Reflection - SetValue of array within class?
- by Jaymz87
OK, I've been working on something for a while now, using reflection to accomplish a lot of what I need to do, but I've hit a bit of a stumbling block...
I'm trying to use reflection to populate the properties of an array of a child property... not sure that's clear, so it's probably best explained in code:
Parent Class:
Public Class parent
Private _child As childObject()
Public Property child As childObject()
Get
Return _child
End Get
Set(ByVal value As child())
_child = value
End Set
End Property
End Class
Child Class:
Public Class childObject
Private _name As String
Public Property name As String
Get
Return _name
End Get
Set(ByVal value As String)
_name = value
End Set
End Property
Private _descr As String
Public Property descr As String
Get
Return _descr
End Get
Set(ByVal value As String)
_descr = value
End Set
End Property
End Class
So, using reflection, I'm trying to set the values of the array of child objects through the parent object...
I've tried several methods... the following is pretty much what I've got at the moment (I've added sample data just to keep things simple):
Dim Results(1) As String
Results(0) = "1,2"
Results(1) = "2,3"
Dim parent As New parent
Dim child As childObject() = New childObject() {}
Dim PropInfo As PropertyInfo() = child.GetType().GetProperties()
Dim i As Integer = 0
For Each res As String In Results
Dim ResultSet As String() = res.Split(",")
ReDim child(i)
Dim j As Integer = 0
For Each PropItem As PropertyInfo In PropInfo
PropItem.SetValue(child, ResultSet(j), Nothing)
j += 1
Next
i += 1
Next
parent.child = child
This fails miserably on PropItem.SetValue with ArgumentException: Property set method not found.
Anyone have any ideas?
@Jon :-
Thanks, I think I've gotten a little further, by creating individual child objects, and then assigning them to an array... The issue is now trying to get that array assigned to the parent object (using reflection).
It shouldn't be difficult, but I think the problem comes because I don't necessarily know the parent/child types. I'm using reflection to determine which parent/child is being passed in. The parent always has only one property, which is an array of the child object. When I try assigning the child array to the parent object, I get a invalid cast exception saying it can't convert Object[] to .
EDIT:
Basically, what I have now is:
Dim PropChildInfo As PropertyInfo() = ResponseObject.GetType().GetProperties()
For Each PropItem As PropertyInfo In PropChildInfo
PropItem.SetValue(ResponseObject, ResponseChildren, Nothing)
Next
ResponseObject is an instance of the parent Class, and ResponseChildren is an array of the childObject Class.
This fails with:
Object of type 'System.Object[]' cannot be converted to type 'childObject[]'.
