How to remove text from a specific line in file without creating unwanted space using c#?
I'm trying to remove text from a specific line in the file that i have created "Test.txt".
Here is the text written in Test.txt:
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
Now what i want to happen is when i'm going to remove 2 - 4 in the 2nd iteration, the output should be like this:
1
2
3
4
5
1
5
1
2
3
4
5
What i want is to remove only spaces that the corresponding text was removed from and preferably without involving other spaces.
But when i tried the code it gave me this output:
1
2
3
4
5
1
5
1
2
3
4
5
As you can see the above output, that is the unwanted space that i'm talking about. Below is the code that I have tried:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace TestCode
{
class Program2
{
static void Main()
{
lineChanger("", @"C:\Users\User1\Documents\Visual Studio 2015\WebSites\MusicStore\Pages\Test.txt", 8);
lineChanger("", @"C:\Users\User1\Documents\Visual Studio 2015\WebSites\MusicStore\Pages\Test.txt", 9);
lineChanger("", @"C:\Users\User1\Documents\Visual Studio 2015\WebSites\MusicStore\Pages\Test.txt", 10);
}
static void lineChanger(string newText, string fileName, int line_to_edit)
{
string[] arrLine = File.ReadAllLines(fileName);
arrLine[line_to_edit - 1] = newText;
File.WriteAllLines(fileName, arrLine);
}
}
}
Also please feel free to suggest any proper techniques and kindly include actual examples.
Please see is this ok?
int removeAt = 7; //or any thing you want
int linesToRemove = 3; //or any thing you want
string s = System.IO.File.ReadAllText("Test.txt");
List<string> arr = s.Split("\n".ToCharArray()).ToList();
for (int i = 0; i < linesToRemove; i++)
arr.RemoveAt(removeAt);
string result = "";
foreach (string str in arr)
{
result += str;
}
System.IO.File.WriteAllText("Test.txt", result);
I'm happy that you say it works for you, and here i add another solution, maybe in some cases you need to use this:
int removeAt = 7; //or any thing you want
int linesToRemove = 3; //or any thing you want
string s = System.IO.File.ReadAllText("Test.txt");
List<string> arr = s.Split(new char[] { '\n' }).ToList();
List<int> realBareRows = new List<int>();
for (int i = 0; i < arr.Count; i++)
{
if (string.IsNullOrEmpty(arr[i].Replace("\r", "")))
realBareRows.Add(i);
}
List<string> newArr = s.Split(System.Environment.NewLine.ToCharArray(), StringSplitOptions.RemoveEmptyEntries).ToList();
foreach (int j in realBareRows)
newArr.Insert(j, "\n");
for (int i = 0; i < linesToRemove; i++)
newArr.RemoveAt(removeAt);
string result = "";
foreach (string str in newArr)
{
result += str + System.Environment.NewLine;
}
System.IO.File.WriteAllText("Test.txt", result);