Finding A Particular Item In A List Of Objects

Jul 5, 2011

I have a question about locating a particular object in a generic list. I have 2 lists, one contains a list of every song in a library and the other contains only copies of some the those elements that are added to a playlist. How would I locate and change a value of an particular item in a list by comparing one of their variables such as name? Or find it's index in the masterlist.

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Finding Maximum Value In A List Item?

Jan 23, 2012

I feel there must be a single line, more elegant way to find the highest page number in my list of report pages. The code below works fine but seems verbose. Is there a better way?

Dim numofpages As Integer = 0
For Each reportrow In reportlist
If reportrow.reportpage > numofpages Then numofpages = reportrow.reportpage

[code].....

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Forms :: Objects - Cycle Through A Arraylist And For Each Item In That List

May 15, 2009

I want to cycle through a arraylist and for each item in that list I need to create a picturebox, label1, label2 each with specific name attributes

[Code]...

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Possible To Make List Box Item Height For Item Depending On Amount Of Lines That Item Contains?

Jan 1, 2012

I have a list box on the form which functions as a copy/paste. When you copy something, it is automatically added to the list box as a "clipboard helper". Here is the problem,however: if the text is more than 1 line, the list box does not show all the text.It ends up looking messy.So getting back to my question, is it possible to make the list box item height for an item depending on the amount of lines that item contains?This is a one line sentence in the list box and should take up one line.This is a multi line sentence in the list box and should take up two lines for item height.

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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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Create List Of Child Objects From List Of Parent Object?

Jun 2, 2011

I would like to create list of child objects from list of parent object. Like If i have list of bookingroom which has one member room then i would like to create list of room from it.

eg. code:

Dim BookingRoomList As List(Of BookingRoom) = New List(Of BookingRoom)
Dim RoomList As List(Of Room) = New List(Of Room)
BookingRoomList = BookingRooms.FillGrid()

[Code]....

Is there any short cut method instead of iterating over for earch?

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VS 2005 Sort List Of Objects By Child List Order?

Jul 20, 2011

I'm having a bit of a 'brain doner' moment here

I have a list of Objects. Each of these Objects contains a list of other Objects (pseudo code) :-

Private Structure Object1
dim Name as string
dim ListOfObject2 as List(Of Object2)

[Code]....

I need to sort the list of Object1 by the Value in Object2. I have a comparison class which sorts Object2 by its Value nicely.

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.net - Searching A List Of Objects In An Object List Using Linq?

Dec 22, 2010

I have 2 classes

Public Class Shipper
Public Property ShipperID As Long
Public Property CreateDate As DateTime

[Code].....

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Linq - Create A List Of Integers From A List Of Objects?

Nov 23, 2011

I'm trying to create a list of days(integer) from a list of dates(date).

I tryed to do this....

[Code]...

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Get Selected Item Index Or A Sorted & Grouped List Relative To Item Source?

Feb 12, 2011

I'm having some difficulty with a sorted & grouped listbox in WPF vb.net 3.5 that has an items source bound to an ObservableCollection.

What I want to be able to do is to retrieve a piece of data from the ObservableCollection items source depending on what item in the listbox the user has selected.I've almost got it working but because the listbox is sorted it does not match the index of the items source.

[code]...

As I previously mentioned, because the lstBox is sorted and also grouped the index's don't match up.Does anyone know how I can get the correct information I want from the List Source depending on the selected item in the list box?

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Select An Item From A List Box And Click A Button And Have That Item Go Into Another Listbox With It's Price

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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VS 2008 Finding The Index Of An Item In A Bound Checklistbox?

Nov 19, 2010

I have a checkedlistbox to which a dataview is set as its datasourceI also have a string array that contains valuemembers which need to be matched to the items in the checkedlistbox, of which if complying the checked state needs to be se

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Add To A Combobox A List Of Item (not Every Item) In A Txt Located On A Server

Feb 13, 2011

my program downloads into a combobox every item(line) that is in a text file located on a server.
Every line in the text file ends with "a)" or with "g)".

Now I just want to make 3 radio buttons:

- one that will allow the download in the combobox only the item ending with "g)"
- one that will allow the download in the combobox only the item ending with "a)"
- one that will allow the download in the combobox of both (I already know how to do).

How can I do so?

To download the entire list in the combobox I do:

Dim List As String = client.DownloadString("http://mywebsite.com/mytextfile.txt)Dim lines As String() = List.Split(New String() {ControlChars.CrLf}, StringSplitOptions.RemoveEmptyEntries)ComboBox1.Items.Clear()
ComboBox1.Items.AddRange(lines)

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Multithreading - Create Custom Objects/list Of Custom Objects In .NET?

Jan 24, 2010

I need two seperate lists, which every item is Integer, String, Bitmap - and one which every item is Integer, String String. However I don't know how to do this, or even where to look - I've googled for custom objects and custom object lists. What I'm trying to do is this.Custom Object1 is Integer, String, Bitmap Custom Object2 is Integer, String, String

In one thread I'll be adding items to List1(Of Object1), and processing them, and adding the results to List2(Of Object2), however I need to be able from other threads to look at the list and say only give me the items where Integer = (my thread ID), is this possible? Any help, or even links to information that would be relevant to this request would be helpful?

