I 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.
I 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]...
I'm wondering if this is possible, I want to be able to call functions from within the program itself by means of an ArrayList? I want to be able to do something such as:
FunctionsList.Add(SomeFunction)
FunctionsList.Add(SomeSub)
For Each Function in FunctionsList
Call Function
Next
Would this be possible? It's important for a project I am working on.
i am trying to add items to a Listbox, but first i need to know if the item is already in ListBox. I know how to compare the selected item in a combo with the arraylist. I use this
If Indicadoreslist.Contains(Me.ComboBox2.SelectedValue) Then
MsgBox("It exists")
Else...
[code].....
What 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].....
I 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
What 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.
Speed is critical in my application. As of now, I'm using an ArrayList to store a list of Strings and I use BinarySearch functionality of ArrayLists to search for an item. Would I be able to do this faster using String Collection and a for loop?
View 22 Repliesi am a student i have an assignment in a class in which i am totally lost PLEASE HELP
1) Code the necessary instructions for the ADD button which is instantiating an object and adding to a collectioni
2) Code the necessary instrutions for the DEL button
3) Code the rest of the SAVE button to allow us to continue to edit and save the customers.[code]
Public Class BasicInformation
Public maleFirstNames As New ArrayList
Public maleFirstNames.Add("John")
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
I want to declare a set of arraylists and the base values so that they are available throughout the entire program. When I set the declaration for the array list as public and attempt to add a value to the array the add.("john")is underlined in blue and it says end of statement is expected.
I'm trying to do is take each item from an arraylist, that is populated through a structure read from textfiles, then loop through them adding each result from the arraylist to a new line in a textbox. What I'm getting is that it's adding only the last item to the textbox rather than listing them, yes I have multiline set to true. Because of the potential size of the arraylist I have it running in a background worker. Once it's complete then I'm trying to populate the textbox. All the code is working fine to that point it's just populating the textbox correctly is my problem.[code]I've tried adding vbnewline, vbcrlf, cblf at the end of the statement as well as placing the text statement in both the runworkercompleted sub as well as in the delegate with the same result.
View 5 RepliesI 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].....
I have a function which iterates through the TextBoxes in my form (and its child controls) and adds each TextBox's name and text to an ArrayList using a structure I called valTxtBox.
Here's a snippet of the
VB.NET
Public Structure valTxtBox
Public nome As String
Public texto As String
End Structure
[Code] .....
Now, the problem is that if I call Clear() for valsTxtBox in the getctrls() function, not all the elements get added to the ArrayList. However, if I don't call Clear() it works just fine. BTW, I'm using VS2008 express which might be relevant.
I am trying to add values from Arraylist to particular column of grid view.
As:
If (Arr_NewContacts.Count > 0) Then
dgvStayout.Rows.Clear() ' **GETTING ERROR HERE**
dgvStayout.Rows.Insert(0, (Arr_NewContacts.Count - 1))
For i As Integer = 0 To Arr_NewContacts.Count - 1
dgvStayout.Rows(i).Cells("Name").Value = Arr_NewContacts(i).ToString
[Code] ......
Datagrid property like AllowUserToAddRows and AllowUserToDeleteRows is already set to true.I am using above code on lost focus event of one of text box.
I found that if using ArrayList, all clone/CopyTo/Add command are shadow copy, not separate copy. How can I do such that after an ArrayList A is "copied" to ArrayList B, change in ArrayList A will not reflect to ArrayList B?
View 1 RepliesI want to create an array of an array (or arraylist of an arraylist) to hold strings.I want to fill an array1 with string values Then add this array to array2. - but only taking up 1 row in array2 e.g something like array2(index)=array1 Then clear array1 then loop through this again with different data, and add it to the array2.so will end up with something like
array2(0)... contains a collection of array1 data
array2(1)... contains a collection of different array1 data
.. and so on
i think i need to make new instances of array1 each loop, but not sure.I dont mind if it uses arrays, or arraylists, or lists, or structure of arrayslists?
s there a difference between the arraylist in visual basic and arraylist in C#? I had to convert some C# code to VB and there is a call I make in a third party api that requires me to pass in an arraylist. When I do this in C# it works just fine, but when I do this in VB, I just get back a vaque exception from the api.
