.net – 带有now(Date)默认值的可选参数

如何为可选参数指定默认的Date Time(Now)值.

将Now对象分配给可选参数时,会引发错误

Constant expression is required

码：

Public Sub ReminderMail(Optional ByVal ReminderMailDate As DateTime = Now)

// Code Block

End Sub

解决方法

试试这个 ：

Public Sub ReminderMail(Optional ByVal ReminderMailDate As DateTime = nothing)

If ReminderMailDate = nothing Then ReminderMailDate = Now

// Code Block

End Sub