代码例子:
Dim dd1 As DataRow = e.DataRow
Dim dd2 As Date = e.DataRow("预计日期")
Dim dd3 As Integer = (dd2 - Date.today).TotalDays
If dd1("预计日期") = Nothing Then
e.DataRow("剩余天数") = dd3
End If
代码写的有点乱.