LoadControl and using GetType.InvokeMember

I am afraid it fails, with
Object reference not set to an instance of an object.

When I look at x.GetType().GetProperty("abc"). it contain nothing

Thanks

Jetforce

what exactly are you trying to do in the first place, this call seems pretty crazy!

I want to take an xml file/string and load a page dynamically, I will be building some usercontrols and need set their properties dynamically, the values will be coming from the xml .

 Does that sound pretty crazy???

Basically, this will allow us to white label a site

Thanks

Jetforce

if..

           'This works
            x.abc = "kljkjkj"

why not just use that?  I guess I'm just ignorant and don't know what this GetType().InvokeMember is doing.  I've never seen it used in all my experience with asp.net...

This will not work, as I am building the controls dynamically, I will not know which properties/methods etc until at runtime.
The InvokeMember allows this at runtime. (Except when dealing with usercontrols it seems).
 I want generic code, so if I add another usercontrol at a later date, I will not have to check all the properties for this control and this avoids a recompile.

Thanks

Jetforce

I just hate late-binding and think it should always be avoided if possible.  Could you create a base class for all your usercontrols to inherit from? then just cast to that so you can early bind the properties?  Any new usercontrols you add would just need to inherit from this base class.  Since inheritance is an "IS-A" relationship, you can always cast to the parent class

Public Class MyBaseUserControl : Inherits System.Web.UI.UserControl
  Public Property abc as string
    Get
       ...
    End Get
    Set
      ...
    End Set
  End Property
End Class

Dim x As MyBaseUserControl
x = CType(LoadControl("usercontrols\information.ascx"), MyBAseUserControl)

x.abc = "blahblah"

raterus,

  I think you are missing a key point, I will not know what properties are available until run-time, this will come from the XML file.
 I would have to check all the XML elements and condition the settings (probably via a select case statement).

 Using your suggested method, I will be late binding via polymorphisming. I do not see any difference. I may be missing something?

Thanks

Jetforce

well, I consider it early binding, but it is polymorphism.  Anyway, I see what you are doing, so it won't work.

Can you give me an example of the usercontrol's class, where "abc" is defined?

Also, just a clarification, shouldn't your original statement read like this?
x.GetType().InvokeMember("abc", BindingFlags.DeclaredOnly Or BindingFlags.Public Or BindingFlags.NonPublic Or BindingFlags.Instance Or BindingFlags.SetField Or BindingFlags.SetProperty, Nothing, x, New Object() {"kljkjkj"})

raterus,
     here is the code for the control, it was being used as a test. The user control contails one label control. As for your second remark, I believe your code is exactly as my first post except for the text

Thanks

Jetforce



Public Class Information
    Inherits System.Web.UI.UserControl

    Private m_abc As String

#Region " Web Form Designer Generated Code "

    'This call is required by the Web Form Designer.
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

    End Sub
    Protected WithEvents Label1 As System.Web.UI.WebControls.Label


    'NOTE: The following placeholder declaration is required by the Web Form Designer.
    'Do not delete or move it.
    Private designerPlaceholderDeclaration As System.Object

    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: This method call is required by the Web Form Designer
        'Do not modify it using the code editor.
        InitializeComponent()
    End Sub

#End Region
     Public Property ABC() As String
        Get
            Return m_abc
        End Get
        Set(ByVal Value As String)
            m_abc = Value
        End Set
    End Property
    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'Put user code to initialize the page here
        Me.Label1.Text = m_abc
    End Sub