C # Methods for reading and writing files

17.3.1 read and write in text mode

The SteamReader and StreamWriter classes provide a way for us to read and write data in text mode. The following example reads the content from a text file and prints it on the screen.

Program Listing 17-5:

Using System;
Using System.IO;
Class Filetest
{public
 static void Main ()
 {
  StreamReader srd;
  try{
     srd=file.opentext ("C:\\c#\\file1\\file1.txt");
  }
  Catch
  {
   Console.WriteLine ("File Open Failed");
   return;
  }
  while (SRD. Peek ()!=-1)
  {
   String str=srd. ReadLine ();
   Console.WriteLine (str);
  Console.WriteLine ("The end of the file has been reached");
  Srd. Close ();
 }
}

The method used above OpenText is a static method of the file class and cannot be invoked by an instance of a specific file class. It represents reading a text stream from an existing text file and saving it in a StreamReader instance. The following example writes a text stream to a text file.

Program Listing 17-6:

Using System;
Using System.IO;
Class Filetest
{public
 static void Main ()
 {
  StreamWriter SRD;
  try{
    srd=file.createtext ("C:\\c#\\file1\\file2.txt");
  }
  Catch
  {
   Console.WriteLine ("File create Failed");
   return;
  }
  Srd. WriteLine ("Web address:");
  Srd. WriteLine ("www.bianceng.cn");
  Srd. WriteLine ("Www.263.net");
  Srd.writeline ("Www.microsoft.com/china");
  Srd. WriteLine ("www.sina.com.cn");
  Srd. Close ();
 }
}