Coalesce Operator und Conditional Operator in VB.NET

Question

Mögliche Duplizieren:
Is there a conditional ternary operator in VB.NET?

Hallo Jungs, Können wir Coalesce Operator (??) und bedingte ternäre Operator (:) in VB.NET wie in C#?

Answer 1

Ich denke, man kann mit der Verwendung eines Inline-nahe kommen if-Anweisung:

//C# 
int x = a ? b : c; 

'VB.Net 
Dim x as Integer = If(a, b, c) 

Answer 2

Wenn sollten IIf sein

Dim x as Integer=IIf(a,b,c)

Answer 3

nur als Referenz, Coalesce Operator für Streich

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 

Answer 4

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