title: for each loop using a datagridview
body: <p>I trying to perform a calculation on some values within a DGV that has been imported from data within an xls file. but I cant get the loop to work. what I need it to do is read the value of the cells in column 2 and column 3 of each row, put them in to a text box and then output the result of the calculation to column 4 of the DVG. I would post the code but frankly I haven't got anything real to go on. am I correct in thinking I need to be using a For each loop???</p>
  
  <p>Any help or guidance is greatly appreciated.</p>
  
  <p>Thanks in advance</p>