49 lines
1.7 KiB
C#
49 lines
1.7 KiB
C#
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using System;
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using System.IO;
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using System.Text;
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class filexercise11
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{
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public static void Main()
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{
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string fileName = @"mytest.txt";
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try
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{
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// Delete the file if it exists.
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if (File.Exists(fileName))
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{
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File.Delete(fileName);
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}
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Console.Write("\n\n Read the first line from a file :\n");
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Console.Write("---------------------------------------\n");
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// Create the file.
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using (StreamWriter fileStr = File.CreateText(fileName))
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{
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fileStr.WriteLine(" test line 1");
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fileStr.WriteLine(" test line 2");
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fileStr.WriteLine(" Test line 3");
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}
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using (StreamReader sr = File.OpenText(fileName))
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{
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string s = "";
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Console.WriteLine(" Here is the content of the file mytest.txt : ");
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while ((s = sr.ReadLine()) != null)
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{
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Console.WriteLine(s);
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}
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Console.WriteLine("");
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}
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Console.Write("\n The content of the first line of the file is :\n");
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if (File.Exists(fileName))
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{
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string[] lines = File.ReadAllLines(fileName);
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Console.Write(lines[0]);
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}
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Console.WriteLine();
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}
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catch (Exception MyExcep)
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{
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Console.WriteLine(MyExcep.ToString());
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}
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}
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}
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