B
Bill Uliv
Guest
I copied line for line out of the C# For Dummies Book. ( pages 450-451)
The end game, is to open a comma delimited file, but I am trying to learn C#. The code I have below is what I entered, but I can not figure out whats wrong with it. I dont even understand the error messages. I got it down from 16 errors to 2, so any help would be appreciated.
using System;
using System.IO;
using System.IO.StreamReader;
namespace FileRead
{
public class Program
{
public static void Main(string[] args)
{
// You need a file reader object
StreamReader sr = null;
string fileName = " ";
try
{
// Get a fileName from the user
sr = GetReaderForFile (fileName);
// Read the contents of the file.
ReadFileToConsole (sr);
}
catch (IOException ioErr)
{
Console.WriteLine(" {0} \n\n", ioErr.Message);
}
finally // Clean up
{
if (sr != null) // Guard against trying to close () a null object
{
sr.Close(); //Take care of flush as well
sr=null;
}
}
Console.WriteLine (" Press Enter to Termintae... " );
Console.Read();
}
public void GetReaderForFile (string fileName)
{
StreamReader sr;
Console.Write ("Enter the name of the file to read ");
fileName=Console.ReadLine();
// User didnt enter anything; throw an exception
// to indicate that this is not acceptable
if (fileName.Length==0)
{
throw new IOException (" You need to enter a filename. ");
}
FileStream fs= File.Open (fileName, FileMode.Open, FileAccess.Read);
sr=new StreamReader (fs,true);
return sr;}
// ReadFileTo COnsole by sr and write them out to console
private static void ReadFileToConsole(StreamReader sr)
{
Console.WriteLine( " \nContents of file");
//Read one libe at a time
while (true)
{
//Read Line
string input = sr.ReadLine ();
// Quit when you dont get anything back
if (input==null)
{
break;
}
// Write whatever you read to the console
Console.WriteLine (input);
}
}
}
}
Continue reading...
The end game, is to open a comma delimited file, but I am trying to learn C#. The code I have below is what I entered, but I can not figure out whats wrong with it. I dont even understand the error messages. I got it down from 16 errors to 2, so any help would be appreciated.
using System;
using System.IO;
using System.IO.StreamReader;
namespace FileRead
{
public class Program
{
public static void Main(string[] args)
{
// You need a file reader object
StreamReader sr = null;
string fileName = " ";
try
{
// Get a fileName from the user
sr = GetReaderForFile (fileName);
// Read the contents of the file.
ReadFileToConsole (sr);
}
catch (IOException ioErr)
{
Console.WriteLine(" {0} \n\n", ioErr.Message);
}
finally // Clean up
{
if (sr != null) // Guard against trying to close () a null object
{
sr.Close(); //Take care of flush as well
sr=null;
}
}
Console.WriteLine (" Press Enter to Termintae... " );
Console.Read();
}
public void GetReaderForFile (string fileName)
{
StreamReader sr;
Console.Write ("Enter the name of the file to read ");
fileName=Console.ReadLine();
// User didnt enter anything; throw an exception
// to indicate that this is not acceptable
if (fileName.Length==0)
{
throw new IOException (" You need to enter a filename. ");
}
FileStream fs= File.Open (fileName, FileMode.Open, FileAccess.Read);
sr=new StreamReader (fs,true);
return sr;}
// ReadFileTo COnsole by sr and write them out to console
private static void ReadFileToConsole(StreamReader sr)
{
Console.WriteLine( " \nContents of file");
//Read one libe at a time
while (true)
{
//Read Line
string input = sr.ReadLine ();
// Quit when you dont get anything back
if (input==null)
{
break;
}
// Write whatever you read to the console
Console.WriteLine (input);
}
}
}
}
Continue reading...