Parse Log File - Reading from the end first - vb.net

Question

Having some trouble with a log file I need to parse and display certain fields in a data grid view. The log file is a large tab delimited file and I can read it and parse the array easily. The issue is that I want to start at the END of the file and read backwards until I hit a certain value in one of the fields. Then I want to start reading forward again until it hits the end of the file. While it's reading to the end I want it to fill the data grid view with certain fields. Here's what I have so far -
Looking at the code - it needs to read from the end until the 4th field equals zero and then start reading forward again. I can also read from the end, saving the values to the data grid view as I go until I hit that 0 if that's easier.
Thanks for the help!
The other option would be to read the file and save it in reverse, line by line - the last line first, the 2nd to last line 2nd, etc. That would be really nice as I have another function that will need to read the file and it also needs to go from the end to the beginning.
Private Sub btnParseLog_Click(sender As Object, e As EventArgs) Handles btnParseLog.Click
Dim FileLocation As String = "BLAHBLAHBLAH"
Dim LogFile As String = "LOGFILE"
DataGridView1.ColumnCount = 3
DataGridView1.ColumnHeadersVisible = True
' Set the column header style.
Dim columnHeaderStyle As New DataGridViewCellStyle()
columnHeaderStyle.BackColor = Color.Beige
columnHeaderStyle.Font = New Font("Verdana", 10, FontStyle.Bold)
DataGridView1.ColumnHeadersDefaultCellStyle = columnHeaderStyle
DataGridView1.Columns(0).Name = "User"
DataGridView1.Columns(1).Name = "Number"
DataGridView1.Columns(2).Name = "Time"
Using MyReader As New Microsoft.VisualBasic.FileIO.TextFieldParser(LogFile)
MyReader.TextFieldType =
Microsoft.VisualBasic.FileIO.FieldType.Delimited
MyReader.Delimiters = New String() {vbTab}
Dim TotalLineCount As Integer = File.ReadAllLines(LogFile).Length
Dim currentRow As String()
Dim RowCount As Integer = 0
'Loop through all of the fields in the file.
'If any lines are corrupt, report an error and continue parsing.
While Not MyReader.EndOfData
Try
currentRow = MyReader.ReadFields()
RowCount = RowCount + 1
' Include code here to handle the row.
If RowCount = TotalLineCount Then
While Not currentRow(4).ToString = 0
DataGridView1.Rows.Add(currentRow(1).ToString, currentRow(4).ToString, currentRow(7).ToString)
RowCount = RowCount - 1
End While
End If
Catch ex As Microsoft.VisualBasic.FileIO.MalformedLineException
MsgBox("Line " & ex.Message &
" is invalid. Skipping")
End Try
End While
End Using
End Sub