[Code]...
The exception I get is very vague and comes from the API. All i get is, "ARException Occured".
How could I declare an arraylist as strong typed arraylist of Strings I have tried this code
Dim newAr As ArrayList(Of String)
i am try to get the items i add to an arraylist (DHHNoneSystemMerger) back to string but with the code i have below i get the out "System.Collections.ArrayList" instead of the items that i added. My Code:
Module WorkingWithTheFiles
Public DHHNoneSystemMerger As New ArrayList
Public DHHSystemMerger As New ArrayList
[Code].....
I'm trying to use an arraylist as the parameter to String.Format.
msg = msg & String.Format("<td>{0}</td>" & _
"<td>{1}</td>" & _
"<td>{2}</td>" & _ [code].....
But this code throws a FormatException
Index (zero based) must be greater than or equal to zero and less than the size of the argument list.Am I wrong that it's possible to use an arraylist?
I have an ArrayList, and i wish to search it for a specific part of a string. Like the InStr() function.I can only find the WHOLE string. The ArrayList has strings like "This=Is A String", so if i do a check with ArrayList.Contains. It will only search for the whole string, and not something IN the string. Perhaps i need something like Starts With .
Code:
dim wordArr as New ArrayList
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If wordArr.Contains(TextBox1.Text) Then
[code]....
my problem is in subject can u please give me a easy way to do it?
View 5 RepliesI want to get value from datatable and then store it to the string() arraylist. datatable contain 3 column (columnA | columnB | columnC). I want to get all value from columnB and store it to arraylist.
I have try something like this
If myTableData.Rows.Count > 0 Then
For i As Integer = 0 To myTableData.Rows.Count - 1
Dim value() As String = myTableData.Rows(i)(1)
[Code]....
Basically, 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?
How do I convert an arraylist into a string of comma delimited values in vb.net. I have an arraylist with ID values
arr(0)=1
arr(1)=2
arr(2)=3
I want to convert it into a string
Dim str as string=""
str="1,2,3"
I've got some code that creates a list of AD groups that the user is a member of, with the intention of saying 'if user is a member of GroupX then allow admin access, if not allow basic access'.
I was using a StringCollection to store this list of Groups, and intended to use the Contains method to test for membership of my admin group, but the problem is that this method only compares the full string - but my AD groups values are formatted as cn=GroupX, etc....
I want to be easily able to determine if a particular substring (i.e. 'GroupX') appears in the list of groups. I could always iterate through the groups check each for a substring representing my AD group name, but I'm more interested in finding out if there is a 'better' way.
Clearly there are a number of repositories for the list of Groups, and it appears that Generics (List(Of String)) are more commonly preferred (which I may well implement anyway) but there is no in-built means of checking for a substring using this method either.
I've settled on using a List(Of), and I've borrowed from Dan's code to iterate through the list.
I 've an ArrayList and to join all its elements with a separator in one string I m using...
Dim s As String = String.Join(",", TryCast(myArrayList.ToArray(GetType(String)), String()))
however, I would know if there is a smarter/shorter method to get the same result,or same code that looks better...
Add an ArrayList To Threaded Listbox i have been working on this for ages and cant get it to work. here is what i have so far... this gets dup sub to work in new thread when i click button2 the dup sub will filter through Listbox2 items and sort through the listbox and if it isnt a duplicate it will add the line to an arraylist i now need to the array list (decleared as arr) to go into listbox2 in short i need to make this line of code work as a crossthreaded call
[Code]....
I have following data in the arraylist..
HTML
ID Type Size
1 Car 1 1000
2 Car 2 1100
3 Car 3 1200
[Code]...
Public Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
OpenFileInArrayList(My.Application.Info.DirectoryPath & "/data/ck.dat", ArrayListCK())
End SUb Public Sub OpenFileInArrayList(ByRef PathFile As String, ByRef ArrayListCC As ArrayList)
Dim stream_reader As New IO.StreamReader(PathFile,System.Text.Encoding.UTF8)
[Code]...