streamwriter in windows store app - write text to file in VB - vb.net

Question

Does anybody have VB code to emulate Streamwriter for Windows Store?
I know it's been replaced by StorageFolder class but there is no VB sample in MSDN and I can't seem to translate properly from c# examples. Any help would be appreciated. I am just trying to write text (CSV) to a file and save it to the documents folder. In the code below windows store want a stream instead of strPath when I try dim-ing a streamwriter. (been playing with pickerdialog too, but that might be the next hurdle).
Dim strpath As String = Windows.Storage.Pickers.PickerLocationId.DocumentsLibrary & "\" & strFileName
'Build String for file*******************
Dim swExport As StreamWriter = New StreamWriter(strpath)
swExport.Flush()
For x = 0 To intCount - 1
strLine = "WriteSomeText"
swExport.WriteLine(strLine)
Next x

Answer 1

Possibly the simplest approach would be to use a MemoryStream if you like StreamWriter, so something like:
Dim sessionData As New MemoryStream()
' TODO: stage data in sessionData
Dim swExport As StreamWriter = New StreamWriter(sessionData)
swExport.Flush()
For x = 0 To intCount - 1
strLine = "WriteSomeText"
swExport.WriteLine(strLine)
Next x
Dim file As StorageFile = await ApplicationData.Current.RoamingFolder.CreateFileAsync("towns.json", CreationCollisionOption.ReplaceExisting)
Using (fileStream As Stream = await file.OpenStreamForWriteAsync())
sessionData.Seek(0, SeekOrigin.Begin)
await sessionData.CopyToAsync(fileStream)
await fileStream.FlushAsync()
End Using

Answer 2

I was making it too difficult. To write to a file I just needed to use storagefolder and storagefile. I have also included the FileSavePicker in the code (note that filetypechoices is mandatory)
Private Async Function btnExport_Click(sender As Object, e As RoutedEventArgs) As Task
'Calls Filepicker to determine location
'Calls Sqlite to select ALL
'Creates CSV file to be saved at location chosen
'save to file
Dim intCount As Integer = "5"
Dim x As Integer
Dim strLine As String 'hold each line for export file
'Create FileName based on date
Dim strDate As String = Date.Today.ToString("MMddyyyy")
Dim strFileName As String = "Export" & strDate & ".csv"
' Configure save file dialog box
Dim dlgPicker As New Windows.Storage.Pickers.FileSavePicker
'add types for picker (manditory field)
Dim types = New List(Of String)
types.Add(".csv")
types.Add(".txt")
'set picker parameters
dlgPicker.SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.Downloads
dlgPicker.SuggestedFileName = strFileName '"Document" '
dlgPicker.FileTypeChoices.Add("CSV/TXT", types) 'manditory
dlgPicker.DefaultFileExtension = ".csv" 'Filter files by extension
dlgPicker.CommitButtonText = "Save"
' Show save file dialog box
Dim SaveCSV = Await dlgPicker.PickSaveFileAsync()
'************************get data************
Dim sbExport As Text.StringBuilder = New Text.StringBuilder
sbExport.AppendLine(strHeader)
For x = 0 To intCount - 1
strLine = "Get the text you want to write here"
sbExport.AppendLine(strLine)
Next x
'************************************
'write data to file
Await FileIO.WriteTextAsync(SaveCSV, sbExport.ToString)
Dim mb As MessageDialog = New MessageDialog("Done")
Await mb.ShowAsync()
End Function