CS2. NET to simplify access to text files using foreach. _ Practical Tips

Many times, we always access text files in the same way as rows, and using a foreach statement can greatly simplify access logic: for example:
foreach (string line in New Linereader ("C:\abc.txt"))
Console.WriteLine (line);
The complete 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 ignoreblanklines): This (new FileStream (file, FileMode.Open, Filea Ccess. Read, FileShare.Read), encoding, Ignoreblanklines)
{
}
Public Linereader (Stream stream, Encoding Encoding): This (stream, Encoding, false)
{
}
Public Linereader (Stream stream, Encoding Encoding, bool ignoreblanklines): This (new StreamReader (Stream, Encoding), IGN Oreblanklines)
{
}
Public Linereader (TextReader reader): This (reader, false)
{
}
TextReader Mreader;
BOOL Mignoreblanklines;
Public Linereader (TextReader reader, BOOL ignoreblanklines)
{
Mreader = reader;
Mignoreblanklines = Ignoreblanklines;
Mcurrent = null;
}
Public Linereader GetEnumerator ()
{
return this;
}
public void Reset ()
{
throw new NotSupportedException ("Linereaderö»äü¶áè¡ò»´î");
}
String mcurrent;
public string Current
{
Get
{
return mcurrent;
}
}
public bool MoveNext ()
{
Todo
{
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
ººxöabc123!@#
End of text! ";
[Test]
public void Readfromreader ()
{
Dotest (New Linereader) (New StringReader (Testlines));
}
[Test]
public void ReadFromFile ()
{
string file = Path.gettempfilename ();
Try
{
Stringutil.savetofile (testlines, File, encoding.getencoding ("gb2312"));
Dotest (New Linereader (File, encoding.getencoding ("gb2312"));
}
Finally
{
Fileutil.safedelete (file);
}
}
[Test]
public void ReadFromStream ()
{
string file = Path.gettempfilename ();
Try
{
Stringutil.savetofile (testlines, File, encoding.getencoding ("gb2312"));
using (Stream stream = new FileStream (file, FileMode.Open))
Dotest (new Linereader (Stream, encoding.getencoding ("gb2312"));
}
Finally
{
Fileutil.safedelete (file);
}
}
void Dotest (Linereader reader)
{
StringBuilder sb = new StringBuilder ();
foreach (string line in reader)
Sb. Append (line + Environment.NewLine);
Assert.AreEqual (Testlines + Environment.NewLine, sb.) ToString ());
}
[Test]
public void Ignoreblankline ()
{
foreach (string line in New Linereader (new StringReader (Testlines), true)
Assert.istrue (line. Length!= 0);
}
}
}