Code Sorting An Object Within Arraylist ?
Oct 12, 2009Class Murid
Implements IComparable
Public strNama, strKelas As String[code].....
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Sorting Objects In Arraylist By One Of The Object's Properties?
Aug 30, 2011I have a group of objects stored in an arraylist. These custom type objects have a number of properties from their underlying class . I want to use one of the properties to sort the array. I cannot determine which Array.Sort method to use.
I want to sort based on an integer property. Virtually every example I can find involves sorting strings.
So, assume the Objects have the following properties.
Obj.name as string
Obj.ID as integer
Obj.Alive as boolean
The objects are kept in an arraylist called FriendsOfMine.
I want to be able to order the list by Obj.ID, both ascending and descending in value.
Sorting A List Based On An ArrayList Within A Custom Object
May 24, 2010I am using a list to keep track of a number of custom Row objects as follows:
Public Rows As List(Of Row)()
Row has 2 properties, Key (a String) and Cells (an ArrayList).
I need to be able to sort each Row within Rows based on a developer defined index of the Cells ArrayList.
So for example based on the following Rows
Row1.Cells = ("b", "12")
Row2.Cells = ("a", "23")
Rows.Sort(0) would result in Row2 being first in the Rows list. What would be the best way of going about implementing this?
ArrayList Sorting From Z To A (Descending Order)
Apr 13, 2010Code:
Dim list As New ArrayList()
For Each item As String In l_input.Items
list.Add(item)
Next
list.Sort()
Ok this sort the list from A to Z alphabetical order but how do you sort in from Z to A, i.e. descending order. Summat to do with the comparer? I have no idea how to use the comparer. Or is there an easier way?
Sorting/Splitting String In ArrayList?
Aug 20, 2010Basically, Im running an SQL query to the database, which obviously returns data in their fields. What I want to do is add each record into an ArrayList and split the string based on fields. I.E
CustomerID,Surname,GivenName etc
How do I go about this? so far I have:
alstData.AddRange(sLine.Split(","c))
sLine = the record from the database.
This doesnt seem to work, it just display's the data in one line with no split such as 20205SmithJohn?
VS 2008 - Error With Arraylist In My.Settings - Object Reference Not Set To An Instance Of An Object
Mar 14, 2010The issue is when I try to add a new item to the ArrayList with the following code, it gives me an error:
vb Private Sub btnLabelAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLabelAdd.Click
Dim result As String = InputBox("New Filter Label:", "Label List")
[CODE]................
Object reference not set to an instance of an object.
I'm not really sure what I'm supposed to be doing with this. It's a new setting I just added and it's empty, so I'm not sure if that has anything to do with it or not. Anyone know what's going on and what needs to be done to get it to accept a value and not want to be "initialized"?
Have Multiple Threads Run Through An Arraylist Of Object And Process Each Object?
Apr 30, 2009I am trying to have multiple threads run through an arraylist of object and process each object. My problem is that each thread processes every object in the array.So they are not working together on the job. I made sample application to show my problem. I think the problem is somewhere in my ThreadSub() Here is the
Imports System.Threading
Public Class Form1
Dim myitems As New ArrayList
[code]....
Add Object To Arraylist?
Oct 11, 2011I'm having some trouble adding an object to an arraylist.
Basically the object has two properties (file id/name), but I can't figure out how to assign those properties. During runtime it errors out with public member on the object not found.
Private QueueList As New ArrayList
Public Sub Queue(ByVal FileName As String, ByVal FileID As Integer)
Dim QueueObj As New Object
[Code]....
I'd also like to know how I can do a loop on the arraylist and access the two properites on each record.
ArrayList : How To Search A Object
Dec 7, 2009I have a arraylist with objects from a Product class. This class as properties like Name, Price, ID ...The ID property is a unique identifier for each object.how to search the object with ID=100
View 3 RepliesConvert An ArrayList To An Object?
Dec 19, 2011how to convert an ArrayList to an Object.
If I have the following:
Dim errorArray() As Object
Dim errorList As ArrayList
How do I convert errorList to errorArray() in VB.Net?
Adding Custom Object To ArrayList At Runtime?
Jan 5, 2010I am having issues adding a custom object to an arraylist at runtime.
Details of what Im trying to achieve.
My object is Fixture which represents a light. My light has the following properties:
Name, isMover, HighlightValue, UserNumber, Channels.
