searching in text files

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C#

C#4.0

With the help of console application in c sharp can we search our data in a text file.

plesse help !

Posted 23-Nov-11 17:12pm

Sarweshkr

Updated 23-Nov-11 18:17pm

koolprasad2003

v2

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Prerak Patel · Answer 1 · 2011-11-23T17:25:00

C#

string path = @"c:\somedir";
string searchtext = "something";
DirectoryInfo di = new DirectoryInfo(path);
FileInfo[] files = di.GetFiles("*.txt");
foreach (FileInfo file in files)
{
    using (StreamReader sr = new StreamReader(file.FullName))
    {
        string content = sr.ReadToEnd().ToLower();
        if(content.Contains(searchtext.ToLower()))
            Console.WriteLine("{0} contains \"{1}\"",file.Name,searchtext);
        else
            Console.WriteLine("{0} does not contain \"{1}\"", file.Name, searchtext);
    }
}

koolprasad2003 · Answer 2 · 2011-11-23T18:24:00

You can search in textfiles using RegularExpressions.Regex.IsMatch
First get the file in StreamReader and read it's content

C#

System.IO.StreamReader reader = new System.IO.StreamReader(file);
String text = reader.ReadToEnd();

use Regular expression to search the text

C#

if (System.Text.RegularExpressions.Regex.IsMatch(text, searchText))
{
    Console.WriteLine("word found");
}

searching in text files

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