C# ขอตัวอย่างข้อมูลใน DataGridView อยู่อีกฟอม มาโชว์ในอีกฟอม Textbox

private void selectedRowsButton_Click(object sender, System.EventArgs e)
{
    Int32 selectedRowCount =
        dataGridView1.Rows.GetRowCount(DataGridViewElementStates.Selected);
    if (selectedRowCount > 0)
    {
        System.Text.StringBuilder sb = new System.Text.StringBuilder();

        for (int i = 0; i < selectedRowCount; i++)
        {
            sb.Append("Row: ");
            sb.Append(dataGridView1.SelectedRows[i].Index.ToString());
            sb.Append(Environment.NewLine);
        }

        sb.Append("Total: " + selectedRowCount.ToString());
        MessageBox.Show(sb.ToString(), "Selected Rows");
    }
}

Private Sub DataGridView1_CellDoubleClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellDoubleClick
       
 If e.RowIndex = -1 Then
            Exit Sub
        End If



        If IsDBNull(DataGridView1.Rows.Item(e.RowIndex).Cells(0).Value) Then

            MessageBox.Show("จะคลิกช่องว่างทำไม", "มั่วตลอด")
          

        Else

textbox1.text = DataGridView1.Rows.Item(e.RowIndex).Cells(0).Value
textbox2.text = DataGridView1.Rows.Item(e.RowIndex).Cells(1).Value
textbox3.text = DataGridView1.Rows.Item(e.RowIndex).Cells(2).Value
textbox4.text = DataGridView1.Rows.Item(e.RowIndex).Cells(3).Value
textbox5.text = DataGridView1.Rows.Item(e.RowIndex).Cells(4).Value


            End If
    End Sub

 if (e.RowIndex == -1)
            {
                return;
            }//if
      textBox1.Text = dv1.Rows[e.RowIndex].Cells[0].Value.ToString();
      textBox2.Text = dv1.Rows[e.RowIndex].Cells[1].Value.ToString();
      textBox3.Text = dv1.Rows[e.RowIndex].Cells[2].Value.ToString();