I am populating a combobox with data from a .txt file; however, there are 1000 entries but only 4 different possibilites 1, 2, 3, and 4. How can I have the combobox only allow a selection of the 1-4 with repeating all 1000 numbers?
View 3 RepliesI was generously guided by the community to use LINQ to find duplicates on my listboxes the last time around. However, I am now in a tough spot because I need to find and remove duplicates from a multicolumn list view. I tried using LINQ but it says that the listview object is not "queryable". Is there a way for me to find and remove duplicates using only one column of the listview? [code]The code now runs fine when I call it. But it does not remove the duplicates:
View 1 RepliesI have a List object and I want to remove the duplicated items but leaving at least one of the duplicated items in the list;I wrote something like this however I would optimize this code for better performance, is there something faster?
Const chars As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
Dim rnd As New Random()
Dim mylist As List(Of String) = Enumerable.Range(1, 100).Select(Function(i)
[code].....
I have been working on a pythagorean theorem calculator and am actually stuck on the final bit of code. What I am trying to do is check the values (integers) inside a listbox, remove duplicate number (both values), and input one of the values into a textbox.
Here is an example of what I am doing:
LISTBOX VALUES
2
2
3
[code]....
When the program runs, check listbox value #1 and listbox value #2, if listbox value #1 and #2 match (2 & 2), input that value (not both duplicates) into a variable, remove both of the duplicate values, continue checking the rest of the values, and finally multiply the leftover values. I am sure that sounds confusing. Here is what the final output will look like
LISTBOX VALUES
3
7
[code]....
I am reading a textfile and extracting information from each line. For example string1 and string2. I am then writing these string to a datatable.
However, sometimes there will be repeats in string1 and string2.
If there are repeated lines I would like to be able to delete the repeating line and add a counter to find the total number of repeating lines.
so if a string repeates 3 times I would like there to be a column with a 3 displayed next to the line in my datatable.
My visual studio 2005 has been running great up till now The menu items in the menu toolbar display exactly as follows:File File Edit Edit View View File File Edit Edit View View Tools Tools Tools Tools Window Window Community Community Help Help Window Window Community Community Help Help
Error List is displayed as follows:(I've excluded the icons)0 Errors 0 Errors 0 Warnings 0 Warnings 0 Messages 0 Messages The standard toolbar images are also displayed in 'duplicate'
This is before I open a project and visual studio is on the start page. The 'duplicates' do not go away even when a project is open.When project is open, Solution explorer displays duplicate images as well
I've tried all the following but still cannot get it to display normally. Restored my computer to a time when it was working ok. Full scan on my computer with AVG premium which includes spyware etc (No viruses , etc found) All software is updated fully
Imports 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.
How do i read through a textfile line by line checking for and removing duplicate values?
View 1 RepliesI have a List(of String). For example: {"C1", "C12", "C10", "C1", "C6", "C22", "C1", "C6"}. I am trying to write a function to give me a list of duplicates: {"C1", "C6"} in the list. Each duplicate will be listed only once. The function I wrote does give me anything back at all. I can't figure out why. how to translate that syntax into VB.net since I am not up to speed on LINQ yet. It is here: How to get duplicate items from a list using LINQ?
''' <summary>
''' Given a List(Of String), returns a list of items that are duplicated in the list.
''' Each duplicate returned is unique.
[Code].....
I'm designing a web page with two dropdownlists, one for the Make of a car, the other for the Model, both bound to a database with separate SQLDataSources, and using a distinct statement. I add "All" at the top of both by setting appendDataBoundItems = true and adding items named all. Then when I fill the Make with a querystring all the model items get added twice (but only the databound items).
Here's my code:
<asp:DropDownList ID="DropDownMake" runat="server"
DataSourceID="SqlMakes" DataTextField="Make" DataValueField="Make"
AppendDataBoundItems="True" EnableViewState="False" AutoPostBack="True">
[Code].....
i am trying to load XML document and populate few checkboxlist. I use DataTextField as below.
[Code]...
when I load items in to a treeview, there's several items the same.Say it's like this:[code]How do I delete the duplicate items so it only shows subitem once?
View 7 RepliesI would.Error1The item "objDebugMerchGear.Form1.resources" was specified more than once in the "Resources" parameter. Duplicate items are not supported by the "Resources" parameter.MerchGear...How do i fix it.
View 1 RepliesI am trying to search through listview in VB.net 2008. It works fine with small list, but when the list is big ( around 25000 rows), if I search multiple items , it fails saying that index is not valid. Obviously what I understand is , it it tryiong to remove an index does not exist. But I am unable to figure out where exactly it is going wrong.
PS : while it is doing search through the entire listview, I am incrementing index = index+5 becasue I want the next 5 rows to be in the selection state as well.This is the code Private Sub TextBox1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox1.KeyUp If (e.KeyCode = Keys.PageDown) Then
[Code]...
So I have three listboxes, LB1 is an uploaded list, LB2 is a master list, and LB3 is generated from LB1 items that are NOT in LB2. I have a button that replaces the selected item from LB1 with the selected item from LB2, woot.Since LB3 is a subset of LB1, I want to be able to select the items from LB2 and LB3 and have it replace the item from LB1 but running into some trouble with finding the appropriate item without selecting it. [code]
highlight Fred from LB1 and Freddy from LB2, click and Fred becomes Freddy in LB1. I want this same change to happen but by selecting the "Fred" located in LB3 (If LB1 is hundreds of names long, I don't want to have to sift through it and only make the changes that need to be made). [code]
I have button that adds items to a list box and a button that removes it...the one that adds it works great but when i select an item to remove it doesn't remove it..i don't know if there's something wrong with the code or not..
Private Sub btn_Remove_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_Remove.Click
list_MyOrder.Items.RemoveAt(list_MyOrder.SelectedIndex)
prices(list_MyOrder.SelectedIndex) = 0
MsgBox("Select any item to remove")
End Sub
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 have a VB.NET project with XHEO licensing(to license a product) and for that I am using <projetname>.PLSK file which was added to the my solution. When I tried create a new .plsk instead of existing one I got a error while building. The error is like this.
"The item "objRelease<projectname>.plsk" was specified more than once in the "Resources" parameter. Duplicate items are not supported by the "Resources" parameter.
I am sure there is only one plsk file and when I tried to build with previous .plsk file got the same error. Where is that resource parameter are stored. How to delete that?
I have to extract from a text, group letters (2-by-2 characters), for example : from this string : "THIS IS SOME" => THHIISS IIS
View 32 RepliesI want to know to how to delete duplicate items in menubar?
View 6 RepliesI have a form with 2 listview's and I want to remove that items in the listview1 that area duplicated on the listview2.
View 8 RepliesI have a generic list that I'm removing items out of using List.Remove(Object). I have been removing items but whenever I get to the fifth item I'm removing it fails and does not remove it from the list. It doesn't seem to matter what I'm removing but everytime I try to remove five items it fails on the fifth item.
View 4 RepliesI 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] .....
If I have 3 times selected and when I click "submit" for example I want all my selected items to be removed, but when I try to do this only my first selected item is removed.
ListBox.Items.Remove(ListBox.SelectedItems)
How do I remove all 3 items from the list box at the same time?
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 RepliesSo, I am working on something which requires various session Data to be held. I need to be able to delete certain data from the session, but not clear the whole thing. Obviously, I can manually delete session items with
[Code]...
I'm wondering what the proper way to remove an item from an array is. The way i am doing it at the moment is:MyArray(0) = NothingIs this the best way to do it as i'm having problems with my programme and i think it may be something to do with this
View 10 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?