Simple listbox problem

[CarraSome]

hi... I have just started VB.net and tried to find online for solutions to my problem but I couldn't understand......

say if I have a list box called ListBox1

how do I actually display all data from ListBox1 into a label?

[shakti5385]

Welcome On the forums

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Me.ListBox1.Items.Add("Shakti")
        Me.ListBox1.Items.Add("Singh")
        Me.ListBox1.Items.Add("Dulawat")
    End Sub
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim Item As Object
        For Each Item In Me.ListBox1.Items
            Me.Label1.Text = Me.Label1.Text + Item
        Next
    End Sub

This is the just simple example as you want but i suggest use MSDN for learning all the property and use of the DOT net event.
For more detail click on the MSDN at my signature and search there.

[CarraSome]

Thanks for the guide

for the second part of the code

Dim Item As Object
For Each Item In Me.ListBox1.Items
Me.Label1.Text = Me.Label1.Text + Item
Next

is this the only way?

What about

Dim i as Integer
For i =0 To ListBox1.Items.Count - 1
.......
Next

I'm actually wondering what could be put inside the ... I tried
label1.text = ListBox.Items(i)
and a few different type all are not able to work

[CarraSome]

oh I tried your codings and I have some errors

Operator is not balid for string "" and type 'ListItem'

Exception Details: SYstem.InvalidCastException: Operator is nto balid for string "" and type ListItem ''

inside the listbox I put numbers(int)

[sparrow1]

oh I tried your codings and I have some errors

Operator is not balid for string "" and type 'ListItem'

Exception Details: SYstem.InvalidCastException: Operator is nto balid for string "" and type ListItem ''

inside the listbox I put numbers(int)

Hi,

How did you coded, because I've tryed and it's working like it should.
Without any errors.

Wkr,

sparrow1

[CarraSome]

This is the part of my codes

for adding into the listbox

Dim pet As String
pet = txtPet.Text
Listbox1.Items.Add(pet)

for extracting its

Dim Item As Object
For Each Item In ListBox1.Items
Label1.Text = Label1.Text + Item
Next

[sparrow1]

This is the part of my codes

for adding into the listbox

Dim pet As String
pet = txtPet.Text
Listbox1.Items.Add(pet)

for extracting its

Dim Item As Object
For Each Item In ListBox1.Items
Label1.Text = Label1.Text + Item
Next

Hi,

You can try this:

Me.Listbox1.Items.Add(txtPet.Text) ' add item to listbox
 
Dim Item As Object
        For Each Item In Me.ListBox1.Items
           Me.Label1.Text = Me.Label1.Text + Item
        Next

Hope it helps,

sparrow1

[CarraSome]

what does the Me. actually do?

I'm still having the same error...

has it got to do with the Me. ?

[sparrow1]

what does the Me. actually do?

I'm still having the same error...

has it got to do with the Me. ?

Hi,

You can try to create a new testapp with a listbox, label and textbox ans 2 buttons, then use this code. Write something into the textbox and added into the listbox you'll see that it works

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim Item As Object
        For Each Item In Me.ListBox1.Items
            Me.Label1.Text = Me.Label1.Text + Item
           
        Next
    End Sub
 
       Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Me.ListBox1.Items.Add(TextBox1.Text)
    End Sub

Wkr,

sparrow1

[gigemboy]

Operator is not balid for string "" and type 'ListItem'

Exception Details: SYstem.InvalidCastException: Operator is nto balid for string "" and type ListItem ''

The errors are because you are using the "+" operator instead of the string concatenation operator, which you should be using. Also, you are trying to concatenate an object to a string, which you shouldn't do. You should use the "&" character to concatenate, and then use the object's .ToString method in order to get the string representation of the object in the listbox.

'displays each item in the listbox on a new line in a label
For Each Item As Object In ListBox1.Items
       Label1.Text &= Item.ToString & Environment.NewLine
Next