Channels is a dynamic arraylist which lists all the different channels of the fixture. A channel could be the lights colour or its intensity. A channel has the following properties:
Type, FeatureGroup, Value, Universe, Address, Slots and Offset.
Slots is the same again, breaking down to another ArrayList with more details.
Code:
Private Sub Patchingtest()
Dim TestFixture As New Fixture_Structure
Dim Intensity As New Channel
[Code].....
ArrayList Returns Boolean Instead Of PictureBox Object
Jul 20, 2011VB
Dim pic2 As PictureBox
pic2 = snake.Item(0)
[Code].....
InvalidCastException was unhandled
Unable to cast object of type "System.Boolean' to type 'System.Windows.Forms.PictureBox'.
Creating Arraylist Name/object That Auto Increments By One
Oct 4, 2010I want to create hypothetically infinite array lists each that can hold hypothetically infinite items. The name of the array list is "arraycalc". How can I perform a procedure that will create a new array list called "arraycalc1"... the next time after that the procedure is run and a new array list called "arraycalc2"...and so on and so forth.
View 6 RepliesHow To Retrieve Object From ArrayList Using Item Property
Jul 28, 2011I am using the following code to load an ArrayList with an object. [code]I don't know how to retrieve the object from the ArrayList using the Item property. I am using the following withOUT Success. The code is searching the arraylist for a match on serial number. Values(2) is correct and is working fine - the problem is purely getting the object information from the arraylist.[code]How do I pull the propertys back from the object in the arraylist to compare the values with Values(2)?
View 2 RepliesXML Serialization Arraylist With Multiple Object Types?
Feb 10, 2010My quest is in regards to xml serialization. I need to get rid of the root node of a collection. I don't have access to my source now so I'll just try to generalize
public class SomeClass
'...some other properties...
<XMLArray(isnullable:=true), _
<XMLArrayitem(datatype:=(getType(object1)), _
[code]....
Office Automation :: Print An Attribute Of The Object For The Arraylist?
Oct 15, 2009I am writing some code to bring in an arraylist. I want to print an attribute of the object for the arraylist (see red below). I cannot conclude how to get at it.
Code:
Public Sub drilldown1(ByVal DOC As IPDMWDocument)
' Drill-down levels from top level document
Dim f As String = "drilldown1"
Query Database With Each Object In Arraylist And Databind To Gridview?
Apr 21, 2011I have a function that returns a list of account numbers as an Arraylist. I am trying to use each account as a command parameter in another sub routine to get more data about each account number. This only returns the data for the last account number in the arraylist. I need to use each account number, call the database, get the additional information and store ALL of the data into a Gridview (databind). Example: If I had 3 account numbers in my arraylist return 3 rows of data to the gridview. I am struggling with how to get ALL of the information for each value (account number) in the Arraylist. Can someone point me in the right direction?? I think this can be done but I am not certain if my approach is correct or not. Perhaps I need to create datatables that contain the additional information for each value passed via the arraylist.
Private Function ReturnMultAccts(ByVal strAcct) As ArrayList
Dim acctsDetail As New ArrayList
Dim dsn As String = Configurati
[code].....
Sorting Columns In A Listview Object?
Jun 22, 2009First off i just want to take a bow to all the vb gods out there..I am trying to implement the sorting class form article 319399 in the knowledge base [URl]..on step number 6 it says to "Paste the following code into the ColumnClick event for the ListView:"so i created a sub to handle the ColumnClick event
[Code]...
Vb.net - Sorting A List Of <Object> With VB And LINQ
Mar 1, 2012I'm trying out some LINQ expressions and can't get them to work with the List class. Basically I want to be able to sort a list of custom objects by property type, however the C# LINQ syntax is KILLING me and I can't figure out how to convert it to VB
Class Foo
Sub New(Name As String, Position As Integer)
Me.Name = Name
[code]....
One Routine To Handle Multiple Events In Arraylist Class Object
Oct 17, 2011I want to use One routine to handle multiple events & i want to give the list class object to the routine handle clause in vb.net. Is it possible? I have 100 buttons on my web page & i want to handle click event of each button. I have same coding on each button but the only difference is that, which button is calling the event handling routine. So i want to make one sub routine for handling event of all my buttons.
I can solve this by writing each button name in the handles clause like - Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ImgRCP_26.Click, ImgRCP_27.Click,. But it is so lengthy procedure. So that why i want to handle my button in the arraylist. How to do this?
