Web User Control property loses value on postback

I have a user control that seems to lose its property values on postback.  In the control, I have a property thats a datatable that populates a radiobutton list.  On the outside page, I've passed in the datatable by setting the property directly and by creating a method that sets in internally.  The control has a method that checks the selected value of the radiobutton list against the datatable and returns back a boolean.  Problem is when I call the function, the datatable is nothing. Below are the functions inside my user control.  Is there something about properties I'm missing? Thanks.

Sub Initialize(ByVal dt As dsPractice.viewPracticeQuestionsDataTable)
  DataSource = dt
  //Extra Code
End Sub

Private dtPracticeQuestions As dsPractice.viewPracticeQuestionsDataTable
Public Property DataSource() As dsPractice.viewPracticeQuestionsDataTable
Return Me.dtPracticeQuestions
End Get
  Set(ByVal value As dsPractice.viewPracticeQuestionsDataTable)
Me.dtPracticeQuestions = value
End Set
End Property

Function IsCorrect() As Boolean
Dim dt As dsPractice.viewPracticeQuestionsDataTable = DataSource
  //Check selected value against dt, but dt is nothing
End Function

3/5/2008 5:05:10 PM
asp.net.web-forms 93655 articles. 5 followers. Follow

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I've figured out what I was missing.  I set the propertys with viewstates and they are now persistant.

Public Property DataSource() As dsPractice.viewPracticeQuestionsDataTable
Return ViewState("dtPQ")
  End Get
Set(ByVal value As dsPractice.viewPracticeQuestionsDataTable)
"dtPQ") = value
End Set
End Property

3/5/2008 5:48:17 PM

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