Counting Items In A List Box

Jul 6, 2009

I have created my list box, and can add things to it, now i would like to count the number of items in my list box, also the code that this is going to be the interface for has a maximum number of 20. How do i count numbers in a list box and also put a cap on the number of things that can be entered into the list box? Ps this forum is fantastic, i have learnt so much more today than all of last week!

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Counting Selected Items In A List Box

Apr 4, 2012

How do you count the amount of values in a list box that are selected, rather than all of those within the list box? I need to get the number and then make it a string. Once i have the number i can change this easily to a string

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Counting Checkboxlist Items Which Are Selected?

Aug 24, 2011

I want to be able to show on the form1, the count of the number of items selected in a list. So if I tick one the number goes up, if I tick it down, the number goes down.

Checkboxlist is lstTAGs

Do I have to create a function, which counts each selected item every time I click on an item?

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Counting How Many Items Checked In ListBox

Apr 13, 2009

Is it possible to count how many checked items there are in checkedlistbox and then display that number in a textbox?

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Counting Items In A Multidimensional Array?

Mar 4, 2011

If I have the following array:

Dim Array(4, 10) As String
Array(0, 0) = "100"
Array(0, 1) = "200"

[code]....

How do I get the following count:

0 = 2
1 = 4

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Counting Specific Items In One Dimensional Array

Feb 10, 2011

I have one dimensional array that is being returned by an NVP function, the problem is that I want to count the number of ID's returned by the array to set the limit. For instance the array comes in this format ID0, ID1, ID3.... IDn, Name0, Name1, ...., Namen, Surname0, surname1, ...., surnamen etc... I want to know the n+1 number of ID's so that I can set it as the upper limit of my array to be able to loop through without setting an arbitrary number.

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Counting The Number Of Items Under A Section In An Ini File?

Mar 27, 2012

I have a display system that I created in VS Studio 2005 that uses ini files for certain functions. Reading and writing to ini files is easy enough but what I just can't figure out is how to count the number of items under a particular ini section.

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Determine If Property Is Generic List<of T> Via Reflection And Loop List Items

Oct 1, 2009

I'm looping all the properties in an object via reflection:

For Each p As PropertyInfo In values.[GetType]().GetProperties()
If p.CanRead Then
'Do stuff
End If
Next

how to determine whether the property in question is a generic List(Of T)? If it is I need to loop the list itself.

I've experimented with GetType and TypeOf but have not managed to get anything working.

To clarify, I want to keep this generic. I do not want to specify the type of T, I need to loop the list items and call the ToString method on each item. T could be one of a number of different types (application specific reference types). Is it possible to do this without specifying types?

(VB.NET 2005 with .Net 2.0)

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Placing Selected/unselected Items In Checked List Box Into List Boxes?

Mar 16, 2011

This program is supposed to allow the user to check items in a checked list box. If the item is checked, it goes into the Completed List Box on the right. The program then adds the unchecked items to the Pending list box on the left. I keep getting placement values (e.g. O,1,2) instead of the strings (e.g. "Key Returned") in the list box results (see photo attached)

Public Class frmCheckOut
Dim i As Integer
Dim cleaning As String = "Cleaning Inspection"
Dim damage As String = "Damage Repaired"

[code].....

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Shuffling Items Inside A Movie List / Need To Delete Half List

May 16, 2011

Another program I am working on for fun, I am basically shuffling a list inside a listbox, what I want to do is delete the rest but not sure how to go through with that. At the moment I have this: [code] Just contains the code, declarations outside weren't included.So anyway, once clicked, it will call on the function to basically shuffle in a for loop, I was wondering if I should (or how should) create another function and call it in the click button or have just a loop in the click button so it deletes half the list. What I am doing is I have 20 list of items, I want the program to shuffle the items and then deleting the lower 10, meaning, if I had 10 items and wanted 5 top, I'd want: 0, 1, 2, 3, 4 and deleting 5, 6, 7, 8, 9.

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List.count While Adding Items To The List Increments Returns 0

Jul 20, 2011

I am attempting to read the results from a SQL query into a List(Of) and I can see the List.count while adding items to the List increments, however in another part of my code when I am attempting to read the List the List.Count returns 0. My List is as follows:

[Code]...

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Dynamically Generate List Items To An Unordered List In ASP.NET?

Nov 27, 2009

I have an error panel that is subbed in to a page if an error goes wrong to gracefully handle and display errors.Currently, I am just appending the error messages to a string and pushing that to a label. If you have multiple errors, this gets messy.I'd like to push each error to a list item in a bulleted, unordered list.How can I dynamically generate, from a vb codebehind file, new list items inside of an undordered list element?

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Finding Items In One List That Aren't In A Second List Using Linq

Jan 25, 2011

I have two generic lists, named ListA and ListB. Both ListA and ListB could potentially have duplicate items. What I would like to do is use LINQ to grab the items in ListB that are not in ListA, but I'm unsure how to do so.

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VS 2008 Search Item A (from A List Of X Items) In List B?

May 5, 2010

i want to search item A (from a list of X items) in list B but i want to get the item not found example Search ITEM A in LIST B if not found then return a print....if found continue with ITEM B..and so on.

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VS 2010 Return Items In A List Before Returning The List?

May 23, 2012

That was probably bad title, but I'll illustrate what I'm trying to do. I have a method in a class that I need to call several times. The method returns a List(Of String). I'm just grabbing some information from a database.

VB.NET
Public Function GetTestList() As List(Of String)
Dim int As Integer = 0

[code]....

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Comparing An Item In A List Against Other Items In The Same List In .NET?

