Passing selected listbox item from ownedform to main form - C#

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C#

ListBox

forms

Hi, I have a datagridview in the main form. By clicking on a particular column of datagridview, it will open the sub form or ownedform(dynamically created). The owned form have a listbox and an OK button. When The user selects an item from listbox and click OK then selected text needs to be appear on the datagridview cell. But when i click OK i couldn't get the result. I am not receiving any error neither.Here's the code

NOTE: If use Textbox instead of listbox, i am able to pass the value to datagridview. I just don't know the way to handle listbox to pass value.

CODE FOR DYNAMICALLY CREATING OWNED FORM & ADDING CONTROLS

private List

BUTTON CLICK EVENT HANDLER - NOT WORKING (LISTBOX)

private void dbtn_Click_SIGTB(object sender, EventArgs e)
        {
            int rowidx = dataGridView3.CurrentCell.RowIndex;
            int colidx = dataGridView3.CurrentCell.ColumnIndex;
            foreach(ListBox lb in inputlistboxes)
            {
                string selected = lb.GetItemText(lb.SelectedItem);
                dataGridView2.Rows[rowidx].Cells[colidx].Value = selected;
            }
            
            foreach (Form frm in ownform)
               frm.Close();
        }

BUTTON EVENT HANDLER - WORKING (TEXTBOX)

private void dbtn_Click_VARTB(object sender, EventArgs e)
        {
            int rowidx = dataGridView2.CurrentCell.RowIndex;
            int colidx = dataGridView2.CurrentCell.ColumnIndex;
            foreach (TextBox txt in inputTextBoxes)
                dataGridView2.Rows[rowidx].Cells[colidx].Value = txt.Text;
            foreach (Form frm in ownform)
                frm.Close();
        }

DATAGRIDVIEW CELL CONTENT CLICK

private void dataGridView3_CellContentClick(object sender, DataGridViewCellEventArgs e)
       {
           if (dataGridView3.CurrentCell.ColumnIndex.Equals(3))
           {
               ShowMyOwnedForm_SIGTB();
           }
       }

What I have tried:

private void dbtn_Click_SIGTB(object sender, EventArgs e)
{
int rowidx = dataGridView3.CurrentCell.RowIndex;
int colidx = dataGridView3.CurrentCell.ColumnIndex;
foreach(ListBox lb in inputlistboxes)
{
string selected = lb.GetItemText(lb.SelectedItem);
dataGridView2.Rows[rowidx].Cells[colidx].Value = selected;
}

foreach (Form frm in ownform)
frm.Close();
}