Csharp/C Sharp by API/System.IO/StreamReader — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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Текущая версия на 15:12, 26 мая 2010
Содержание
new StreamReader(FileStream fs)
<source lang="csharp">
using System; using System.IO; class MainClass {
public static void Main(string[] args) { try { FileStream fs = new FileStream("c:\\a.txt", FileMode.Open); StreamReader sr = new StreamReader(fs); string line = ""; int lineNo = 0; do { line = sr.ReadLine(); if (line != null) { Console.WriteLine("{0}: {1}", lineNo, line); lineNo++; } } while (line != null); } catch (Exception e) { Console.WriteLine("Exception in ShowFile: {0}", e); } }
}
</source>
new StreamWriter(fs, Encoding.UTF8)
<source lang="csharp"> using System; using System.IO; using System.Text; class MainClass {
static void Main() { using (FileStream fs = new FileStream("test.txt", FileMode.Create)) { using (StreamWriter w = new StreamWriter(fs, Encoding.UTF8)) { w.WriteLine(124.23M); w.WriteLine("Test string"); w.WriteLine("!"); } } using (FileStream fs = new FileStream("test.txt", FileMode.Open)) { using (StreamReader r = new StreamReader(fs, Encoding.UTF8)) { Console.WriteLine(Decimal.Parse(r.ReadLine())); Console.WriteLine(r.ReadLine()); Console.WriteLine(Char.Parse(r.ReadLine())); } } }
}
</source>
new StreamWriter(String filePath)
<source lang="csharp"> using System; using System.IO;
public class MyStreamWriterReader {
static void Main(string[] args) { StreamWriter writer = new StreamWriter("reminders.txt"); writer.WriteLine("..."); writer.WriteLine("Don"t forget these numbers:"); for (int i = 0; i < 10; i++) writer.Write(i + " "); writer.Write(writer.NewLine); writer.Close(); StreamReader sr = new StreamReader("reminders.txt"); string input = null; while ((input = sr.ReadLine()) != null) { Console.WriteLine(input); } }
}
</source>
StreamReader.Peek()
<source lang="csharp"> using System; using System.IO;
public class StrmRdr { static public void Main (string [] args) { FileStream strm; StreamReader reader; strm = new FileStream ("test.txt", FileMode.Open, FileAccess.Read); reader = new StreamReader (strm); while (reader.Peek() >= 0) { string text = reader.ReadLine (); Console.WriteLine (text); } reader.Close (); strm.Close (); } } </source>
StreamReader.ReadLine()
<source lang="csharp"> using System; using System.Collections.Generic; using System.Text; using System.IO; class Program {
static void Main(string[] args) { string strLine; try { FileStream aFile = new FileStream("Log.txt", FileMode.Open); StreamReader sr = new StreamReader(aFile); strLine = sr.ReadLine(); while (strLine != null) { Console.WriteLine(strLine); strLine = sr.ReadLine(); } sr.Close(); } catch (IOException e) { Console.WriteLine("An IO exception has been thrown!"); Console.WriteLine(e.ToString()); return; } }
}
</source>
StreamReader.ReadToEnd()
<source lang="csharp"> using System; using System.IO;
public class StreamReaderAndWriter { static void Main(string[] args) { StreamReader MyStreamReader = new StreamReader(@"c:\Testing.txt"); FileStream MyFileStream = new FileStream(@"c:\Testing.txt", FileMode.Open, FileAccess.Read, FileShare.None); StreamReader MyStreamReader2 = new StreamReader(MyFileStream); MyFileStream.Close(); MyStreamReader2.Close(); string MyStringReader = MyStreamReader.ReadLine(); string MyStringReadToEOF = MyStreamReader.ReadToEnd(); int[] MyArrayOfCharacters = new int[100]; for (int i = 0; i < 99; i++) { MyArrayOfCharacters[i] = MyStreamReader.Read(); } MyStreamReader.Close(); } } </source>