Add TextBoxes value to ListBox and retrieve using C# and VB.Net in Windows Application

Hi dnnyobi,

Check this example. Now please take its reference and correct your code.

Form Design

Form contains two Buttons, one ListBox, one Panel and 4 TextBoxes inside the panel.

Code

C#

private void btnAdd_Click(object sender, EventArgs e)
{
    foreach (TextBox item in pnlFruits.Controls.OfType<TextBox>())
    {
        lstFruits.Items.Add(item.Text);
        item.Text = "";
    }
}

private void btnRetrieve_Click(object sender, EventArgs e)
{
    int i = 0;
    foreach (string item in lstFruits.Items)
    {
        List<TextBox> textBoxes = pnlFruits.Controls.OfType<TextBox>().ToList();
        textBoxes[i].Text = item;
        i++;
    }
    lstFruits.Items.Clear();
}

VB.Net

Private Sub btnAdd_Click(sender As System.Object, e As System.EventArgs) Handles btnAdd.Click
    For Each item As TextBox In pnlFruits.Controls.OfType(Of TextBox)()
        lstFruits.Items.Add(item.Text)
        item.Text = ""
    Next
End Sub

Private Sub btnRetrieve_Click(sender As System.Object, e As System.EventArgs) Handles btnRetrieve.Click
    Dim i As Integer = 0
    For Each item As String In lstFruits.Items
        Dim textBoxes As List(Of TextBox) = pnlFruits.Controls.OfType(Of TextBox)().ToList()
        textBoxes(i).Text = item
        i += 1
    Next
    lstFruits.Items.Clear()
End Sub

Screenshot