.net - Comparing datatable values between row for change detection -


my goal detect & write information value changed before update row database.

for example, have 2 datatables same column structure: beforeedit , afteredit. in case, have 1 row each datatables.

for integer = 0 beforeedit.columns.count - 1     if beforeedit(0).item(i) <> afteredit(0).item(i)         'storing log column have changed     end if next

is there better approach task?

thanks in advance

you don't need 2 datatables. each datarow maintains 2 copies of data. rowstate property of datarow can tell whether has changed or not. unchanged if no change has occurred , modified otherwise. can use code determine if , changes have occurred in datarow:

private sub logrecordchanges(row datarow)     if row.rowstate = datarowstate.unchanged         console.writeline("no changes row.")     else         each column datacolumn in row.table.columns             dim currentvalue = row(column, datarowversion.current)             dim originalvalue = row(column, datarowversion.original)              if currentvalue.equals(originalvalue)                 console.writeline($"no changes column '{column.columnname}'.")             else                 console.writeline($"column '{column.columnname}' changed '{originalvalue}' '{currentvalue}'.")             end if         next     end if end sub

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