May 30, 2011

I have a List(Of MyObj), and I want to iterate through that list and compare each element to all other elements in the same list, excluding (if possible) the same element. I have a solution that works, but it's slow and uses double For loops. It may possibly have also summoned Cthulhu from his sleep. This below is a sanitized version of what I have:

Dim MyList As New List(Of MyObj)({Obj1, Obj2, Obj3, Obj4, Obj5, Obj6})
If MyList.Count > 0 Then
For i = 0 To (MyList.Count - 1) Step 1

[code]....

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Getting List Of Items Not In Parent List Using LINQ

Mar 28, 2011

I am writing app in vb.net

I have two variables one with list of RoomRate and other with list of RoomTypes.

We have RoomRates and RoomTypes linked with RoomTypeInfo variable insite the RoomRate.

So how do i find the RoomTypes which donot have the RoomRates Defined.

My Sample Code:

class RoomType
property UIN as integer
property Title as string
end class

[Code]......

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How To Test 1st List Box If It Has Items More Than Other List Box But By One Item

Nov 15, 2011

I want to know how to test the 1st list box if it has items more than the other list box but by one item, here is what i have: If lstInvisibleTv. Items.Count > lstInvisiblePc.Items.Count Then it works good if the lstInvisibleTv list box is greater than the other list box by one but it also works if it is greater the other one by one or more which I do not want. I want it to work just by one.

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Program That Will Compare Array Of Grocery List Items Glist And Array Of Coupon Item List

May 27, 2012

I have a program that will compare an array of grocery list items glist and an array of coupon item clist.When I compare the two and if there is a match somewhere in the array I want to have a picturebox visible.When there is no match, I want the picture box not to be visible. [code] The code seems to work great until I come to the else statement.When the code finds a match it displays the picture box and the msgbox without error, but as soon as the message box is cleared, even though i've input it as an ELSE statement, the picturebox goes false again.Does anyone have any idea of how I can "hold" the picturebox to stay visible while the match between the arrays exists?

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Remove Items In One List From Another List?

May 2, 2012

i am writing a program that reads a excel report from accounting software with our weeks orders on... so basically the program reads a list of around 100 items which all works fine.I also have a database that holds info on each item, when the excel sheet is parsed the software checks to see if any new items have been added to the list that are not on the softwares database. this is where i am having the issue.I have two lists: ItemsOrdered & ExistsingItems.

All the items ordered this week are in ItemsOrdered and all the items not in the items in the database are in the ExistsingItems list. using these two lists how can i find items that are in ItemsOrdered but not in ExistsingItems.

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Remove Duplicate Items But Leave At Least One Of The Duplicate Items In The List?

Mar 27, 2012

I 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].....

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Add Items In List Box?

Mar 22, 2010

i have little problem

i want to add items to listBox when i press in combo

i was doing it like this in vb6.0

List1.AddItem Val(Eastern.Text) * East / 100, 0

now i want to know how to do this in vb 2005

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Tag Items In A List

May 20, 2010

I have a list (of lines) and i'm looping through them and identifying certain ones as edges; I would somehow like to tag these lines so that when i loop through the list again later, I know which ones i tagged. I hope i'm explaining this ok. if not, let me know. What's the best way to deal w/ this type situation?

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.net - How To Get Duplicate Items From A List

May 31, 2012

I 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].....

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Add 4 Items In A Row In A List Box, For Instance?

Jun 21, 2010

I've made a program that can add 4 items in a row in a list box, for instance

Item Make Guarentee qty Price
toy car rover 1 1 £45.00
monkey monkey 2 1 £65.00
total: £100.00

The problem is I can't get the price to total up in a lable or textbox, however,I can make it work if i seperate the box and make two, listbox1 for item,make,gtee, qty and listbox 2 for price only.I don't want this because i want the row to delete in one go instead of deleting it from two boxes which is a time taker. code below

[Code]...

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Add And Save Items To A List?

Feb 10, 2011

How can I add and save items to a List of Items in a listbox to an existing Text File in the bin folder? I'm already using IOStreamReader to pull information from the file, but I want the user to be able to add additional items (Name and Last name). Also, I'm having some issues organizing the list in the list box.How can I organize it pro pertly (2 columns)

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Add Items To A List Box From Sql Server

Jun 2, 2011

I have a text box which I search SQL server which returns to values based on the text I pass the SP and then I want to add to the list box items so here is my code below the DataTable contains the item I want to return in the list, I have used this syntax to populate a Datagrid with no problems.[code]

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Adding Items From List Box

Jan 28, 2010

I'm learning how to add items from a list box to a combo box. I'm trying to follow what's going on in the function loop and comparing a boolean and selected index. I can see that it's comparing the item chosen to each item already in the combo box to make sure that it's not already there. If function finds that it's not in the list it sends back that it is true that the item is not in the list.

It then continues to the statement that adds item to the list. The code for the double click event is working fine and items are getting added to combo box. However, the code for the add button isn't functional. I'm not seeing why it doesn't work? I coded out the original code, and replaced with something I thought might work but it still isn't functional. [Code]

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Adding Items To A List Box

Mar 9, 2009

[Code]...

Mod Edit: Please use code tags when posting your code. Code tags are used like so =>

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Assign A Value To Each Of The Items In The List Box?

Nov 19, 2009

I am creating a program with a few listboxes. And I want to assign a value to each of the items in the list box. Here are what my listboxes consist of and the values i want assigned to them.

Listbox1

Playstation Value is 100
Xbox Value is 90
WII Value is 80

[Code]....

I then want to take the values add them together and display them in a text box. So for example someone chooses playstation and call of duty that will be 130 and I want this to display in a textbox.

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