Basically I need to remove Listbox1 items that are less then average, but its giving me:
System.ArgumentOutOfRangeException was unhandled
Message=InvalidArgument=Value of '9' is not valid for 'index'. [Code]
How can I find a listbox average removing the 2 lowest number? I tried
DimintSmall
AsInteger
intSmall = lstGrades.Items.Item(0)
ForEachItem
AsIntegerInlstGrades.Items
IfItem < intSmall
Then
intSmall = Item
EndIf
Next
lstGrades.SelectedItem = intSmall
I cant select or remove it
I am trying to make an application that would use an inputbox that will enter numbers until the user enters -1 after the numbers were entered and the user entered -1 the numbers would display within the listbox and the average would be in a label displaying "The average number is" & averagenumber in my current application I have it from 1-5 my question is how would i allow it to enter an unknown amount of numbers and create an counter for it.
Public Class Form1
Private counter As Integer
Private item As Double
Private average As Double
Private numbers As Double
[Code] .....
Im working on a school project where i add items to a listbox in two columns. The first being the name of a course and the second being the credit hours of the course. I can add and remove the items just fine BUT when i remove an item im also required to subtract the credit hours of said item from a variable i have called "totalhours." Essentially im trying to figure out how to subtract a certain piece of a selected listbox item from my class level variable.
View 2 RepliesI got this code but it won't work...
For Each item In ListBox1.Items
For i As Integer = 0 To ListView1.Items.Count - 1
If item.ToString = ListView1.Items(i).Text And ListView1.Items(i).SubItems(1).Text = TextBox4.Text Then
[code]....
It only deletes 1 listbox item while there are more items that have to be deleted.after debugging i get this:List that this enumerator is bound to has been modified. An enumerator can only be used if the list does not change.
I want to remove items from a listbox 1 at a time. I have two timers set up to remove the two types of items that are put into the list box. When there is a "Player 1 killed Button 1" following a "Player 1 killed Button 2" or vise-versa they get removed at the same time. Is there any way to prevent this?
Code:
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim XP As Integer
[Code] .....
I need to know if there is a way to remove any items from a listbox if they contain no text. Like if there are three items(Blah, ,Blah) listed in the listbox like so (remove the middle line that is empty so the listbox now contains two items(Blah, Blah) listed like so Or if there is a way to do this to a textbox that would work too. I'm working in VB 2010
View 3 Repliesi'm creating a web form and i want a user to be able to make certain selections and then add the selections to a text box or listbox.Basically i want them to be able to type someone name in a text box ... check some check boxes and for it up date either a text for or a list box with the result on button click...
e.g.
John Smith Check1 Check3 Check5
How would I remove an item from the listbox.. I used the code below to populate using a class with description and value properties.
I cant use listbox.items.indexOf("listitem1") to get index
I cant use listbox.items.remove("listitem1")
If I use listitem.items.removeAt(1) it works of course. How can I get my index in this case?
'Users
Dim IAdapter2 As New ds_SecurityTableAdapters.Security_UsersTableAdapter
Dim usersDT As ds_Security.Security_UsersDataTable = Nothing
usersDT = IAdapter2.GetUsers()
Dim userItems As New List(Of myItem)
[Code] .....
I have to make a listbox with a few(8) names in it & double clicking on a name in the listbox will removed the name from it. I have already add the names into the form using the listbox.items.add method & would display the names in it. Then I enter the coding for 8 names in double_click procedure (listbox) using the "listbox.items.remove" method. However, when I try double clicking on a name in the listbox, it would remove all the names instead.
View 2 RepliesPublic Structure ReportOrderType
Public ReportName As String
Public ReportDate As Date
Public SaveFile As String
End Structure
[Code] ....
Basically, I have a list of reports. In one place they get ordered, and later on the program looks to see which ones have come back -- see if the .SaveFile exists on disk. If it exists, then that report gets processed, and then I want to remove that item from the list of reports-on-order. However, I get an error message back that by doing the .Remove(R), I've changed the list itself & things won't go well with the rest of the For Each loop, which makes some sense.
When I get to this routine, the list of ordered reports will be something from a couple of dozen or less, and some number of them (perhaps zero, perhaps all, probably a few) will exist & be processed & then should be removed from the list. How should I go about accomplishing this? This is my first time working with List(of t) as a Visual Basic tool; everything I've used in the past has been with arrays, and I can do this there.
I have the following
Public itemArray As New List(Of ItemArrayStructure)
Public Structure ItemArrayStructure
Dim DisplayText As String
Dim Checked As Boolean
End Structure
If I know the DisplayText of an item in this array, how can I remove it?
i want to remove all selecteditems i tried to use this loop but it didn't work
Dim a As String
For Each a In History_Textbox.SelectedItems
History_Textbox.Items.Remove(a)
Next
How do i do it because that just didn't do anything
I am using VB.NET (version 2008). I have two types of items populating in a listbox (checked listbox). For example: lets say one is type "A" and other is "Type B". Their names maybe same so if the user sees those items in listbox then he won;t be able to determine their type until he click on them and checks out its properties. I wanted that I add each item to listbox and colour them so that blue for example means type "A" is there and red means the other. So this way I will be able to know at a glance that how many item of what type is present. I guess it may not be possible to do that in a standard checkedlistbox. I am also using component factory's krypton controls which enhance the gui of an application. But I dunno if I can progress using that.
