IDE :: Maintaining Array's Order When Deleting A Listbox Item
Jul 24, 2009
I have made an employee list and linked it to an Access database. The initial problem I was having is that in my program I had to link their ID's and names so if you click on an employee in the listbox, his or her's ID would automatically display in the textbox below. Since I did not know how to do so, I decided to make an array and store the ID and names separately while the listbox is being compiled. And so, the form became linked and adding became easy to code.But my problem came in deleting an employee. When deleting the name should be removed from the list, but this is where the order of the arrays messed me up. How do you maintain the order of the array? Here is the code I used. I dimmed 'count' as an integer and it is responsible for keeping that order.[code]You will see Staff_CodeTextBoxes etc. and info_Staff_CodeTextBoxes. etc.These text boxes (not visible to the user) are responsible for holding the data while the array takes the data from it, or adds it's own data to it.
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Aug 12, 2009
I am working on a new domain model for an application that will have order processing for items built in (well, too keep it simple for this question anyway). I have a class "VendorItem" that represents items that can be ordered. Originally the "Order" class was going to have a list of VendorItems associated with it, but I have come across problems with it so far.
Let's say that the system has been creating orders for some time just fine. One day a user comes along and decides that a vendoritem has changed price or some other detail like packaging size. I wouldn't want the previous orders to be affected by such change. At first wash I was going to make a "OrderLine" class that is basically a copy of the "VendorItem" class, but that just feels (smells?) wrong in the OO sense. Is there a better way to refactor this so I don't have copies of classes and information in the domain model?
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Dec 24, 2009
I've been working on a little sidebar project for fun about a casino. It may have a couple of card games like, war and eventually 5 card draw. I haven't begun any card programming yet because I'm on a screen that shows players.
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Jun 21, 2010
What im trying to do is display my details in a listbox then the one that is selected frm the listbox is displayed in the textboxes and when delete button is clicked it is flagged at deleted??? This is what should happen!!:@
I kow there is definitely a problem with this piece of code im setting the index and length to constant numbers so if a different name is clicked it does not work!! is there another way to set this to allow for any length or index position??
CustomerIDTextBox.Text = DisplayCustomersListBox.Text.Substring(0, 4)
SurnameTextBox.Text = DisplayCustomersListBox.Text.Substring(5, 7)
ForenameTextBox.Text = DisplayCustomersListBox.Text.Substring(12, 10)
[Code].....
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Dec 2, 2008
This is what I currently have but it's not deleting the items, just showing a message
Code:
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles btnDelete.Click
Dim strTitle As String = ""
[code]....
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Jan 23, 2012
I am trying to delete an item from a text file based on if an item appears in a listbox but keep getting an error " Index was out of range. Must be non-negative and less than the size of the collection." The line it is returning the error on is the the first IF statement of the below text.
Code:
Dim Lines As new List(Of String) (IO.File.ReadAllLines("Carl.txt"))
For i As Integer = 0 To Lines.Count -1
If Lines(i).Contains (listBox1.text) Then
Lines.RemoveAt(i)
End If
Next
IO.File.WriteAllLines("carl.txt", Lines.ToArray)
End If
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Jul 3, 2009
How can I delete a row from an SQL database based on what item is selected in a listbox?
The listbox is populated by the database, I bound it to the data source.
I tried this code but get an error:vb
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click Dim myCriteria As String = CStr(ListBox1.SelectedItem) Dim deleteStr As String deleteStr = "DELETE customText WHERE userText = 'myCriteria' " End Sub
[Code]...
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Sep 28, 2009
my code
For i = ListBox1.Items.Count - 1 To 0 Step -1
If ListBox1.SelectedIndex = True Then
ListBox1.Items.RemoveAt(i)
[code]......
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May 26, 2011
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
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Jan 7, 2011
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:
Code:
Private Sub lstMyCourt_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lstMyCourt.SelectedIndexChanged
Dim i As Integer
[code].....
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Jul 5, 2010
In my application I have a listbox and SelectionMode should be MultiSimple because users need to see which items they selected. In another tab we have another listbox this one should show all the selection users had done in first tab. Private Sub
[Code]....
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Dec 26, 2009
I have three listboxes in an array and on form_load the listboxes initially select the fifth item in each listbox:
Private Sub frmSample_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
For i As Integer = 1 To 3
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Apr 13, 2012
I'm using the following code to read in a highscores file with the score written first and the player's name written to the next line, and then display the top 3 scores or fewer if there aren't 3 scores written to the file. A highscores display should have the scores sorted with the highest first so that's what this program tries to implement.
Array.sort() isn't doing a damn thing. In fact, the program's not even reversing the arrays like it should either. I've tested array.sort() this way with the names and scores arrays given explicitly and it works fine. I thought maybe it was still reading the data as string even though it's declared otherwise but it rounds off decimals when I change the array type to Integer so I'm pretty sure it's not that.
I have no idea why reading the data in from a file changes how it's sorted. My teacher didn't understand what was going on either. Does anyone know what's going on here?
