how do excel find in datagridview !?

Question

hi

i used this code to search in datagridview to find and select row ! (no filter)
butt, when datagrid have Repetitive value in row's ---> dont get next row !
How do I put a button to the next row with every click to Btn_find ?
(Find similar Excel)

 

 

private void button1_Click(object sender, EventArgs e)

        {

            button1.Text = "Find Next";

            {

                foreach (DataGridViewRow row in dataGridView1.Rows)

                {

                    if (row.Cells["ProductId"].Value == null)

                    {

                        continue;

                    }

                    if (row.Cells["ProductId"].Value.ToString().Trim() == textBox1.Text)

                    {

                        dataGridView1.CurrentCell = row.Cells["ProductId"];

                        dataGridView1.FirstDisplayedScrollingRowIndex = dataGridView1.Rows[row.Index].Index;

                        return;

                    }

                }

            } 

        }