[RESOLVED] [help code] exclude items from a listbox with a text file

Hello I START coding and i need help please!
OK i have a listbox1 with names
and a text file with a list of names
and i would like to exclude the names specifics in listbox1 with similar names in text file.

the result will be in text file.

example;

list in listbox:
henri
vincent
david
rocky
paul

list in text file:
vincent
rocky
paul

i want this result in text file
henri
david




thank you for yours answers! :wave:

What have you tried so far? A starting place would be reading the documentation for File.ReadAllLines Method

Hi,

what do you mean exactly ? do you want to remove Names that
are more than once in the Listbox ?

regards
Chris

not exactly, i want remove the names specific in listbox thank to a text file( in the text file there is the names i want to remove from the listbox)
i hope it clear
thanks for your help.

Quote:

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Originally Posted by danzey

not exactly, i want remove the names specific in listbox thank to a text file( in the text file there is the names i want to remove from the listbox)
i hope it clear
thanks for your help.

---

It was completely clear to me the first time. Why should I just write your code without you even trying? I gave you a starting point yet you ignored my reply because another post looked like an easy choice saving you writing any code.

What would you actually learn from me writing it for you? I gave you a starting point yet I can bet you have not even looked at it. vbforums.com is not here to write your projects for you. In this case a method.

Make an effort and I will happily keep nudging you in the right direction when you show actual effort. If not I will unsubscribe from this topic.

OK i am beginner but i am not lazy.;)
could you tell me if i go in the good path.

Code:

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1. record the text file in listbox1
2. remove the items in listbox2 thank to listbox1
Dim li As Object = ListBox1.Items
    ListBox2.Items.Remove(li) ;

---

thank you for your answers !

Assuming that the text file already contains some names and the user inputs names into a ListBox, you can do the following:

Step 1. Allow the user to insert names to a List(Of String) and then bind the List to the ListBox.
Step 2. Once the user's ready to only keep the unique values, add all the names that appear in the text file to the List(Of String)
Step 3. Select each value from the List(Of String) that only appears once
Step 4. Write the values from the List(Of String) back to the text file

Here is a quick example:

Code:

---

Public Class Form1
    Private names As New List(Of String)

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
        'bind the ListBox
        ListBoxNames.DataSource = names
    End Sub

    Private Sub ButtonAdd_Click(ByVal sender As Object, ByVal e As EventArgs) Handles ButtonAdd.Click
        'prompt for a name
        Dim name As String = InputBox("Please enter a name.")

        If Not String.IsNullOrWhitespace(name) Then
            'add the name to the List(Of String)
            names.Add(name)
        End If
    End Sub

    Private Sub ButtonRewrite_Click(ByVal sender As Object, ByVal e As EventArgs) Handles ButtonRewrite.Click
        'add the names from the text to the collection
        names.AddRange(IO.File.ReadAllLines("path.txt"))

        'get only the unique names from the collection by only keeping the names that appear once
        names = (From name As String In names Where names.ToArray().Count(Function(n) n = name) = 1).ToList()

        'rewrite the text file
        IO.File.WriteAllLines("path.txt", names.ToArray())
    End Sub
End Class

---

Quote:

---

Originally Posted by dday9

Assuming that the text file already contains some names and the user inputs names into a ListBox, you can do the following:

Step 1. Allow the user to insert names to a List(Of String) and then bind the List to the ListBox.
Step 2. Once the user's ready to only keep the unique values, add all the names that appear in the text file to the List(Of String)
Step 3. Select each value from the List(Of String) that only appears once
Step 4. Write the values from the List(Of String) back to the text file

Here is a quick example:

Code:

---

Public Class Form1
    Private names As New List(Of String)

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
        'bind the ListBox
        ListBoxNames.DataSource = names
    End Sub

    Private Sub ButtonAdd_Click(ByVal sender As Object, ByVal e As EventArgs) Handles ButtonAdd.Click
        'prompt for a name
        Dim name As String = InputBox("Please enter a name.")

        If Not String.IsNullOrWhitespace(name) Then
            'add the name to the List(Of String)
            names.Add(name)
        End If
    End Sub

    Private Sub ButtonRewrite_Click(ByVal sender As Object, ByVal e As EventArgs) Handles ButtonRewrite.Click
        'add the names from the text to the collection
        names.AddRange(IO.File.ReadAllLines("path.txt"))

        'get only the unique names from the collection by only keeping the names that appear once
        names = (From name As String In names Where names.ToArray().Count(Function(n) n = name) = 1).ToList()

        'rewrite the text file
        IO.File.WriteAllLines("path.txt", names.ToArray())
    End Sub
End Class

---

---

Thank you very much
i try it and this code is good but the step 1 are not related with my program. i let me explain to you

the database is fixed ( or stable) in a text.file and i want ,after loading this data (in listbox or else) thank to text file to delete the similars names
from this code, my problem is how to load my database (step 1) then execute the following ( i don t use a button)

Again thank you so much for your patience and your Help

Quote:

---

Originally Posted by danzey

Thank you very much
i try it and this code is good but the step 1 are not related with my program. i let me explain to you

the database is fixed ( or stable) in a text.file and i want ,after loading this data (in listbox or else) thank to text file to delete the similars names
from this code, my problem is how to load my database (step 1) then execute the following ( i don t use a button)

Again thank you so much for your patience and your Help

---

someone can help me , please?

Hi,

what code have you got sofar ?

your concept does'nt really make sence, if you have a Textfile with names why don't you
just open it and Add/Edit/Delete


regards
Chris

Quote:

---

Originally Posted by ChrisE

Hi,

what code have you got sofar ?

your concept does'nt really make sence, if you have a Textfile with names why don't you
just open it and Add/Edit/Delete


regards
Chris

---

yes but i want to make it automatically when i open my form.
the reason is to have a another file ( with others variables)
indeed, obtain a list name wihout, for example , the "qualified ones" because it is a program for sport

ok , i hope someone have the solution. thank you