C# Sharp Exercises: Create and write some line of text which does not contain a given string in a line
C# Sharp File Handling : Exercise-7 with Solution
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.
Sample Solution:-
C# Sharp Code:
using System;
using System.IO;
class WriteTextFile
{
static void Main()
{
string fileName = @"mytest.txt";
string[] ArrLines;
string str;
int n,i;
Console.Write("\n\n Create and write some line of text which does not contain a given string in a line :\n");
Console.Write("------------------------------------------------------------------------------------------\n");
if (File.Exists(fileName))
{
File.Delete(fileName);
}
Console.Write(" Input the string to ignore the line : ");
str = Console.ReadLine();
Console.Write(" Input number of lines to write in the file : ");
n= Convert.ToInt32(Console.ReadLine());
ArrLines=new string[n];
Console.Write(" Input {0} strings below :\n",n);
for(i=0;i<n;i++)
{
Console.Write(" Input line {0} : ",i+1);
ArrLines[i] = Console.ReadLine();
}
using (System.IO.StreamWriter file =
new System.IO.StreamWriter(@"mytest.txt"))
{
foreach (string line in ArrLines)
{
if (!line.Contains(str)) // write the line to the file If it doesn't contain the string in str
{
file.WriteLine(line);
}
}
}
using (StreamReader sr = File.OpenText(fileName))
{
string s = "";
Console.Write("\n The line has ignored which contain the string '{0}'. \n",str);
Console.Write("\n The content of the file is :\n",n);
Console.Write("----------------------------------\n");
while ((s = sr.ReadLine()) != null)
{
Console.WriteLine(" {0} ",s);
}
Console.WriteLine();
}
}
}
Sample Output:
Create and write some line of text which does not contain a given string in a line : ------------------------------------------------------------------------------------------ Input the string to ignore the line : easy Input number of lines to write in the file : 2 Input 2 strings below : Input line 1 : w3resource Input line 2 : it is easy tutorial The line has ignored which contain the string 'easy'. The content of the file is : ---------------------------------- w3resource
Flowchart :
C# Sharp Code Editor:
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