Strange DataView Problem

Hello,

I need some clarification about a stange DataView behaviour I have noticed. I am developing a dynamic website that is binding data (from an Access db) to a datagrid. I use a cached dataset to save trips to the db, here is the code...

'populate the Cache Variable that stores the Web Content Dataset
 Public Function PopulateWebContentDataset(Optional ByVal blnRepopulate As Boolean = False) As Boolean
 Dim ds As New DataSet()
 'check if cached dataset already exists
 If Current.Cache("WebContent") Is Nothing = False Then
 'the cached variable already exists
 Return True
 End If
 'get the Web Content from the database
 Dim cn As New OleDbConnection(AppSettings("cnStringWebContent"))
 Dim da As New OleDbDataAdapter("SELECT * FROM tblWebContent", cn)
 Try
 'fill the Web Content dataset with records from the database
 da.Fill(ds, "tblWebContent")
 If ds.Tables("tblWebContent").Rows.Count > 0 Then
 'add the dataset to the cache
 Current.Cache.Insert("WebContent", ds, _
 New System.Web.Caching.CacheDependency(AppSettings("dbPathWebContent")), _
 DateTime.Now.AddDays(1), Current.Cache.NoSlidingExpiration, _
 System.Web.Caching.CacheItemPriority.Normal, Nothing)
 Return True
 Else
 'no records were found
 Current.Cache.Remove("WebContent")
 Current.Cache("WebContent") = Nothing
 Return False
 End If
 Catch DefaultExc As Exception
 Finally
 cn.Dispose()
 da.Dispose()
 ds.Dispose()
 End Try
 End Function
 Public Function BindPageContent(ByRef dgr As DataGrid, ByVal strPage As String, _
 Optional ByVal blnRepopulate As Boolean = False) As Boolean
 'check if the cache Web Content dataset already exists
 If PopulateWebContentDataset(blnRepopulate) = False And blnRepopulate = False Then
 'unable to get the information from the database
 Return False
 End If
 Dim ds As DataSet
 Dim dv As New DataView()
 Try
 ds = Current.Cache("WebContent")
 'ds.Tables("tblWebContent").DefaultView.RowFilter = "Page=" & "'" & strPage & "'"
 dv = ds.Tables("tblWebContent").DefaultView
 dv.RowFilter = "Page=" & "'" & strPage & "'"
 dgr.DataSource = dv
 dgr.DataBind()
 Catch DefaultExc As Exception
 Finally
 ds.Dispose()
 dv.Dispose()
 End Try
 End Function

My question is, the above code works perfectly the first time the page loads but when I return to this specific page (which should be getting the cached dataset), nothing is displayed. I checked the dataset and it has the correct amount of rows, however, the dataview has a rowcount of 0 (when it previously had a rowcount of 1).

I have done the following to fix this problem, all of which have worked...
1. Instead of getting the dataset from the cache, I connected to the db on each page_load and repopulated the dataset
2. When I bind the datagrid using the dataset as the datasource instead of the dataview, it works...

(ds.tables("tblWebContent").defaultview.rowfilter="Page='" & strPage & "'")

3. When I take out dv.dispose, everything works as expected

I have many instances in my code where I use the exact same code as posted above and it doesn't seem like there is a problem with the DataView. Should I re-examine all my code and remove dataview.dispose()? Does anyone have any suggestions on why this may be happening?Indeed, you shouldn't dispose that object since it's needed when the page execution is done further to display the data on the web form. In fact, it's a strange problem for me too but I would never dispose the dataview... Remember, the dataset object is a disconnected object which doesn't need any connection whatsoever with the database.