Imports System.IO
Public Class Form2
Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
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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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Jun 21, 2010
I have a list view control on one of my forms in my program.If i click on a selected item and click on the delete button it gets removed. But i want it so that if i havent got an item selected i click on delete i get a message box telling the user to select an item to delete.
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Oct 18, 2010
I have a List of an object, set to DataSource of a BindingSource, set to DataSource of a DataGridView. Then I added a DataGridViewButtonColumn which I want a click to remove that record from the collection. So I simply call collection. RemoveAt (e.rowIndex) from the DataGridView CellClick event. However this produces an IndexOutOfRange Exception; "1 does not have a value"..
So is happening here? I have maybe a vague idea, but would like to understand exactly which events are failing etc.. and what do i need to do to perform this action properly?
EDIT: This seems not to happen if I use a BindingList.. But when using a List, I get this problem..
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Jul 25, 2009
Im having some trouble figuring out how I should delete these items. I want it to delete the one I have selected in the listview and delete the corresponding item in the DB. Ive tried various combination's and this is the latest one I have:
[Code]...
So where am I messing up? I keep getting errors no work done but when I close the form2 and open it back up no DB items show up in the Listview. But I close my project, and open it back up and they're back. All while never changing in the DB.
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Oct 13, 2011
How someone would select an item from a list box and click a button and have that item go into another listbox with it's price? I seem to be stuck on this part.
Here's my code:
I want to select the first option from the first listbox and I want to put it into another listbox along with the price of that item on the same line in the listbox. I can't seem to figure out how to that.
Public Class Form1
Const dcmPRICE_STRESS As Decimal = CDec(595.0)
Const dcmPRICE_TIME_MANAGMENT As Decimal = 695
[CODE]...
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May 14, 2012
I have an ini File which I use as an "index" of jar files. The Jars are declared in it like:
Name of the jar=c:Path
So when my application starts, the ini file gets loaded in a list view. I have a delete button, with which I want to delete the jars from the list view and the ini file. It must be possible to delete multi choiced jar references. so I thought to do it with for each, so that every selected item get searched in the ini and deleted. The Error is, that the String (is correct, I tested it with a messagebox) get analysed - Unknown escape sequence R (The error is between the ** **)
My Code:
Private Sub jarDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles jarDelete.Click
If Me.ListView1.SelectedItems.Count > 0 Then
For Each item As ListViewItem In ListView1.SelectedItems
ListView1.Items.Remove(item)
Dim GanzeZeile As String = ListView1.SelectedItems.ToString
[Code] ......
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Mar 11, 2010
So I have a program that allows the user to load up some images, which appear in a ListBox. You can click the imported images and they load into a PictureBox. [code]The path is not of a legal form.You can load up the code and see for yourself. Now I need to be able to delete these images from the ListBox. The exception occurs because the image is now null, and can't load.
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Jan 12, 2012
removing Listbox item from checked Listview item.The code I tried just errors out.
Private Sub ListView1_ItemCheck(sender As Object, e As System.Windows.Forms.ItemCheckEventArgs) Handles ListView1.ItemCheck
If (e.CurrentValue = CheckState.Unchecked) Then
ListBox1.Items.Add(Me.ListView1.Items(e.Index).Text)
ElseIf (e.CurrentValue = CheckState.Checked) Then
[Code]...
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Aug 7, 2010
Is it possible to select an item in one listbox and then display the data of another listbox with the same indexed position? I am planning a project and this is something I would like to attempt but I haven't figured out how to do it.[code..]
I tried doing the above code but instead of displaying the listbox text the message box just returned false.
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Jan 19, 2010
I have been working on software that finds a specific backup file type and lists it in a list box. Then the user selects the files he/she wants to delete. Then clicks the delete button to remove the files.I have everything finished and working excpet for deleting the actual file. I figured out the code to delete the actual list item... but I cannot figure out how to get the selected file to be deleted within its directory as well... been at it for 4 hours now.
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Feb 12, 2009
It is possibe to add a word to a listbox at runtime using an inputbox. Is there a way to delete a word from the list in a listbox at runtime?
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Oct 13, 2011
I have a form with a listbox bound to a tableadapter. Users can select from a combox, that has a list of users in it, then click "Add" to add it to the listbox and remove to remove it. This part works fine. The problem comes when updating the database:
[Code]...
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Jul 25, 2010
I've been trying to feed a multi line textbox into a string array then check item by item if a string contains part of it.
[Code]...
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Dec 9, 2011
I am trying to change an item in a selected item of a listbox.
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Jul 17, 2009
I need some code that goes through each item in a listbox and executes a for next loop for each item
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Jun 21, 2010
I'm writing a email program and i need to make it so that when I delete a item from a listbox it also deletes from a text file. Right now all it does is delete it from the listbox and when the program is reloaded its still there.
Dim arrEmailSelect As New List(Of Integer)
Dim fileContents As String
Dim thisEmail As New email
[Code]....
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Feb 18, 2010
I'm trying to delete an item from a listbox so that it wouldn't appear when i run the program again. Is there anyway you could do this.
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