56 lines
2.1 KiB
C#
56 lines
2.1 KiB
C#
|
using System;
|
||
|
|
using System.IO;
|
||
|
|
using System.Text;
|
||
|
|
|
||
|
|
class filexercise3
|
||
|
|
{
|
||
|
|
public static void Main()
|
||
|
|
{
|
||
|
|
string fileName = @"mytest.txt";
|
||
|
|
try
|
||
|
|
{
|
||
|
|
// Delete the file if it exists.
|
||
|
|
if (File.Exists(fileName))
|
||
|
|
{
|
||
|
|
File.Delete(fileName);
|
||
|
|
}
|
||
|
|
Console.Write("\n\n Append some text to an existing file :\n");
|
||
|
|
Console.Write("--------------------------------------------\n");
|
||
|
|
// Create the file.
|
||
|
|
using (StreamWriter fileStr = File.CreateText(fileName))
|
||
|
|
{
|
||
|
|
fileStr.WriteLine(" Hello and Welcome");
|
||
|
|
fileStr.WriteLine(" It is the first content");
|
||
|
|
fileStr.WriteLine(" of the text file mytest.txt");
|
||
|
|
}
|
||
|
|
using (StreamReader sr = File.OpenText(fileName))
|
||
|
|
{
|
||
|
|
string s = "";
|
||
|
|
Console.WriteLine(" Here is the content of the file mytest.txt : ");
|
||
|
|
while ((s = sr.ReadLine()) != null)
|
||
|
|
{
|
||
|
|
Console.WriteLine(s);
|
||
|
|
}
|
||
|
|
Console.WriteLine("");
|
||
|
|
}
|
||
|
|
using (System.IO.StreamWriter file = new System.IO.StreamWriter(@"mytest.txt", true))
|
||
|
|
{
|
||
|
|
file.WriteLine(" This is the line appended at last line.");
|
||
|
|
}
|
||
|
|
using (StreamReader sr = File.OpenText(fileName))
|
||
|
|
{
|
||
|
|
string s = "";
|
||
|
|
Console.WriteLine(" Here is the content of the file after appending the text : ");
|
||
|
|
while ((s = sr.ReadLine()) != null)
|
||
|
|
{
|
||
|
|
Console.WriteLine(s);
|
||
|
|
}
|
||
|
|
Console.WriteLine("");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
catch (Exception MyExcep)
|
||
|
|
{
|
||
|
|
Console.WriteLine(MyExcep.ToString());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|