VB/C# Retrieval Collection problem

[PiggyBank1974]

Hi There,

 

I'm using the (Compact framework)

 

As I said previous I thought I would dabble in c# for my new project, and as I thought its turning out to be a nightmare :eek: I created this control in VB and now I'm porting it to c#.

 

In my control I have a PageListCollection (Similar to Listviews ListViewCollection)

 

Here is the VB version:

Public Class PageItemCollection
Private mPages As List(Of PageItem)
Private mPageList As PageList

 Public Sub New(ByVal oPageList As PageList)
  mPageList = oPageList
 End Sub

 Private ReadOnly Property Pages() As List(Of PageItem)
  Get
     If Me.mPages Is Nothing Then
       mPages = New List(Of PageItem)
     End If
     Return mPages
  End Get
 End Property

 Public Function Add(ByVal [Text] As String) As PageItem
 Dim mItem As New PageItem([Text])
  Pages.Add(mItem)
  Return mItem
 End Function

 Public Function Add(ByVal Item As PageItem) As PageItem
 Dim mItem As PageItem = Item
  Pages.Add(Item)
  Return mItem
 End Function

 Public ReadOnly Property Count() As Int32
  Get
     Return IIf(Pages Is Nothing, 0, Pages.Count)
  End Get
 End Property

 Public Sub Clear()
  Pages.Clear()
 End Sub

 Default Public ReadOnly Property Item(ByVal Index As Integer) As PageItem
  Get
     Return Pages.Item(Index)
   End Get
 End Property
End Class

 

And the C# Version

 

 public class PageItemCollection
 {
  private List<PageItem> mPages;
  private PageList mPageList;

  public PageItemCollection(PageList oPageList)
  {
   mPageList = oPageList;
  }

  public List<PageItem> Pages
  {
   get
   {
    if (this.mPages == null)
    {
     mPages = new List<PageItem>();
    }
    return mPages;
   }
  }

  public PageItem Add(string Text)
  {
   PageItem mItem = new PageItem(Text);
   Pages.Add(mItem);
   return mItem;
  }

  public PageItem Add(PageItem Item)
  {
   PageItem mItem = Item;
   Pages.Add(Item);
   return mItem;
  }

  public Int32 Count
  {
   get { return (Pages == null ? 0 : Pages.Count); }
  }

  public void Clear()
  {
   Pages.Clear();
  }

  public PageItem this[int32 Index]
  {
   get { return Pages[index]; }
  }
 }

 

The only real difference is I had to use this[index] in c# where as VB I can use .Item[index] or <object>[index]

 

So In my control I have this in VB

 

Private mPages As PageItemCollection

Public ReadOnly Property Pages() As PageItemCollection
 Get
    If (mPages Is Nothing) Then
      mPages = New PageItemCollection(Me)
    End If
    Return mPages
 End Get
End Property

 

So I can use it in VB like this:

 

<Control Object>.Pages[index] or <Control Object>.Pages.Item[index]

 

So In my control I have this in C#

 

 private PageItemCollection mPages;

 public PageItemCollection Pages
 {
  get
     {
      if ((mPages == null))
        {
         mPages = new PageItemCollection(this);
        }
      return mPages;
     }
 }

 

 

When I I try to access the items by index in C# I get the follow error

 

RegisterItem mItem = (RegisterItem)this.PageList1.Pages[this.PageList1.SelectedIndex];

 

Cannot apply indexing with [] to an expression of type 'MobileControls35.PageList.PageItemCollection

 

It all work great in VB.

[PlausiblyDamp]

Just copied and pasted your code into a new C# project (not the CF version however as I don't have that installed) and once I had created a couple of dummy classes for things like the PageList and PageItem everything seemed to work fine and I could happily use [] to index the objects.

 

Unless there is a difference between the CF and desktop versions of .Net regarding this I have no real idea where the problem could lie.