Get data from each row of a column in C #

It’s as follows, I have a DataGridView with multiple columns. In each line of this DataGridView will be presented the installation path of a program. With this displayed value, I’d like to use it to get the size of that folder and put it in a new column.

I have a method to calculate the size of a string:

private static long ObterTamanhoDiretorio(string tamanhoDir)
{
    DirectoryInfo dire = new DirectoryInfo(tamanhoDir.ToString());
    return dire.EnumerateFiles("*.*", SearchOption.AllDirectories).Sum(fi => fi.Length);
}

I do not know if it’s something like this that I have to use.

foreach (DataGridViewRow item in dataGridView1.Rows)
{

}

What I like to know is how to get this value by seeing each line.
If you have any ideas, thank you.

If you wish to perform this action when loading the data you can use the event
‘OnRowDataBound’:

  gdvView.DataSource = Lista;
  gdvView.DataBind();


protected void GdvViewOnRowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            e.Row.Cells[0].Text = "dados coluna 1";
            e.Row.Cells[1].Text = "dados coluna 2";
        }
    }

If you need to make the change after the Grid is populated, the for or foreach can be used.

  for (int i = 0; i < gdvView.Rows.Count; i++)
        {
            gdvView.Rows[i].Cells[0].Text = "novos dados";
        }

Or

 foreach (var row in gdvView.Rows)
        {
            ((gdvView)row).Cells[0].Text = "testeeeee";
        }