Find An Index In A Listbox?
Jan 8, 2012Whenever I try to find an index in a listbox, i get the answer as -1.here's my code.
[code]...
Whenever I try to find an index in a listbox, i get the answer as -1.here's my code.
[code]...
I have loaded datatable to listview.Now when i try to do a selected index and retrieve data to display in respective text box. I find some error "input string format incorrect".but when i directly load from folder it works fine.
Data that retrieved from Datatable.Im not able to find the index of the row. But from folder and listed in ListView.Index value is found.
Dim breakfast As ListView.SelectedListViewItemCollection = Me.LOV.SelectedItems
For Each item1 In breakfast
index += Double.Parse(item1.SubItems(1).Text)
Next
I need to find a method of looping through a listbox and retrieving the index number and values - quite straightforward in asp, but turning out to be something of a nightmare in winforms!Here is the scenario - The user can add values in a textbox, that are in turn added to a DataTable that gives it a unique ID and a row number, this is then bound to the listbox. The user can then move the items up or down the list by adjusting the row number in the datatable and rebinding to the listbox..
The problem that I am hitting is when the user needs to delete an item -the first part is easy - delete from the DataTable and rebind to the listbox. The bit where I hit the proverbial brick wall is needing to loop through the listbox rows and getting both the index number and the ValueMember - that way I can change the row numbers in the DataTable based on the index number against the ID number.
i am having trouble putting a value in a textbox. Each time a ticket is sold i put the total price in a textbox, each time a ticket is sold for the same concert it increases by adding its self to the total price. It works at the first sale, but after that it breaks down. here is the code
Private Function DisplayMoneyTaken() As Integer
Dim totalMoney As Integer
'open the database connection
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what it does iswhen a user checks an item in the checked list box it transfer it to a listboxso i have a checked list box and a listboxi am planning to put another listboxwhat i would like to be able to do is thatwhen the user checks an item on the checked list box it will transfer the item into the listbox [like the one on my previous thread]and be able to show an messagebox with a textbox [ i read its called an input box ] or another form with a textbox and/or combo box will pop up
View 13 RepliesIm just going to have to get used to this language for the rest of the semester And smohd, I will get back to you with my problem. That "Me..." control is so random. Not like JAVA Why am I getting an error with totalGrade
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Is it possible to get the row index of a DataTable so that you can access the previous and next row? For example I have a DataTable that contains two columns ChapterTitle and PageURL. This is for a table of contents of a book. ChapterTitle is the chapter name and PageURL is an HTML page that contains the chapter (chaptername.html). When going into one chapter of the book I want to be able to tell which is the next and previous chapter.
After finding the chapter that I'm currently in how can get the next and previous rows?
ChapterTable.Select("PageURL = '" & PageURL& "'")
This is the code for my array (which is working)
Public numUsers As Integer
Public fNameUsers As String = ("......users.txt")
Public UserRecords As Usersclass() 'note... this line is in a module '
reader = New System.IO.StreamReader(fNameUsers)
numUsers = 0
'Split the array up at each delimiter of "," and add new objects '
Do While reader.Peek <> -1
ReDim Preserve UserRecords(numUsers)
oneline = reader.ReadLine
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if i have a multidimensional array:
dim test(,,) as string
how can i loop through the array to find if another variable is contained in the second dimension of the array
dim x as integer = test.indexof(OtherVariable)
obviously above won't work
I have an List(of String), i need to find the index of a particular string in that list. I have searched msdn , but i am confused over the predicate methods. I have never used predicates. This i what i have tried
vb
'on button1 click
Dim Heads As List(Of String) = Me.GetSelectedNodes()
Dim tmp As Integer
[Code].....
How should i find the index of the value member in an combobox?
View 4 RepliesHow to find index in vb.net when connected with ms-access2007:)
View 5 RepliesIve got two lists (each representing a table in a DB, so they are related). lstTransaction has t_id, date, and cust_id. lstCustomer has Name, and cust_id.For each item in lstTransaction Id like to find the index in lstCustomer where lstCustomer.cust_id = lstTransaction.cust_id.
