click 'String array holds maximum 100 customer names
How to remove the Nothing elements from an array using a For or For Each loop? I have to display the array to a datagrid, but the Nothing elements of the shows up as zeros. This is the code I have so far for my button click event:
Dim flag As Boolean = False Dim found As Integer For m As Integer = 0 To carArray.Length - 1 If carArray(m).carid = txtDelete.Text Then carArray(m) = Nothing flag = True found = m End If Next
Is there a succint way in vb.net to create an array or similar of each of the properties in a list?
E.g. If I have a list of 'a' and each 'a' has a property 'b', I want to create an array which contains all the 'b's, in the same index positions as the original list.
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