View 5 RepliesImports System.Collections.GenericI
mports System.Net
Imports System.IO
Public Class Form2
'Dim filename As String
Public ftpSettings As FtpClient
[Code]...
I don't know what's wrong, i can only move the 1st item but the second and so on doesn't make any changes. It remains in a listbox.
I want to create a program that will let the user input a number and it will go to listbox1. Then listbox2 and 3 will do some algorithms that i made. The only problem that i'm encountering is the average of listbox3.
I have 3 textbox, 1 button, 3 listboxes.the names of the objects is default except to textbox2 and textbox3, I change their name to AveTTTextbox and AveWTTextbox.I use AveTTTextbox to get the output of the average for listbox2 and AveWTTextbox to get the average output of listbox3.[code]....
I've got an arrayList full of ints, how do i find the average value in it?
View 2 RepliesI've been working on a little project recently which is a music player (unoriginal I know, but I'm just learning ). Basically, I want the items that have been added into the listbox to be remembered for the next time the application is opened so that you don't have to re-add the items. The items show up like this (because they are added from my documents): C:UsersEthanDocumentsMusicCage The Elephant - Aint No Rest For the Wicked.mp3?
View 4 Repliesi am trying to make a program that adds up all of the numbers in a list box and displays them in a text box, how do i do it?t
View 2 RepliesI am using a listbox that is filled with a list of items from Database. When I am deleting an item from the listbox it is has to be deleted from Database, and that is all working fine.The problem is, even after deleting the item from the listbox, it is showing in the listbox, I have to close and restart the app to get the deleted item off from the listbox.
Is there any way to remove an item from listbox at the same time? I don't want to use timer to refresh is there any other way to refresh the listbox items???
I am making a program, and I have a listbox which will contain A big list of file Paths. I have two buttons Add and remove. Adding items is easy and I have done this. But removing items is the hard part because the listbox is multiselect. I have tried so many attempts It wouldn't be useful to post code. But the closest attempt is
[Code]...
I am wondering how i would go about taking multiple items (randomly) from a listbox and displaying them in a label!Now this listbox wouldn't have to be visible, maybe i can do it without it even being a listbox?I want to have 25 labels and each one recalls a random value from the list (doesnt matter about being unique and the list will contain about 20-30 items)Im just a bit stumped on how to do it as ive done some looking into it but most people are asking for randomized numbers or unique items where as i need randomized items from a list which aren't unique!
View 2 RepliesTrying to get the user to put 3 numbers in 3 text boxes and get the average.Private Sub btnAverage_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAverage.Click
Dim a As Integer = CInt(txtone.Text)
Dim b As Integer = CInt(txtTwo.Text)
Dim c As Integer = CInt(txtThree.Text)
[code].....
I have being having an issue when trying to find the average between 3 groups, female ("F") , male ("M") and Both Together but it seems that my If statement isn't working as only the "sumOfAllAverage" is showing and the rest is returning an value of "0"
[Code]...
I have a listbox control on my form that has SelectionMode as MultiSimple so I can select more than one item with my mouse. I added a contextMenuStrip to my form and added it to my listbox. I'd like the user to be able to select a few items in the listbox and when they right click > Copy it would copy the contents of the selected items to the Clipboard.
[Code]...
I have this code to add Items to a Listbox:
Private Structure Bets
Public id As Long
Public name As String
Public size As Double
[code]....
I googled to find how I can change the items forecolor or backcolor. I want the items containing "Unmatched" to be one color and "Matched" another.
basically i had this problem before which i fixed with this code!
'REMOVE TIME
If ListBox1.SelectedIndex <> -1 Then
Dim Box As MsgBoxResult = MsgBox("Are you sure you want to remove this time?", MsgBoxStyle.YesNo)
[Code]....
It worked perfectly, all ive done to my code since is change the way the listboc is loaded / saved, it now comes from a .txt in My Documents rather than the C drive.
It now only deleted the top value of the group selected int he listbox and not all of them as it did before.
How do I disable buttons while there are less than 2 items in a listbox? I can't figure out how to do it. I'm a newbie in Visual Basic(programming at all)
View 7 RepliesI want to get items into the ListBox from Database on FormLoad.
My code is:
database
Private Sub Models_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim qry As String
[Code]....
I am already having three models in database that has to be loaded in ListBox on formload.
How would you sort the items only after the line but in the same listbox?
View 3 Replies