I am the kind of person who learns as they need it and this time I cannot figure this one out :SI have a listbox with n amount of items.I am trying to add n amount of items to an array and then save the entire array to a textfile.How should I go about this? I have Google'd around and code I have adapted or straight out copy-pasted (sad I know) is throwing all kinds of errors :S
View 5 RepliesI have this form and I want when any of the RadioButtons is checked, then some items appear in the list.
in the group box1 : I used this code Private Sub RadioButton1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RadioButton1.CheckedChanged, RadioButton2.CheckedChanged
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Each time when a user clicks on an item in the listbox (items are integers only), this item should be added in an array . Array should be sorted at each click from smallest to largest values and must be shown somehow .
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problem that i am facing is i want to add array of object as a single item in listbox. in vb6 i was using this Label1.Caption = Label1.Caption & Mid$ (strInput, intI, 1) & " " List1.AddItem (Label1.Caption) i was using label. caption to store object but not work in vs2008 because label.text only take text and left other values
View 18 RepliesI 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?
View 4 RepliesI cannot get the 2 dimensional array I am working on to show up in the listbox.
Dim strInventory(9, 2) As String
strInventory(0, 0) = "2in x 6in Lumber"
strInventory(0, 1) = "10 Feet"
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how would you clear a listbox, like with a button.
View 3 RepliesI have this code which lets you choose a class, then enter 3 names into the roster listbox...the problem im having is with the btn grades...im using a nested loop but cant figure out how to get all 3 names into 3 seperate inputbox prompts to input the grades...right now its only showing the first name entered...how do you get the code to loop and go through whatever amount of students entered in the roster listbox into the grade listbox.
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I am getting an error that I can't track down.
Elsewhere in the project:
Public teamname (numteams) as string.
In this form as a form load event
For i = 1 to numteams
Listbox1.items.add (teamname(I))
next i
I get an error message to try new but I can't figure out what it means.
Imports System.Net Public Class Form1
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Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
have a few items in my listbox how would I convert it into an array?
View 19 RepliesI have to convert what i put into an input box, and somehow convert that into an array.
My project is to put in some random numbers from an inputbox into a listbox, then somehow converting those numbers into an array and find the median of those numbers. I'm able to do the math, and I'm sure its probably 2 or 3 lines of code
I know there's a one-liner piece of code that converts my Listbox Items to an Array.
I'm trying to save listbox contents to a file using System.IO.File.WriteAllLines.
my code
For i = ListBox1.Items.Count - 1 To 0 Step -1
If ListBox1.SelectedIndex = True Then
ListBox1.Items.RemoveAt(i)
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I am trying to get the items out of a listbox and put into a text box .. I am putting the listbox items into an array and I keep getting this error: InvalidArgument=Value of '1' is not valid for 'index'. Parameter name: index
bolded code where this occurs here is my
Private Sub btn_BuildText_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_BuildText.Click
Dim delimiter As String 'Holds the String character representing the chosen delimiter
Dim i As Integer 'Loop counter
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I am trying to populate an array from a listbox.My listbox items contain something like this:
1 for January
10 for February
3 for March
I have code in place and it was working, but I am taking the first character of the listbox item to populate the array. If the value of the listbox is 10 for February, I need to get 10, not just 1. Can I do something with the string that says I want to trim everything from the space to the end? Since they are all formatted the same way, if I could trim out anything from the space on, that would work.
Here's what I currently have:
ReDim m_adecRainfall(m_astrMonths.Length - 1)
For intCount = 0 To m_astrMonths.Length - 1
m_adecRainfall(intCount) = CDec(lstMontlyRainfall.Items(intStart).ToString.Su bstring(0, 1))
intStart += 1
Next
Imports db = System.Data
Public Class CustomerADO
Dim cid As Integer
Dim fn, ln, em, pw As String
Dim bl As Decimal
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What should I do in the while loop to make array of customers objects. And what should be the code in the form to add this array of customers to listbox.
