Question

I am using threads to read from a file and process content. I have the following code:

Dim line As String = Nothing
Dim result As String = Nothing
Dim solved As Boolean
While strReader.EndOfStream <> True
    SyncLock strReader
        line = strReader.ReadLine()
        result = "ERROR"
    End SyncLock
    solved = False
    While solved = False
        result = Process(line)
        If Not result.Contains("ERROR") Then
            solved = True
        End If
    End While
    //some code
End While

and it gives me that error at line: If Not result.Contains(“ERROR”) Then

with labels works fine but I read that they are bad for coding.

How can I get rid of this error? What am I doing wrong?

Thanks!

Answer 1

The error pretty much says it all

Process(line) 

Is returning a null value. Fix Process() to return a non-null value.

Alternately you could do this

If not result is nothing then 
  solved = not result.Contains("ERROR")
End if