static void Main(string[] args)
{
//try
//{
// using (var streamReader = new StreamReader(@"c:\file.zip"))
// {
// var content = streamReader.ReadToEnd();
// }
//}
//catch (Exception e)
//{
// Console.WriteLine("Unexpected error occurred");
//}
//finally
//{
// ////IDisposable
// //if(streamReader != null)
// // streamReader.Dispose();
//}
try
{
var api = new YouTubeApi();
var videos = api.GetVideos("Zane");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
static void Main(string[] args)
{
#region StreamReader Example
// StreamReader streamReader = null;
try
{
// using statement here allows us to not need to dispose, and thus not need the finally block
using (var streamReader = new StreamReader(@"C:\Personal Projects\Udemy\C-Sharp-Intermediate-Skills\log.txt"))
{
var content = streamReader.ReadToEnd();
Console.WriteLine(content);
}
}
catch (Exception ex)
{
Console.WriteLine($"Sorry, an unexpected error ocurred: {ex.Message}");
}
//finally // Finally blocks are always excuted, regardless of whether or not an exception is thrown.
//{
// if (streamReader != null)
// streamReader.Dispose(); // prevents us from accidentally leaving a file open on the disk, leaving network or db connections open, and overloading resources
//}
#endregion
#region YouTubeApi Example
try
{
var api = new YouTubeApi();
var videos = api.GetVideos("ransford");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message + " Inner Execption: " + ex.InnerException.Message);
}
#endregion
#region Caclulator
try
{
var calc = new Calculator();
var result = calc.Divide(5, 0);
}
catch (DivideByZeroException ex) { Console.WriteLine("You cannont divide by zero."); }
catch (ArithmeticException ex) { Console.WriteLine("Your Maths were bad."); }
catch (Exception ex) // 'Exception' is the parent of all exceptions in C#
{
Console.WriteLine($"Sorry, an unexpected error occured: {ex.Message}");
}
finally
{
}
#endregion
}
static void Main(string[] args)
{
try
{
var api = new YouTubeApi();
var videos = api.GetVideos("mosh");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
private static void GetVideos()
{
try
{
var api = new YouTubeApi();
api.GetVideos("Michiel");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
static void Main(string[] args)
{
try
{
Console.WriteLine("This is a test branch version.");
var youTubeApi = new YouTubeApi();
youTubeApi.GetVideos("Peti");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
public static void Main(string[] args)
{
// Below is the simple calculator example
//try
//{
// var calculator = new Calculator();
// var result = calculator.Divide(5, 0);
// Console.WriteLine($"The result: {result}");
//}
//catch (DivideByZeroException ex)
//{
// Console.WriteLine("You cannot divide by zero.");
//}
//catch (Exception ex)
//{
// Console.WriteLine("Sorry an unexspected exception occurred.");
//}
//Below is the StreamReader exception example
//StreamReader reader = null;
//try
//{
// reader = new StreamReader(@"C:\Documents\sampletext.txt");
// var text = reader.ReadToEnd();
// throw new Exception("An exception has occured!");
//}
//catch(Exception ex)
//{
// Console.WriteLine($"A problem has occured : {ex.Message}.");
//}
//finally
//{
// if (reader != null)
// reader.Dispose();
//}
// Creating a YouTube exception
try
{
var youTubeApi = new YouTubeApi();
youTubeApi.GetUserVideos();
}
catch (Exception ex)
{
Console.WriteLine($"{ex.Message} - {ex.InnerException.Message}");
}
}
static void Main(string[] args)
{
try
{
var video = new YouTubeApi().GetVideos("Shefali");
//using (StreamReader streamReader = new StreamReader(""))
//{
// var video =
//}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
Console.ReadLine();
}
static void Main(string[] args)
{
//try
//{
// var calculator = new Calculator();
// var result = calculator.Divide(5, 0);
//}
//catch (DivideByZeroException ex)
//{
// Console.WriteLine("You cannot divide by zero.");
//}
//catch (ArithmeticException ex)
//{
//}
//catch (Exception ex)
//{
// Console.WriteLine("Sorry, an unexpected error occured.");
//}
//finally
//{
// //Dispose için kullan
//}
//Bu şekilde dışarıda değişkeni tanımlayıp finally ile yakalamak yerine using kullanabiliriz.
