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We have this method call:
SendAck(AppData:=AppData, Status:=Status, StatusMessage:=StatusMessage, IsApplication:=IsApplication)
And here is the definition:
Private Sub SendAck(ByVal AppData As XDocument, ByVal Status As Boolean, ByVal StatusMessage As String, ByVal IsApplication As Boolean)
Why does the call have the parameters with the ":=". I'm just curious.
460
An operator is a symbol (e.g., = , + , > , & ) that causes VB.NET to take an action. That action might be an assignment of a value to a variable, the addition of two values, a comparison of two values, concatenation of strings, etc.
An expression is a collection of two or more terms that perform a mathematical or logical operation. The terms are usually either variables or functions that are combined with an operator to evaluate to a string or numeric result.
The ":=" in VB.Net is used to pass a function argument by name. The default is by position. It allows for parameters to be called in any order and determines the positioning based on name matches.
For example
Sub Example(ByVal param1 as Integer, ByVal param2 As Integer)
Console.WriteLine("{0} - {1}", param1, param2)
End Sub
Example(param2:=42, param1:=1) ' Prints "1 - 42"
Example(42, 1) ' Prints "42 - 1"
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