Select a line from a text file in C# that has special contents.

Question

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Hello,

I have a text file and I just want to grab the lines of the file that ends with a certain character such as "<\a>" I am struggling with the syntax appreciate any help.

So if the there is a sentence in the file such as => " VALUE123 is good <\a>"
it will print that to console because it ends in <\a>

This is a sample text code.
In this file there are special lines to be extracted <\a>
Only special characters are to be extracted.
Select the lines of code please <\a>
This is a test <\a>

So the file would be read and then the following lines:

In this file there are special lines to be extracted <\a>
Select the lines of code please <\a>
This is a test <\a>

Would be written to console because the line ends in <\a>

Im thinking something like
string line = File.ReadAllText("Sample.txt");
if ( line.Contains(<\a>))
//code to write only selected information to console

Posted 24-Sep-15 10:15am

Member 12009796

Updated 24-Sep-15 13:32pm

v3

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Comments

PIEBALDconsult 24-Sep-15 16:20pm

I was going to say "RegularExpressions" until I saw that you are looking at HTML.
http://www.codinghorror.com/blog/2009/11/parsing-html-the-cthulhu-way.html

Member 12009796 24-Sep-15 16:26pm

Okay thanks I will have a look.

Zoltán Zörgő 24-Sep-15 16:25pm

It is not quite clear. Please add some sample to your post before you get some unusable answers.

Member 12009796 24-Sep-15 16:35pm

I have given an example if that makes things more clearer

Zoltán Zörgő 24-Sep-15 16:59pm

A more complex example please. Paste several lines from a real source and highlight (using formatting for example) what you want to extract.

Member 12009796 24-Sep-15 19:34pm

Please see updated info

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Matt T Heffron · Accepted Answer · 2015-09-24T15:21:00

C#

foreach (string line in File.ReadLines("Sample.txt"))
{
  if (line.EndsWith("<\a>"))
    Console.WriteLine(line);
}

or

C#

foreach (string line in File.ReadLines("Sample.txt").Where(line => line.EndsWith("<\a>")))
{
  Console.WriteLine(line);
}

or (a bit forced):

C#

File.ReadLines("Sample.txt").Where(line => line.EndsWith("<\a>")).All(l => { Console.WriteLine(l); return true; });

But the inclusion test could be more sophisticated depending on how in-exactly the <\a> must be matched.