> I'm reading a file line by line using
>
> line = StreamReader.ReadLine
>
> and normally I
>
> Do While Not line = Nothing
>
> But, this file has a lot of blank lines.  How do I determine if I'm at
> the end of the file when there are lots of blank lines in the file?
>

> Hello cj,
>
> a blank line should have a value of string.empty, the EOF should have a
> value of Nothing.
>
> -Boo
>
>> I'm reading a file line by line using
>>
>> line = StreamReader.ReadLine
>>
>> and normally I
>>
>> Do While Not line = Nothing
>>
>> But, this file has a lot of blank lines.  How do I determine if I'm at
>> the end of the file when there are lots of blank lines in the file?
>>
>
>

> you could also do
>
> Dim sr As New StreamReader(...)
>
> While sr.Peek > -1
>
> SomeStringVariable = sr.ReadLine()
>
> End While
>

> "cj" <cj@nospam.nospam> schrieb:
>> I'm reading a file line by line using
>>
>> line = StreamReader.ReadLine
>>
>> and normally I
>>
>> Do While Not line = Nothing
>>
>> But, this file has a lot of blank lines.  How do I determine if I'm at
>> the end of the file when there are lots of blank lines in the file?
>
> Use 'Do While Line IsNot Nothing' or 'Do While Not Line Is Nothing'.
>

> Hi cj,
>
> It's because Visual Basic runtime usually evaluates Nothing as an empty
> string (""). Following code prints "True":
>
>     Dim s As string = ""
>     Console.WriteLine(s = Nothing)
>    
> Since StreamReader.ReadLine() returns null when the file reaches to end, we
> need to use Is or IsNot operator to determine whether or not an object is
> null.
>
> For more information, please refer to following MSDN Library:
>
> #Is Operator (Visual Basic)
> http://msdn2.microsoft.com/en-us/library/kb136x1y.aspx
>
> #IsNot Operator
> http://msdn2.microsoft.com/en-us/library/t3bat82c.aspx
>
> #Nothing and Strings in Visual Basic
> http://msdn2.microsoft.com/en-us/library/ms233957.aspx
>
> Please reply to let us know whether or not you need further information.
> Thank you.
>
> Sincerely,
> Walter Wang (waw***@online.microsoft.com, remove 'online.')
> Microsoft Online Community Support
>
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