Find Text in Files and retrieve the line number

Question

I am trying to (programatically) find references to a specific string i.e. \'LOCK_ID\' within a large number of VB6 files. To help people navigate directly to the reference

Answer 1

Here are the functions I used to achieve the desired functionality:

private void FindReferences( List output, string searchPath, string searchString )
{
    if ( Directory.Exists( searchPath ) )
    {                                                                
        string[] files = Directory.GetFiles( searchPath, "*.*", SearchOption.AllDirectories );
        string line;

        // Loop through all the files in the specified directory & in all sub-directories
        foreach ( string file in files )
        {
            using ( StreamReader reader = new StreamReader( file ) )
            {
                int lineNumber = 1;
                while ( ( line = reader.ReadLine() ) != null )
                {
                    if ( line.Contains( searchString, StringComparison.OrdinalIgnoreCase ) )
                    {
                        output.Add( string.Format( "{0}:{1}", file, lineNumber ) );
                    }

                    lineNumber++;
                }
            }                   
        }
    }
}

Helper class:

/// 

/// Determines whether the source string contains the specified value.
/// 
/// The String to search.
/// The search criteria.
/// The string comparison options to use.
/// 
///   true if the source contains the specified value; otherwise, false.
/// 
public static bool Contains( this string source, string value, StringComparison comparisonOptions )
{
    return source.IndexOf( value, comparisonOptions ) >= 0;
}