Looping With List(of Objects)
Oct 15, 2009
I have a procedure in VB.net using VS.net 2008 which will get the list of Orders and build a XML file with the list of Orders as shown in the code below: As the number of Orders is getting huge, I want to build the XML file for every 500 Orders
[Code]....
Instead of building XML for all the records I want to create XML for each 500 records. I tried the following code and it is throwing an error saying Expression is of type Orders which is not a collection type.
[Code]....
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Aug 31, 2011
I don't know if this is doable, maybe with Linq, but I have a List(Of MyType):
Public Class MyType
Property key As Char
Property description As String
End Class
And I want to create a Dictionary(Of Char, MyType) using the key field as the dictionary keys and the values in the List as the dictionary values, with something like:
New Dictionary(Of Char, MyType)(??)
Even if this is doable, internally it will loop through all the List items, I guess?
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Feb 5, 2011
I have some code that I want to apply to many objects (Pictre Boxes) and I was unable to loop through the objects via a For loop and am currently forced to copy paste the code for each Image Box.
The Pictre Boxes are named compAlien1, compAlien2 ... compAlien9
Is there a way to do something similar to this:
For i = 1 To 10 Step 1
compAlien[i]... #code#
Next i
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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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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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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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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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Jul 26, 2011
I am trying something new. I now how to loop through items in a list box but this is where I am stuck. I am looking to loop through my list box and send a email to each email within my list box.I am unsure if I am using the right loop or not. I am using a for loop. Here is what I have so far in code:
Dim smtpserver As New SmtpClient
Dim mail As New MailMessage
smtpserver.Credentials = New Net.NetworkCredential(txtUsername.Text, txtPassword.Text)
[code].....
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Jun 27, 2012
I am looping through a list for a spellchecker in vb.net (using vs 2010). I want to go through a wrongly spelled word list. Each time the code picks the index that's one higher than the index of the last checked word.
In my version of notquiteVB/Pythonese I think it would translate something like:
(start loop)
dim i as Integer = 0
dim word as String
[Code]....
But this doesn't work at all...when it gets to the last item in the list and reaches 'word = ' it throws the error of 'out of range -- must be less than the size of the collection'.
How do you get the last item in a list? Maybe lists aren't what VB uses for this kind of thing?
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Nov 15, 2009
I'm making a card game and I want to try and design my own card deck.
Dim X As Integer
Dim currentCard As Integer, currentCard2 As Integer
Dim RandomNumbers As New Random()
Dim NumberofCards As Integer
[code]....
I started a basic vb.net class for my fall semester of high school, and although I've learned a lot, my goal since the start of the semester has been to do this. I realize there are simpler way of assigning card values than writing 52 if then statements, but I'm planning on doing other things with the statements. As you can see, my main plan of action is to generate a random number for each card, loop through the array list to make sure the random number representing that card hasn't been assigned before, use the value to select the card, and then add the randomly selected number to the array list so it won't be used again (non-repeating random numbers).
1) I'm trying to represent all the numbers with Numberlist.Item(X) and that doesn't work because either a) x represents any one number or b) x always represents only 0, which means it only checks the first number.
2) I think I've read something about using this method for generating random numbers in a loop, that it doesn't work for some reason.
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Apr 30, 2010
I want my loop to loop until it reaches the last string in my generic list. I know I could simply insert the last index of the list as an integer but I want to be able to use this if my list grows too. How could I achieve this?
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Jun 22, 2010
I am trying to move through a list "TodaysCard" and print the TimeOfDay.ToString into the first column of every row and to only create the amount of rows that are needed. But am a bit of a novice when it comes to this and can only get it to display the TimeOfDay.ToString value for the first item in the list over and over again. Just wondering how I can get it to iterate through each item properly.
For Each Race In TodaysCard
With (Race)
Try
[Code].....
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Apr 12, 2009
How can I find a List or Collection of User Controls available within the development enviroment and dynamically add them to a combox by their Name Property. I am looking for something along the lines of:
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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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Feb 10, 2012
I save the client data into an array list. How to find part of data(currentIP) inside the array list(clientList) with fast method? [code]
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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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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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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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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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Oct 7, 2011
The scenario is this, I have several variables that are set as a list(of objects). The values for these lists are populated during code via a SQL query. I want to be able to take these values and then use them within another SQL query. Each time the program runs the values will be different and there will be more or less within the list.
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Aug 14, 2009
I have a superclass NetworkTest and 3 derived classes PingTest, Pop3Test, SMTPTest. I want to create a big list of all the tests, like this:
[Code]...
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Mar 9, 2010
I have started using BindingList(Of T) for my generic collections whenever I need the objects to interface with the GUI instead of List(Of T). This has worked well for me so far but a few of my collections are stored in Dictionary(Of TKey, TValue) and there doesn't appear to be a corresponding BindingDictionary(Of T).
Has anyone else come across the necessity to use this, and how did they achieve it? Should I implement this myself? (How?) or is there a better solution already available?
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Apr 21, 2010
Why I couldn't have a separate list of objects of the same class?
This one works,
Dim list As New List(Of Address)
list.Add(New Address With { _
.Country = "USA", _
[Code]......
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Mar 16, 2012
Suppose I have:
Public Class myClass1
Dim foo As String
Dim bar As String
[code].....
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Dec 7, 2011
I have a VB 2010 class like
Public Class cStar
Public Name As String
Public Magnitude As Single
End Class
I want to add stars into some doubly linked collection or list that is ordered by magnitude.
I tried to create my own list cList based on collection
Class cList Inherits collection error - collection not inheritable End class
I had hoped to enable things like
Dim Star1 as cStar
Dim Star2 as cStar
cList.AddFirst(Star1)
cList.AddLast(Star1)
Star2 = cList.Behead
[Code]...
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Jun 8, 2009
I am a .net programmer vb & c# but i can't seem to figure out how to get my objects into a list or array in php. var mylist = new List<myobject>();
mylist.add(myobject1);
mylist.add(myobject2);
what i have tried. Products being a property for a collection of orderitems
$this->Products = getOrderItems();
public function getOrderItems()
{
$items = array();
[Code]...
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Mar 29, 2010
I have to ask my first question at some point, so here she goes.I am trying to create a dynamic list of objects. The objects will have several types (String, Integer) associated with them. Currently I am forming a Collection as I instantiate new objects.Is there a prefered to map this collection to, say, a Datagridview? Will I have to Iterate through the collection and add the rows at each iteration?Would I be better served using an ArrayList or something else over a Collection?
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Jul 18, 2010
I am implementing IDisposable for a class and while disposing there is a internal list of disposable objects. Should I be disposing those object by looping through them.
public Class MyDisposable
Implements IDisposable
private _disposbaleObjects as new List(of OtherDisposables)
[Code].....
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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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Mar 1, 2011
I have list object and I need to check id in a comma separated string using LINQ in VB.NET, something like this:
dim strId as String = "1,2,3,5,"
dim myList = from objmylist where objmylist.id in (strId)
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