I 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 RepliesThe 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"?
I 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]....
I'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.
I 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 Replieshow 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?
Class Murid
Implements IComparable
Public strNama, strKelas As String[code].....
I 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].....
VB
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'.
I 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 RepliesI 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.
My 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]....
I 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"
I 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].....
I 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?
I 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?
I'm trying to create a pivot table by opening an Excel file from my drive.But I'm receiving the error saying "Object reference not set to an instance of an object".[code]
View 1 RepliesI'm having this problem with my code and cannot seem to get past it although it was working fine before. The error is "An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object." The code is:
CODE:
I am trying to get information to be pulled out of a database and show in text boxes on another form (frmviewsdets). The error occurs when it gets to the line frmviewsdets.txtsnumber.Text = rdr("StudentNumber") and even when a breakpoint is applied there it just moves on to the next and so on.
I have tried to show frmviewsdets before I pull the data out of the database beut I get the same message.
I want to create a autorun program that doesn't need a autorun.inf file. Is there any way to do this?
View 3 RepliesI am having some trouble creating an object array of different object types. Here is what I have so far:
Public Sub New()
Dim b1 As New Book("Book Title 1", "Gold Book Publisher", 1.0, "Bob Jones", "192DJDJD212", "01/02/10")
Dim b2 As New Book("Book Title 2", "Gold Book Publisher", 1.0, "Bob Jones", "192DJDJD212", "01/02/10")
Dim b3 As New Book("Book Title 3", "Gold Book Publisher", 1.0, "Bob Jones", "192DJDJD212", "01/02/10")
[code]....
If I define the array As Book (Public publicationArray(6) As Book) or Magazine (Public publicationArray(6) As Magazine) I am able to access the properties of that class but not both. I think I need to define a type for each array instance but not sure how to do this.
I have read through the following page: [URL]
Now I have my application and an installer project, which can install my application. how to make my application auto-update (from my web server) like a smart client. I've looked into ClickOnce, but it does not appear to be suitable as I cannot do any custom installation steps. My application needs to create folders and copy other files from the CD to the hard drive, which I don't believe ClickOnce supports. On the other hand, the Windows Installer does not natively support any sort of auto-updating. So what do I do?
I have read that it is possible to combine both technologies, but all my research into this has turned up nothing of use.
I've looked into the Updater Application Block (Version 2.0), but I'm not sure if this is what I'm looking for? I'm using Visual Basic 2005 and I'm not sure if the Updater Application Block supports .NET v2.0. In fact, when I tried to install the Enterprise Library, it said I need .NET v1.1??? Even if this is a possible path, I'm really quite lost when reading through the documentation as nothing seems to point towards practical examples, especially in Visual Basic.
I've also had a look at the System.Deployment.ApplicationDeployment class, but it seems as though this only works with ClickOnce applications. However, since I can't seems to use ClickOnce in my situation, this does not seem like a viable option. Is it possible to use System.Deployment.ApplicationDeployment outside of a ClickOnce application?
I'm really quite lost as to how other people produce custom installing applications that have auto-updating features. Virtually every modern piece of software does it, but I cannot seem to find anything on the web that points me in the right direction of how to achieve this with Visual Basic 2005.
I am trying to get vb 2008 to send an automated Email to a specified Email address with a new password code. Unfortunately one of the final few lines of code creates an error when run and I'm not sure why.I am using a googlemail account to send the email and I'm using the smtp port number for gmail so I don't know whether that will be a problem as I didn't know where to find one for googlemail (got the gmail one off a tutorial).
View 1 Replieshow to create a Auto repeated Mouse movement.I wanna create a Form, with a button "start 01" and "start 02",so if I click on "start 01" button, and i open my other applications, and once I hit the F1 button (on my keyboard) the mouse will auto move from point A to B, and it will keep on repeat until I hit the F12 button, then it will stop auto moving.and if I click on the "start 02" button, and II open my other applications, and once I hit F1 button (on my keyboard) the mouse will now move from D to E, and it will keep on repeating it until I hit the F12 button, then it will stop auto moving.
View 8 RepliesI'm currently housing a ListView on a single form, and then adding buttons to this ListView via code-behind. Everything works wonderfully except the fact that when there are too many items added to the list it doesn't create a vertical scroll bar? I can simply add as many buttons as I want to it without it creating one? Here's the code that adds the button to the list: [Code]
View 2 RepliesI want to create an application similar to "Windows Live Writer"(that is for blogs) but this one is for forums..This application is solely for my personal use only.I would like to have a facility where I have 2 text boxes--> One for username and one for Password along with a submit button.On clicking Submit I need a msgbox to display whether Login Succeeded or Failed, and depending he should be directed to create a new post in any particular section of that forum..Consider for now,the forum I am trying to do this is, vbforums.com..Its just like OFFLINE creating and then posting..I have already created forms,BBCode Editor, GUI for this purpose and want to start with Communication coding.I tried using Http request but based on its response I dont know how to distinguish between valid user and invalid user.
View 2 RepliesIf say in my datatable i have one column called order number and one column called line. Whats the best way to keep repeating the order number into everyrow, whilst incrementing the line number until i add a new value in the order number column.
So it'd go like this..
Order#______Line
4568________1
4568________2
4981________1
My application does some intensive tasks on a second thread, while updating the main form. I want to show how long these tasks have been running (increments every second), i've read timers can get out of sync and even fire off multiple ticks at once, so how can that be fixed, or what's a better solution for this?
View 3 RepliesIn a loop, i'm looking to add 1 to Var1's value everytime the loop goes.I've tried
[Code]...
i need a 2 digit prefix that increments. 1 - 99.. after reaching 99 it will be 100, that what im supposed to trap. if must be a0 - a9, after then b0-b9 ...... z0-z9.
View 3 RepliesWhat 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].....