主题：这个表达式怎么写

如，休假天数，这样写

iif(日1='休', 1, 0) + iif(日2='休', 1, 0) + iif(日3='休', 1, 0)

DrawCell事件，写代码

If e.Col.name.StartsWith("日") Then
    Dim y As String = e.Row("年份")
    Dim m As String = e.Row("月份")
    Dim d  As Integer = e.Col.name.replace("日", "")
    If y <> Nothing AndAlso m <> Nothing Then
        If Date.DaysInMonth(y, m) >= d Then
            Dim dy As Date = new Date(y, m, d)
            If dy.DayOfWeek = 6 Then
                e.Table.DataTable.AddUserStyle("绿", color.green, color.black)
                e.style = "绿"
            ElseIf dy.DayOfWeek = 0 Then
                e.Table.DataTable.AddUserStyle("红", color.red, color.black)
                e.style = "红"
            End If
        End If
    End If
End If