Coalesce operator and Conditional operator in VB.NET
本问题已经有最佳答案,请猛点这里访问。
Possible Duplicate:
Is there a conditional ternary operator in VB.NET?
嗨,伙计们,我们可以使用coalesce运算符(??)和条件三元运算符(:)在vb.net中,如在c?
我认为您可以使用内联if语句:
1 2 3 4 5 | //C# int x = a ? b : c; 'VB.Net Dim x as Integer = If(a, b, c) |
1 2 3 4 5 6 7 8 9 10 11 | Sub Main() Dim x, z As Object Dim y As Nullable(Of Integer) z ="1243" Dim c As Object = Coalesce(x, y, z) End Sub Private Function Coalesce(ByVal ParamArray x As Object()) Return x.First(Function(y) Not IsNothing(y)) End Function |
仅供参考,字符串的coalesce运算符
1 2 3 4 5 6 7 8 | Private Function Coalesce(ByVal ParamArray Parameters As String()) As String For Each Parameter As String In Parameters If Not Parameter Is Nothing Then Return Parameter End If Next Return Nothing End Function |
如果应该是IIF