Many times, we always access text files in a row, using the Foreach statement to greatly simplify access logic: for example:
Console.Writeline (LINE);
The full code is as follows:
Using system;
Using system.io;
Using system.text;
Using system.collections;
Namespace forks.utils.io
{
Public struct LineReader: IDisposable
{
Public LineReader (String File, Encoding Encoding): this (file, encoding, false)
{
}
Public LineReader (String File, Encoding Encoding, Bool IgnorebLines): This (New Filestream (File, FileMode.open, FileAccess.Read, Fileshare.Read), Encoding, IgnorebLines
{
}
Public LineReader (stream stream, eNCoding): this (stream, encoding, false)
{
}
Public LineReader (Stream Stream, Encoding Encoding, Bool IgnoreBLines): This (New Stream, Encoding), IgnoreBlanklines
{
}
Public LineReader: this (Reader, False)
{
}
TextReader MReader;
Bool mignoreblankline;
Public LineReader (TextReader Reader, Bool IgnoreBlanklines)
{
MREADER = Reader;
MIGNOREBLANKLINES = IGNOREBLANKLINES;
McURRENT = NULL;
}
Public LineReader geteNumerator ()
{
Return this;
}
Public void reset ()
{
Throw New NotSupportedException ("LineReaderö» Äܶáá¡¡ò »'î");
}
String mcurrent;
Public String Current, PUBLIC STRING CURRENT
{
get
{
Return McURRENT;
}
}
Public bool movenext ()
{
DO
{
McURRENT = MREADER.READLINE ();
WHILE (MIGNOREBLANKLINES & MCURRENT! = null && mcurrent.length == 0);
Return McURRENT! = NULL;
}
Public void dispose ()
{
MREADER.CLOSE ();
}
}
}
Test code:
Using system;
Using system.io;
Using system.text;
Using nunit.framework;
Using forks.test;
Namespace forks.utils.io
{
[TestFixTure]
Public class linereadertest {
Const string testlines = @ "ABC ASD EWR AFA E
Start with blanks
End with blanks
O × öabc123! @ #
END OF TEXT! "
[TEST]
Public void readfromreader ()
{
New LineReader (New StringReader (Testlines));
}
[TEST]
Public void readfromfile ()
{
String file = path.getTempFileName ();
Try
{
Stringutil.savetofile (Testline, File, Encoding.Getencoding ("GB2312"));
Dotest (New LineReader (File, Encoding.Getencoding);
}
Finally
{
Fileutil.safedeete (file);
}
}
[TEST]
Public void readfromstream ()
{
String file = path.getTempFileName ();
Try
{
Stringutil.savetofile (Testline, File, Encoding.Getencoding ("GB2312"));
USING (Stream Stream = New FileStream (File, FileMode.Open))
Dotest (New LineReader (stream, eNCoding.getencoding)))
}
Finally
{
Fileutil.safedeete (file);
}
}
Void Dotest (LineReader Reader)
{
Stringbuilder SB = New StringBuilder ();
FOREACH (String Line in Reader)
sb.append (line environment.newline);
AskERT.Arequal (Testlines Environment.newline, sb.tostring ());
}
[TEST]
Public void ignoreblankline ()
{
FOREACH (String Line in New LineRead (New StringReader (Testlines), TRUE)
AskERT.ISTRUE (Line.Length! = 0);
}
}
}
