C# Sharp Exercises: Append some text to an existing file
C# Sharp File Handling : Exercise-8 with Solution
Write a program in C# Sharp to append some text to an existing file.
Sample Solution:-
C# Sharp Code:
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());
}
}
}
Sample Output:
Append some text to an existing file : -------------------------------------------- Here is the content of the file mytest.txt : Hello and Welcome It is the first content of the text file mytest.txt Here is the content of the file after appending the text : Hello and Welcome It is the first content of the text file mytest.txt This is the line appended at last line.
Flowchart :
C# Sharp Code Editor:
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Previous: Write a program in C# Sharp to create and write some line of text into a file which does not contain a given string in a line.
Next: Write a program in C# Sharp to create and copy the file to another name and display the content.
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