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loop through properties?

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Join Date: Jan 2008

Posts: 56

Reputation: Tekito is an unknown quantity at this point

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Tekito

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loop through properties?

Nov 26th, 2008

I'm not quite sure how to tackle this problem. I have a form that displays the properties of a class. I have events for all the properties so the form gets updated automatically when the properties change. However, upon initializing a class, these events do not get called, and so the form starts out blank. What is the best way to program so that when I have a new class, the form displays the class's properties immediately?

(One idea I had was to loop through the properties and call each event... is there a way to loop through class properties in .NET?)

Last edited by Tekito; Nov 26th, 2008 at 12:55 pm.

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Join Date: Nov 2008

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Reputation: 4advanced is an unknown quantity at this point

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4advanced

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Re: loop through properties?

Nov 26th, 2008

Sure you can, see the implementation below. This example is a copy/paste code from my project in which I added a class "ValidationInstance" which holds a collection of items which should be checked (or préfilled before the handler IsValid will be raisen).

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Dim iPropertyCount As Integer = 0
        For Each PropertyItem As PropertyInfo In yourClass.GetType().GetProperties()
            Select Case iPropertyCount
                Case 1 To 10
                    'add the properties of this class to then validation instance

                    Dim strToAdd As String = String.Empty
                    If Not PropertyItem.GetValue(yourClass, Nothing) = Nothing Then
                        strToAdd = PropertyItem.GetValue(yourClass, Nothing).ToString()
                    End If
                    yourClass.ValidationInstance.ValidateRequired(PropertyItem.Name, _
                                                        strToAdd.ToString)

            End Select

            iPropertyCount += 1
        Next

Last edited by 4advanced; Nov 26th, 2008 at 2:09 pm.