//StreamReader streamReader = null;
//try
//{
// streamReader = new StreamReader(@"C:\file.zip");
// streamReader.ReadToEnd();
// throw new Exception("Oops");
//}
//catch (Exception ex)
//{
// Console.WriteLine("Sorry, an unexpected error occured.");
//}
//finally
//{
// if (streamReader != null)
// streamReader.Dispose();
//}
//using ile kullanımı
//try
//{
// using (var streamReader = new StreamReader(@"C:\file.zip"))
// {
// var content = streamReader.ReadToEnd();
// }
//}
//catch (Exception ex)//Global excepttion handler
//{
// Console.WriteLine("Sorry, an unexpected error occured.");
//}
try
{
var api = new YouTubeApi();
var videos = api.GetVideos("mosh");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.ReadLine();
}
static void Main(string[] args)
{
// try
// {
// var calculator = new Calculator();
// var result = calculator.Divide(5, 0);
// }
//
// catch (DivideByZeroException ex)
// {
//
// }
//
// catch (ArithmeticException ex)
// {
//
// }
// catch (Exception ex)
// {
// Console.WriteLine("Sorry, an unexpected error occurred.");
// }
// finally
// {
// IDisposable
// }
// StreamReader streamReader = null;
//
// try
// {
// streamReader = new StreamReader(@"C:\file.zip");
// var content = streamReader.ReadToEnd();
// }
// catch (Exception ex)
// {
// Console.WriteLine("Sorry, an unexpected error occurred.");
// }
// finally
// {
// if (streamReader != null)
// {
// streamReader.Dispose();
//
// }
// }
// try
// {
// using (var streamReader = new StreamReader(@"C:\file.zip"))
// {
// var content = streamReader.ReadToEnd();
// }
// }
// catch (Exception ex)
// {
// Console.WriteLine("Sorry, an unexpected error occurred.");
// }
try
{
var api = new YouTubeApi();
var videos = api.GetVideos("user");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
static void Main(string[] args)
{
//try
//{
// var calculator = new Calculator();
// var result = calculator.Divide(5, 0);
//}
//// adding the variable ex gives access to the information one gets by hovering over ex in VS
//catch (DivideByZeroException ex) // multiple catch block must be in specific to generic order
//{
// Console.WriteLine("You cannot divide by 0.");
//}
//catch (ArithmeticException ex) // otherwise the generic will fire, and we won't see the specific one
//{
//}
//catch (Exception ex) // It's good to have an argument here to access actual exception
//{
// Console.WriteLine("Sorry, an unexpected error occurred.");
//}
//finally
//{
//}
//StreamReader streamReader = null;
//try
//{
// streamReader = new StreamReader(@"c:\file.zip");
// var content = streamReader.ReadToEnd();
// throw new Exception("Oops"); // one can just manually throw an exception
//}
//catch (Exception) // Only executed if there is a problem in the try block
//{
// Console.WriteLine("Sorry, an unexpected error occurred.");
//}
//finally
//{
// if (streamReader != null)
// streamReader.Dispose(); // executed no matter what calls dispose on streamReader to close file handle
//}
// A better way of doing the above is this (cleaner)
//try
//{
// using (var streamReader = new StreamReader(@"c:\file.zip")) // using will automatically call dispose at the end
// {
// var content = streamReader.ReadToEnd();
// }
//}
//catch (Exception ex)
//{
// Console.WriteLine("Sorry, an unexpected error occurred.");
//}
try
{
var api = new YouTubeApi();
var videos = api.GetVideos("mosh");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message); // The message created in the other methods gets passed here
} // This is the only cw
}
public static void Main(string[] args)
{
// Example showing multiple catch blocks with decreasingly specific Exceptions
try
{
var calculator = new Calculator();
var result = calculator.Divide(5, 0);
}
catch (DivideByZeroException ex)
{
Console.WriteLine("Divide by Zero");
}
catch (ArithmeticException ex)
{
Console.WriteLine("Arith exception");
}
catch (Exception ex)
{
Console.WriteLine("An unexpected error occurred");
}
finally
{
}
// Another example showing the finally block being used
StreamReader streamReader = null;
try
{
streamReader = new StreamReader(@"C:\file.zip");
var content = streamReader.ReadToEnd();
}
catch (Exception ex)
{
Console.WriteLine("An unexpected error occurred");
}
finally
{
if (streamReader != null)
{
streamReader.Dispose();
}
}
// This can be cleaned up with the "using" statement, which creates a "finally" block under the hood:
try
{
using (var streamReaderClean = new StreamReader(@"c:\file.zip"))
{
var content = streamReaderClean.ReadToEnd();
}
}
catch (Exception ex)
{
Console.WriteLine("An unexpected error occurred");
}
// Custom exceptions
try
{
var api = new YouTubeApi();
var videos = api.GetVideos("mark");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
static void Main(string[] args)
{
try
{
var calculator = new Calculator();
var result = calculator.Divide(5, 0);
}
catch (DivideByZeroException ex)
{
Console.WriteLine("Sorry, an unexpected divide by zero error occurred.");
}
catch (ArithmeticException ex)
{
Console.WriteLine("Sorry, an unexpected arithmetic error occurred.");
}
catch (SystemException ex)
{
Console.WriteLine("Sorry, an unexpected system error occurred.");
}
