Getting gridview data in variables and inserting it to database - asp.net

Question

I am making a shopping cart type of thing using grid view user will keep adding item in it after doing it so user will click save i want to get values from all columns of grid view each row at a time and save it to database.
here is the code for grid view load
protected void add_Click(object sender, EventArgs e)
{
product.Item = Item_Drop.SelectedItem.Text;
product.Quantity = quantity_box.Text;
int qun =Convert.ToInt32(quantity_box.Text);
int unitP= Convert.ToInt32(unitPrice_box.Text);
product.item_Toal = (qun*unitP).ToString();
list.Add(product);
temp_gridView.DataSource = list;
temp_gridView.DataBind();
}
And here is what i am trying to get values
public void Values_from_grid()
{
foreach(temp_gridView row in temp_gridView.Rows)
{
for(int i = 0; i < temp_gridView.Columns.Count, i++)
{
String header = temp_gridView.Columns[i].HeaderText;
String cellText = row.Cells[i].Text;
}
}
}
i am not getting any values in "header" or "cellText" . .. .

Answer 1

Use this code to get header row value .
GridViewName.HeaderRow.Cells[0].Text;

Answer 2

Found Answer no need to use
GridView.Rows.Count
just use a simple int to iterate
int i = 0;
foreach(GridViewRow row in temp_gridView.Rows)
{
box.Item_id = temp_gridView.Rows[i].Cells[0].Text;
box.Quantity = temp_gridView.Rows[i].Cells[1].Text;
box.Total = temp_gridView.Rows[i].Cells[2].Text;
i++;
}