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The following code snippet described the whole solution by-itself:
1. Make an object of StreamReader
2. Get read file line by line
3. Create cases as many as you require
4. I used following text file for demostration purpose:
File Name : myComments.txt
//How to read comments from a text file
/*This example shows how to read
comments from a text file*/
//Again Single Line comment
#region Author initials
/* How to get comments from
* a text file
* Author : Gaurav Arora
* Date : July 12, 2009
* Series: A Step Ahead Series*/
#endregion
#region Namespaces Used
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
#endregion
namespace ReadingCommetFile.AstepAheadSeries
{
#region Class displaying Comments
class Program
{
static void Main(string[] args)
{
//Set the actual path from your system
const string strFilePath = @"E:\Drive-F\My Articles\ReadingCommetFile\ReadingCommetFile\myComments.txt";
ReturnComments objReturnComemnts = new ReturnComments();
Console.WriteLine("Single Line Comments : ");
String strSingleLine = objReturnComemnts.GetCommentsinUpperCase(strFilePath, "SingleLine");
Console.WriteLine(strSingleLine);
Console.WriteLine("MultiLine Comments : ");
String strMultileLine = objReturnComemnts.GetCommentsinUpperCase(strFilePath, "MultiLine");
Console.WriteLine(strMultileLine);
Console.Read();
// Suspend the screen.
Console.ReadLine();
}
}
#endregion
#region Class containing methods to read comments
class ReturnComments
{
public String GetCommentsinUpperCase(String strFilePath, String strCase)
{
int counter = 0;
string line;
string strRetunComments = String.Empty;
StringBuilder sbSingleLine = new StringBuilder();
StringBuilder sbMultiLine = new StringBuilder();
//Create streamReader object
StreamReader file = new StreamReader(strFilePath);
//Read line by line
while ((line = file.ReadLine()) != null)
{
switch (strCase)
{
case "SingleLine":
if (line.Contains("//")) //for singleline comment
{
//Get rest part of line in uppercase and move the counter to next line
String strLine = line.Replace("//", "");
strLine.ToUpper();
sbSingleLine.AppendLine(strLine);
counter++;
}
strRetunComments = sbSingleLine.ToString();
break;
case "MultiLine":
if (line.Contains("/*")) //for multiple line comments
{
String strLine = line.Replace("/*", "");
strLine.ToUpper();
sbMultiLine.AppendLine(strLine);
counter++;
}
if (line.Contains("*/")) //Termination of multiple line comments
{
String strLine = line.Replace("*/", "");
strLine.ToUpper();
sbMultiLine.AppendLine(strLine);
counter++;
}
strRetunComments = sbMultiLine.ToString();
break;
default:
//by default line which does not fall in above cases may be treated as a part of multiple comment
//in this case I supposed that this is a part of multiline comment
line.ToUpper();
sbMultiLine.AppendLine(line);
counter++;
break;
}
}
sbSingleLine = null;
sbMultiLine = null;
file.Close();
return strRetunComments;
}
}
#endregion
/* Note : From the help of above you can also get the other details like Author Name, Description etc.
* by Checking cases. */
}
Following is the final output:
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