c# datagridview checkbox check if other column value is 0 -

i have datagridview checkbox column(header: status) , textbox column(header: quantity). want check automatically checkbox column if quantity 0.

loop through rows if datagridview this:

foreach (datagridviewrow row in datagridview1.rows) {     //check column 3 quantity             if (row.cells[3].value.tostring() == "0")     {            //get checkbox in column 1 , cast checkbox         datagridviewcheckboxcell cell = row.cells[1] datagridviewcheckboxcell;              cell.value = cell.truevalue;     } }