View 5 RepliesI have a string that goes like "abcdefg..."
I would like to find the index where the letter d is at, so I can get the number 3.
I managed to do it by looping through each letter in the string, but that doesn't sound very convenient.
i need to find the location of element by index
example i enter 5 numbers
1 2 3 4 5
search a number, i search 3 it should display the lindex location? for me to understand more about vb,,more on arrays..
How I can find the index for the listview on a listview click event to something like this:
Code:
Private Sub listView1_Click(ByVal sender As Object, ByVal e As System.Windows.Forms.ItemCheckEventArgs)
MessageBox.Show(listView1.Items(e.Index).SubItems(1).Text)
End Sub
I don't want to use for each integer in the listview as i would keep getting the loops which I would hate to use it. I only want to use something like e.Index. I know that the index is not a member in e, but I don't want to use listview item check event due to loops. How I can find the index for the listview items without using for each integer as only using e.index?
I am using the stack class to store a collection of lines. <code>Dim myStack As New Stack(Of Line)</code> I want to find out what the index is of one of the lines that are in the collection and I'm not sure how to do this. i tried to use array.indexOf:
[Code]...
How I can find the index for the listview on a listview click event to something like this:
Private Sub listView1_Click(ByVal sender As Object, ByVal e As System.Windows.Forms.ItemCheckEventArgs)
MessageBox.Show(listView1.Items(e.Index).SubItems(1).Text)
End Sub
I don't want to use for each integer in the listview as i would keep getting the loops which I would hate to use it. I only want to use something like e.Index.
I know that the index is not a member in e, but I don't want to use listview item check event due to loops.
how I can find the index for the listview items without using for each integer as only using e.index?
This is my first post, but I plan on becoming part of the community now that i'm in a VB.net Class. I've been searching through all of my notes and power-points to try and answer this simple question I have a program that contains two radio buttons ( Residential and Business) and two list boxes (Premium Channels and Connections) I need to make it so that when the radio button Residential (radResidential) is selected the listbox selectedindex (lstConnections) stays at 0 ?
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I have been looking over some old vb 6 code and I noticed that there was a way to set the index of a listbox to a new value. For instance, if you wanted to populate a listbox with items from a database you could assign an id value from the table as the index value so that it is easier to relate back to the database. Does anyone know if and how to do this in vb.net?
View 1 RepliesMy project is scanner for example. Then This is my code...
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When i load my database i load it into a DataSet.When i search the database i load the results in to a DataTable.I want to find what index a search result has in the DataSet.When navigating the dataset i can use this code to get the index ds.Tables"Filmer").Rows.IndexOf(ds.Tables ("Filmer"). Rows(inc))But i can't make i get the dataset index of a search result from the DataTable.I thought that i could use the same code when navigating the DataTable, but it only returns.
View 3 RepliesSay I have a list and I have an object. I want to find the index of that object in the list.
View 1 RepliesI have one datagrid with bound items and Radio button.
I want a index of the row which i selected by chacked the
the radio button.
i used Datagrid.selectedindex
but it gives -1 every time.
Is there any way to find the index number of Child Node.in above shown example is it possible to find Node index of -Node32
View 4 RepliesPrivate Sub minschanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles txtAct1.TextChanged, txtAct2.TextChanged, txtact3.TextChanged, txtact4.TextChanged, txtact5.TextChanged
[Code]....
When one of the boxes is changed, I would like to find the index of the sender object that was changed in the txtmins() array.
I have a list view, of which I want to find the index of... Using the click event, I have no problems at all with this code, but SelectedIndexChanged throws this at me:
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How can I get an item of a specified index form listbox in a messagebox without selecting any item in listbox.
View 1 RepliesHow to find the seleted row index of datagridview
View 1 RepliesI have the following code:
indexOfSearchText = TextBox1.Find(item, start, TextBox1.TextLength, RichTextBoxFinds.WholeWord)
If indexOfSearchText <> -1 Then
startindex = indexOfSearchText
End If
But I want just the first result, if I have an example text:
then it searches twice "is", I just want the first "is".