Discovering a .net objects properties

[ASB]

Any pointer as to the easiest way to obtain a list of proptery names and values that are implemented in a .NET object. Basically all I want to is poulate a grid with the names and properties. Obviously I can write specific code for it but I have a load of different object so wanted to do something generic.

Object.GetType.GetProperties gets me an array of PropertyInfo.

PropertyInfo.Name gets me the name, .CanRead whther or not I can read it and .GetValue the value. What confuses me is how I deal with properties that have parameters. Can't seem to find anything too obvious on MSDN, but then I can only even find info I already know the answer to there.

[mcquiggd]

I presume you mean something declared like this:

Public Property TheProperty(ByVal theIndex as Integer, ByVal theValue As String) As String


I take it you are using VB.Net as C# doesnt seem to accept paramaterised properties per se; its possible with an indexer as a workaround, but you can only have one indexer per class in C#.

Look at ParameterInfo, and PropertyInfo.GetIndexProperties. The ParameterInfo has a Position property and this might help you build the correct array of Objects to pass in the third paramater of the SetValue mthod.

[ASB]

Cheers, that should get me on the right track.

[mcquiggd]

Heres a version in VB.Net to set the value of a Property that is a string Array
and accepts an Index as a paramater:


Imports System.Reflection

Public Class TargetClass

Private _theArray(10) As String

Public Property MyProp(ByVal theIndex As Integer)
Get
Return (_theArray(theIndex))
End Get
Set(ByVal Value)
_theArray(theIndex) = Value
End Set
End Property

End Class


Public Class PropertyUpdater

Public Sub SetProperties(ByRef targetObject As Object, ByVal index() As Object, ByVal newValue As String)

Dim targetType As Type = targetObject.GetType
Dim props() As PropertyInfo
Dim prop As PropertyInfo

props = targetType.GetProperties

For Each prop In props

prop.SetValue(targetObject, newValue, index)

Next

End Sub

End Class

This would be called by:

Private targetObject As New TargetClass
Private updater As New PropertyUpdater
Private the index as Integer

theIndex = Integer.Parse(TextBoxIndex.Text)

updater.SetProperties(targetObject, New Object() {theIndex}, TextBoxNewValue.Text)

TextBoxCurrentValue.Text = targetObject.MyProp(theIndex)




Obviously you wouldnt really loop through all the PropertyInfos, you would just use GetProperty instead of GetProperties but you get the picture...

[ASB]

Cheers.