Sorting A Dataview Object Based On A Column Number?
May 10, 2011I have a dataview object that is being populated by database fields - so I can sort on these partulular columns by specifying the actual column names without any difficulty. However, I have been asked to add a few more columns to the dataview, and these columns will be calculated columns, not directly derived from an underlying database column.The users want to be able to sort on these new columns as well - even though there is no actual column name I can use to sort.
I have not been able to see where I can sort a dataview based on the actual column integer value used when the user clicks the appropriate heading to sort.
Best Code For Performance To Check If A .net Arraylist Have Two Or More Items With Same Value?
Mar 23, 2012I don't want check if an item with a value exists in the arraylist,I want to know the best code for performance to get how many occurrences of the same item with the same value exists in an arraylist.
View 2 RepliesCode Does Not Replace The Word In Each Arraylist As A Reference?
Dec 9, 2011I am puzzled as to why this following code does not replace the word in each arraylist as a reference.
Dim AllMyWords As New ArrayList
AllMyWords.Add("hello")
AllMyWords.Add("how")[code]....
I would have assumed the FOR EACH bla IN BLA works like a reference but it seems like it does not.
Vs2008 Sorting The Code Window?
May 14, 2009Is there a way to sort automatically the code window so the procedures for each control in a form appear one after the other (also for the control names)?
View 1 RepliesCopy The List Of Principal User To Arraylist To Use Arraylist.indexof?
Dec 1, 2011What I am doing is iterating through all the groups that belong to the top group (Generic reports). Then I take advantage of the GroupPrincipal.GetMembers(True) which will recurse through a given group name. I test to see if the user exits under that group and if true I put the group name in an arraylist.
I use the for each principal in GroupPrincipal.GetMembers to loop through each returned user to see if they exist.
Is there a way to put all the returned users Principal.Name from a given group in GroupPrincipal.GetMembers into an ArrayList? This would allow me to to use Arraylist1.IndexOf to search for user. Which would be much faster then iterating through a returned list using the for each construct.
Sub RetAllMbrs(strUser As String)
Dim oPC As PrincipalContext = GetPrincipalContext() '<- this is function somewhere else in the code
[Code].....
VS 2010 Threading & ArrayList - Use Adding A String To ArrayList In Tread?
Jan 11, 2012I have a problem in Treading.I have a code like this;[code].....
I want to change ListBox1 with ArrayList. But I couldn't find how to use adding a string to ArrayList in tread.
Sorting Listview Items Mess Upp Code
Oct 27, 2008I have a listview with items. I have a sorting class to do it. However when something is changeing my Listview control.
There are 3 colums. All items for each column exists in an struct with 3 items, one for each column. I have checked that I have all data in the array. But when I loop trough array of items and add then to the Listview, then many items in column 2 and 3 is not showing up.... This happens only after I have used the sorting class.[code...]
Question If ArrayList Contains String Remove It From New ArrayList
May 6, 2010I have an arraylist (arrFirstArry) which I use to populate another arraylist (arrNoDuplicates) preventing any duplicates from being added. This works fine. What I would also like my code to do is prevent adding any partial values which may exist from being added. i.e. my array is like this
[Code]...
Struct - .net 2003 Arraylist Of Structure Which Have An Arraylist?
Sep 22, 2011I have two structures Public Structure myResearchData
Public batchName As String
Public arraylistRData As ArrayList
End Structure
Public Structure myResearchSubData
Public researchDescription As String
[Code]...
Cleared MyResearchData.arraylistRData for new data to be put in but it also clears the arraylist inside MyResearchDataAList and didn't old the contents of the arraylist
VS 2008 - Reading ArrayList In My.Settings And Add Another ArrayList To It
Sep 21, 2010What I need to do is read an ArrayList in My.Settings and add another ArrayList to it. The first think I'm trying to do is load My.Settings.Records into myArrayList. I'm not quite sure on the proper way to do this. I've tried things such as Dim myArrayList As ArrayList = My.Settings.Records, I'm not sure if I need New and I'm not sure if I need .Clone or .CopyTo.
Then I have another ArrayList myArrayList2. To get this into myArrayList I've done: [Code] Then to save it back to My.Settings I've done. My.Settings.Records = myArrayList. The problem is I keep on getting Object reference not set to an instance of an object error on the AddRange line. My.Settings.Records is definitely an ArrayList and it will sometimes = Nothing. The objects will only ever be strings.