c# - Got error in Crystal Report formula -


presently have formula field sum of particular field.now want perform condition on that.i want sum of amountpending column when seatno column not blank.

if {datatable1.seatno != ""}  sum ({datatable1.amountpending}) else 

if not(isnull({datatable1.seatno}))   sum ({datatable1.amountpending}) else   0

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