Total Hrs based on input data Output fill in Status, if value (Total Hrs) is present greater 1 mins write in Done (Status Columns). if no data Output Write in Not Done (Staus columns)… All Other empty Cell fills 00.00.
You can either use Filter Datatable to filter the rows with null value or you can use the below linq query(in the doc). Then you can get only the Asst.Name which are null. Then loop through that values and filter the main Datatable using the Asst.Name which we already extracted and update the value of Status,OnTime,Out Time and Total hrs using Update Row Item activity.