Question

How to use the Try/Catch block to catch exceptions in C#

Answer 1

using System;
using System.IO;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                StreamReader sr = File.OpenText("c:\\data.txt");
                Console.WriteLine("The first text: {0}", sr.ReadLine());
                sr.Close();
            }
            catch (Exception e)
            {
                Console.WriteLine("{0} - {1}", e.GetType(), e.Message);
            }
        }
    }
}


/*
run:
 
System.IO.FileNotFoundException - Could not find file 'c:\data.txt'.
 
*/

 

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Answer 2

using System;
using System.IO;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                StreamReader sr = File.OpenText("c:\\data.txt");
                Console.WriteLine("The first text:  {0}", sr.ReadLine());
                sr.Close();
            }
            catch (Exception e)
            {
                Console.WriteLine(e);
            }
        }
    }
}


/*
run:
 
System.IO.FileNotFoundException: Could not find file 'c:\data.txt'.
File name: 'c:\data.txt'
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, I
nt32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions o
ptions, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolea
n useLongPath, Boolean checkHost)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access,
FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean
bFromProxy, Boolean useLongPath, Boolean checkHost)
   at System.IO.StreamReader..ctor(String path, Encoding encoding, Boolean detec
tEncodingFromByteOrderMarks, Int32 bufferSize, Boolean checkHost)
   at System.IO.StreamReader..ctor(String path)
   at System.IO.File.OpenText(String path)
   at ConsoleApplication_C_Sharp.Program.Main(String[] args) in D:\directx\Conso
leApplication_C_Sharp\ConsoleApplication_C_Sharp\Program.cs:line 12
 
*/

 

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