Search and replace text in a datagridview c#

Question

I am trying to search and replace a specific text in all the rows.I have managed to search the text in all the rows and display it accordingly but i don't know what to do with replacing.I have tries this but it doesn't seen to work.Here is the code.

  private void button7_Click_3(object sender, EventArgs e)
  {
        string filterBy;
        filterBy = "Stringtext Like '%" + textBox6.Text + "%'";
        ((DataTable)dataGridView1.DataSource).DefaultView.RowFilter = filterBy;
        int rows = dataGridView1.Rows.Count;
        for (int i = 0; i < rows-1; i++)
        {
            dataGridView1[2, i].Value.ToString().Replace(textBox6.Text, textBox7.Text);       
        }
        dataGridView1.Refresh();
    }

Answer 1

Try this in the loop:

dataGridView1[2, i].Value = dataGridView1[2, i].Value.ToString().Replace(textBox6.Text, textBox7.Text);