If I set the capacity of a List(of T) and then want to add more item will it expand automatically or will I get an Out of Bounds error?Any source of information about List(of T) out there that I can check?I am writing an application that gets a text file read into a List(of T) and then searched by the user
View 10 RepliesI am working on a project for a class, and am having trouble getting my program to automatically calculate the subtotal every time an item is added to the shopping cart list. I've tried sub procedures and functions, but I can't seem to get it to work.
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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.
View 5 RepliesI 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.
View 11 RepliesI have a button that when pressed I want it to remove all the ending urls that have ending with / just to remove / item on the end so it will live me a url with out / on the end if u know what I mean. [Code]
View 26 RepliesI have a list box that is custom drawn...I was wondering how i can get the rectangle for a specific item (not in the drawitem event) so that i can call (for instance):
vb List.Invalidate(GetItemRect(List, ListItem))
And it would just redraw that one item
This is my problem, i have created a series of lists of stock items, i now need to remove items in one of the lists that exist in another list. simple enough except the quantity of stock is not necessarily the same so removing an object of the type stock wont work as they are not identical (stock amount not the same) any ideas on how to remove this item from my list?
View 8 Repliesvb.net
Dim NewsItem As New ListViewItem
NewsItem.Text = reader("Title")
NewsItem.Tag = reader("NewsID")
NewsItemList.Items.Add(NewsItem)
I'm looping though results in a db and adding items to my list view however i it's adding like tihs
ListViewItem: { Title showing here }
ListViewItem: { Another Title showing here }
ListViewItem: { And AnotherTitle showing here }
What am I doing wrong it should just read
see if an object is already in a generic List(Of T) than the way I am currently doing it? The way I do it at the moment is like so:I have a method that I call each time I want to check to see if an object exists in the list (if it already exists I do not want to add it again) and the list to check is passed in to this method along with the item that should be added to it:
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So as you can see this function just loops through the list that was passed in and if the DisplayName property of one of the items in the list is the same as the ProgramName argument that was passed in to the method as well then it returns True to indicate that this program is already in the list.I thought about using a Predicate with the List.Find method but cant see how I would get it to work because that predicate method will not have any way of referencing the list (its a method local list, not class level)
i have a listbox (listbox1) which is populated via the user selecting a folder and the listbox1 displays all the subfolders of that folder, and a second list box (listbox2) which display all the files within the folder selected in the 1st list box.
And i have a checksum scanner on the same form, which when the 'scan' button is clicked i want to scan the listbox2 selected item, but i cant seem to get it working, heres my
Private Sub scan_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCrc.Click
Dim c As New CRC32()
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I am trying to go to the next item in a listbox automatically when a song finishes in my media player. I've done this in my other player, but unfortunately have lost the source code.
I have this code
If MediaPlayer1.playState = WMPLib.WMPPlayState.wmppsStopped Then
ListBox1.SelectedItem = Me.ListBox1.SelectedItem + 1
MediaPlayer1.Ctlcontrols.play()
End If
But everywhere I put it, it just doesn't work.
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.
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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?
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
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When adding a new item (class, control, etc) in C# it will automatically add a namespace to the file depending on the location in the project.
Is this also available for VB.NET?
The code 'Namespace DataClasses.AX' and 'End Namespace' would be generated.
Namespace DataClasses.AX
<Serializable()> _
Public Class AxInventItem
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When my application starts, it scans the computers registry for COM ports and adds them in the combo box. The combo box first index is just a blank, and the second is COM1, COM2,...COMn. What I want to do is by default, I want my program to select the first COM port in the combo box, so in this case, COM1.
I know I have to use the PORTNAME property of the serial object, but not sure how I would set that equal to the 2nd index of the combo box.
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)
I'm trying to automate a form process from a previous employee. One of the things that I have to do to achieve this is select a COM port from a dynamically populated list. I've looked around and the closest thing I could come up with is something like:
.cbbCOMPorts.SelectedItem(1) =
True
While this compiles, the computer does not like this at run-time. It throws an exception out:
"Object variable or With block variable not set."
I am using a combobox in VB .net to show customer's name. They also can type new names if they wish. Can I somehow save these new names in my sql database dynamically?
What I mean is if the name is new and does not exist in my database, can it be automatically saved to the database?
My combobox is bound to my name table.
Is there an easy way to scroll an ASP.Net ListBox automatically to the first selected Item?[code]...
View 1 Replieshow can i automatically update my value when a user changs the listbox item. At the moment i have a button click when the user changes the list box item and press the button the values get updated, everytime the listbox item get changed i have to repeat it click the button to update the value. I want something where automitically as soon as the listbox item selected the total value in the text box to change without clicking the button:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If ComboBox1.SelectedItem = "Seafood" Then
TextBox1.Text = 3.5 * ComboBox2.SelectedItem
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I have template designer form with scroll bar and maximized mode in MID form. Now, when I click on any of the item of ListBox placed at the the middle of the form, form automatically scrolls to the selected item. Is there any way to prevent auto scrolling?
View 3 Replieshow 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.
View 2 RepliesPublic Class notifierMain
Public Class Contacts
Inherits List(Of row)
Public Sub New()
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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?
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?
View 3 RepliesI 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)
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
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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.
View 3 Replieson visual basic 2006 I made a programs which blocks illegal connection to my game server and it closes the some illegal programs.But I need to get the file from ftp when the important files is needed.I did ftp connection from server to my client but actually what i want to do is downloading files from my ftp of web automatically.It is not important whether your helping is about Vb.Net or Vb 2006 , it's up to you , I know how to change the codes from Vb 2006 to Vb.Net.How can I achieve to download file from ftp folder and how can I do to check the files whether they are downloaded or not ?
View 2 RepliesWhen typing in Visual Studio the list of possible values returned by the Intellisense is not limited to the possible values for the type and instead lists all the items.In the example below after I type the '=' to set the default value for a property, intellisense will list hundreds of possible values instead of just the ProductTypes.Item1, ProductTypes.Item2 & ProductTypes.Item3.
View 1 RepliesPublic Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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