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
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I have a listbox with selection mode set to multiExtended. I want to put whatever is selected into an array, but I can't seem to figure out how to do it. Here is what I have so far, but with this code the selected values go into a single variable and not into an array so only the last item selected is stored.[code]....
View 4 RepliesI'm close to getting this to work, but currently can't get any output to display in the listbox. I had it working, but needed to move some things around to get the join function to work.In my program, a user enters input into a textbox and an array is displayed in a listbox based on what they type in. For example, if they type in "a", all foods (in the textfile that is connected to the program) that start with "a" will be displayed.
When there is output, I need to find a way to name this array (which is created based on what the user inputs) and join all of the items in the listbox (example: foods stacked on top of each other in the listbox will be shown at the bottom as a string).I am posting the code that I have thus far; all of the errors that I'm getting (and potentially my logic errors) are just in the first public class until the end of the first if-next statement:
Public Class frmFoods
Dim foods() As String = IO.File.ReadAllLines("foods.txt")
Private Sub btnDisplay_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDisplay.Click
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I've got a listbox in visual basic 2008 with lines that look like:
item 0; item 1; item 2; item 3
How can I select that line and change within that line the value of e.g. item 3? (by default it's set to 0 and should be set to a value > 0 when entered by the user.
After that I need to calculate the total price based on the price in item 2 and the new value of item 3 (being >0)
I'm programming an application in VB.NET in which I need to take the Items from a ListBox, which are an ListBox.ObjectCollection and convert into a String array to be passed as a parameter to a Sub procedure.
View 1 RepliesI have an array list declared globally as
Dim OnGraph as new ArrayList
I also get these two debug error.
I got the textbox and a listbox and a button, I can add names threw the textbox hit the button to add and it adds to the listbox, now I need to take the names from there and randomize them into 4 groups and make it into an array also, I just dont know how to take the names I entered and randomize them and put them into 4 different groups without repeating themselves, it is ok if three groups that have 5 and the fourth has 6. They just need to be randomized and put into 4 different groups,This is what I have, but I think its the wrong way to do this, to make the code work right atleast.[code]
View 5 RepliesI'm trying to take items from a list box, add them to an array and then output the array items to a text file using Visual Basic 2008 express.The number of items in the list is unknown so I can't set the array size to start.[code]I'm sure this is easier than I'm thinking but after searching google, finding multiple different "methods" and having none of them work for me,
View 3 RepliesI am writing a program for a class on visual basic and i have a listbox that displays 15 random numbers using an array. Then there are 2 buttons(max and min) that when clicked displays the largest number in the list and the smallest. how do i get these buttons to do this?
View 6 RepliesI am working on an assignment where I need to have a product list that is loaded into a list box upon the form loading. This is generated from a txt file in the /debug folder upon loading. Now my question is how do I have the product names show up in the list box when there are 3 separate parts to each product. The product, the cost, and the quantity in inventory, and all I want to show up is the product in the listbox, where the rest show up elsewhere.
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'This procedure loads the data for the array from txt file. As well as loading the Product.txt file into the system when the program loads.
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I have a huge assignment tommorow in which i have to make a trivia game on visual basic. In this game you have to be able to make your own questions (modify/delete etc). Basically I have one form where you can add questions into one listbox and answers into another listbox. Now i have another form with the actual game board. I want to load each individual listbox item from the other form into the array on the game board form. Example. the first item of form2.listbox1 into question(1)
I got this so far
Private Sub Form5_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim i As Integer
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Basically, the user can type in a name and a job description into two different txt boxes and then click add. It then adds the name to the listbox and stores it in a string list (Public strList As New List(Of String)) it also stores the job description in a string list as well (Public strListDescription As New List(Of String))Then when you select an item in the list box it knows what data to bring up in the txt boxes using an array with these lists:
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Private Sub lstMyCourt_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lstMyCourt.SelectedIndexChanged
Dim i As Integer
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I generated 10 random numbers and put it in array V0(9) but I have problem to display the array numbers in listbox.
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