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Delete Item From List Box Select Next Available Item?

May 14, 2012

how whould I go about deleteing an item from a listbox and it will select the next available item.you know like the treeview control selects the next node if you delete one.

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Finding Value In Drop Down List?

May 31, 2012

I am trying to compare a calculated date with a value in a dropdown list. The value is a date.toString.This is what I have so far:

Dim sched = scheduleDateVal.toString("d"
If Holidays.Items.Contains(New ListItem(sched.ToString("d"))) Then
ScheduleDate.Text = scheduleDateVal.AddDays(1).toString("d")
End If

Holidays is a dropdown list bound to a database so that I can add a day to a scheduledate if it happens to fall on a holiday. This works if I add a string value to sched rather than converting scheduledateval to a string.

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Get Type Of Derived Generic List Class From List Item Method?

Mar 23, 2011

Public Class notifierMain
Public Class Contacts
Inherits List(Of row)
Public Sub New()

[code]....

When I debug this winforms application I get curType = "notifier.notifierMain+Contacts+row" I want to the Validate function to know it is in MyContacts. How do I do this?

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Finding Average Of Numbers In A List Box's?

May 4, 2010

Need to calculate Average Plan Duration for the 3 Shipment TypesSo far i haveQuote:

'CALCULATING AVERAGE DURATION FOR STANDARD
Dim iAverage As Integer
Dim iAvgDuration As Integer

[code]....

I uses the information from the list boxes, (lbShipmentDuration) and (lbShipmentMethod) to calcualte the average Duration for each Shipment Type.

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Finding Length Of Linked List

Mar 30, 2009

so i have a linked list of employee objects. I now need to iterate through the linked list to see if i can find a matching object. I could iterate though using the [code] What i'm not sure of is how i get the employees[x].EMID out to check it

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Lambda - Find Item In Array Of Objects .NET?

Dec 19, 2010

I'm making a function that searchs an array of Customers and returns a Customer object by a given ID.
I'm trying to do so with Lambda Expressions,and this is what I have so far:

Public Shared Function FindCustomer(ByVal ID As Integer) As cCustomer

Dim customer as New cCustomer = _ _
Array.Find(arrCustomers, Function(c as cCustomer) c.ID = ID)
Return customer
End Function

[Code]...

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Drop Down List Box (stop Selecting Item From List)

Jun 18, 2009

i want to stop accepting form drop down listbox if certrain criteria is not met [code]how i can cancel the selection of drop down list?

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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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.net - List.Contains Based On A Property Of A List Item?

Jan 11, 2011

I have a List myList of MyObjects. Is it possible to check if myList contains a particular myObject based on a property of myObject in VB.NET? In C#, you'd something similar to this right:

myList.Exists(myObject => myObject.property1 == 3)

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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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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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Display A List (Of Object) Which Has Single Objects And Child List (Of Object)?

Sep 6, 2011

Limited to using v2.0 of .Net framework (we use VB.net) due to environmental constraints on our servers.I've got an ASP.net webpage which pulls data from a webservice that performs checks on user accounts in active directory. Operators can check multiple accounts at one time using the web interface. The webservice returns a list(of AccountCheck) objects which themselves contain single properties like username, email address, and List(of AccountError) objects which contain multiple properties.[code]What I want to do is using some kind of repeater, create multiple panels or divs which contain labels showing the username, email etc, and a gridview which has the accounterror list bound to it to show all the errors. The users could be checking 2, 5, 7 accounts at once, and is dynamic.

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VS 2008 - Finding Highest / Smallest Number From List Of Values

May 10, 2011

Create a program where the user can find the highest number and the smallest number from a list of values It needs to operate as follows: Enter a value (number) in the TextBox and click on a button [Add to list]. Once this is done, the program analyzes if the number is the highest entered or the smallest. To view which is the smallest and largest, a second button [highest and lowest] will populate fields (texboxes) with highest and lowest numbers. I've attached an image of what the program should look like.

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Adding To A List Of Objects

Nov 9, 2011

I have an Object structured as follows:[code]I thought this would work but I keep getting the following error: Object reference not set to an instance of an object.

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Get List Of String From Objects?

Aug 26, 2011

I was wondering how I could go about getting a list of string from a list of objects, while removing duplicates[code]....

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Intersecting List Objects?

Dec 18, 2009

just needed to get my head round something. Say I have a class 'myClass' with properties ID and Name. Now say I have 2 lists of objects of this type as follows:

Dim list1 as List(of myClass) = GetList1()
Dim list2 as List(of myClass) = GetList2()

What I want is to 'intersect' (this may not be the right word!) the two sets of data by the Name property, but bring back the ID property from list1. A suitable database analogy would be if list1 and list2 were tables, I'd want to do a left join from list1 to list2 on the Name field.

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