[RESOLVED] [2008] Array.IndexOf always returns -1

[Adrian26]

I am having trouble with the following piece of code, the searchIndex always returns -1. If I put a breakpoint after 'searchIndex = Array.IndexOf(buffer, &H90)' and look in the buffer array I can see 90h so it should return the index but it doesn't.

This code is in my serialport DataReceived sub

Any help would be great!

Thanks

Dim searchIndex As Integer
        Dim buffer() As Byte = New Byte() {}
        Dim bytesRead As Integer
        bytesRead = SerialPort.BytesToRead ' Get how many bytes available.
        Array.Resize(buffer, bytesRead) ' Set the buffer to the number of bytes available.
        bytesRead = SerialPort.Read(buffer, 0, bytesRead) ' Read the bytes
        If bytesRead > 0 Then
            searchIndex = Array.IndexOf(buffer, &H90)
            If searchIndex <> -1 AndAlso buffer(searchIndex + 1) = &H90 Then
                If (searchIndex + 18) <= buffer.Length Then
                    For x As Integer = searchIndex To (searchIndex + 18)
                        Debug.WriteLine(buffer(x).ToString)
                    Next
                End If
            End If
        End If

[dbasnett]

        Dim buffer() As Byte = New Byte() {1, 2, 10, 11}
        Dim lk4 As Byte = &HA
        Dim iof As Integer = Array.IndexOf(buffer, lk4)

your code looks like something i have seen b4.

[Adrian26]

Yes I think you may have

searchIndex now returns correctly, thanks

[dbasnett]

remember to mark thread resolved, etc.