catch (Exception ex) //variable for exception not required just the Exception class but by having the variable you can call it later
{
Console.WriteLine("Sorry, an unexpected error occurred.");
}
finally //great for cleaning up unmanaged resources
{
Console.WriteLine("Finally.");
}
//dynamic streamReader = 0;
StreamReader streamReader = null;
Console.WriteLine("Test");
try
{
streamReader = new StreamReader(@"c:\file.zip");
var content = streamReader.ReadToEnd();
}
catch (Exception ex)
{
Console.WriteLine("Sorry, an unexpected error occurred.");
}
finally //great for cleaning up unmanaged resources
{
if (streamReader != null)
{
streamReader.Dispose();
Console.WriteLine("Successfully Disposed!");
}
}
try
{
using (var streamReader1 = new StreamReader(@"c:\file.zip")) //automatically sets up hidden finally and dispose this is the prefferable method
{
var content = streamReader.ReadToEnd();
}
}
catch (Exception ex)
{
Console.WriteLine("Sorry, an unexpected error occurred.");
}
try
{
var api = new YouTubeApi();
var videos = api.GetVideos("mosh");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
static void Main(string[] args)
{
//var filePath =
// @"C:\Users\Nilton\Documents\GitHub\udemy-c-sharp-advanced-topics\section02\ExceptionHandling\file.txt";
//var streamReader = new StreamReader(filePath);
//try
//{
// var calculator = new Calculator();
// var result = calculator.Divide(5, 0);
//}
//catch (DivideByZeroException ex)
//{
// Console.WriteLine("You cannot divide by 0.");
//}
//catch (ArithmeticException ex)
//{
//}
//catch (Exception ex)
//{
// Console.WriteLine("Sorry, an unexpected error occured.");
//}
//finally
//{
// streamReader.Dispose();
//}
//StreamReader streamReader = null;
//var filePath =
// @"C:\Users\Nilton\Documents\GitHub\udemy-c-sharp-advanced-topics\section02\ExceptionHandling\file.txt";
//try
//{
// streamReader = new StreamReader(filePath);
// var content = streamReader.ReadToEnd();
// throw new Exception("Oops");
//}
//catch (Exception ex)
//{
// Console.WriteLine("Sorry, an unexpected error occured.");
//}
//finally
//{
// if (streamReader != null)
// streamReader.Dispose();
//}
//var filePath =
// @"C:\Users\Nilton\Documents\GitHub\udemy-c-sharp-advanced-topics\section02\ExceptionHandling\file.txt";
//try
//{
// using (var streamReader = new StreamReader(filePath))
// {
// var content = streamReader.ReadToEnd();
// }
//}
//catch (Exception ex)
//{
// Console.WriteLine("Sorry, an unexpected error occured.");
//}
try
{
var api = new YouTubeApi();
var videos = api.GetVideos("mosh");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
static void Main(string[] args)
{
StreamReader streamReader = null;
// below is global exception error handling block: the exceptions are from the most specific one to the most generic exception
// defined a stream reader, stream reader is a class for reading any streams of data(files, network, etc)
try
{
// option 2: use using method: using method will create the finally block under the hook
// so you do not have to create finally block for using() method
using (var streamReader0 = new StreamReader(@"c:\file.zip"))
{
var content0 = streamReader0.ReadToEnd();
}
// option 1: {
streamReader = new StreamReader(@"c:\file.zip");
// in try block, we can read the content of the this file
var content = streamReader.ReadToEnd();
throw new Exception("opps");
// } option 1
// option calculator {
Calculator calculator = new Calculator();
calculator.Divide(5, 0);
// } option calculator
}
// catch the errors from the most specific to the most generic
catch (DivideByZeroException ex) // DivideByZeroException class
// if you are using Exception class, it is a parent of all of Excepts
{
Console.WriteLine("You can not divide by 0.");
}
catch (ArithmeticException ex) // ex is an argument
{
Console.WriteLine("second level exception error.");
}
catch (Exception ex)
{
// 1. recover from the error
Console.WriteLine("An unexpected error occurred.");
// 2. re-throw the error
}
finally // finally block is not applied to using method in try block
// finally block, in .Net there are some classes are access unmanaged resources,
//which these resources are not managed by CLR, it means there is no garbage collection to apply to them.
//it means we need to manually clean out, by using IDisposable interface, and a method call Dispose()
// we use finally to call IDisposable method for clean out unmanaged resources
{
if (streamReader != null)
{
streamReader.Dispose();
// if anything goes wrong inside the try block during reading the file, we want to make sure streamReader is closed
// if we do not Dispose streamReader, it will keep the file opened on the disk, keep database opens, or keep network opens
// so whenever using unmanaged resource, make sure to dispose in the finally block
}
// Console.WriteLine("Finally block is to call the <dispose method> of the class that is using the manage resources");
}
// For YouTubeAPI class
try
{
var api = new YouTubeApi();
var videos = api.GetVideos("mosh");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
throw;
}
}
static void Main(string[] args)
{
//try
//{
// var calculator = new Calculator();
// var result = calculator.Divide(5, 0);
//}
//catch (DivideByZeroException ex)
//{
// Console.WriteLine("You cannot divide by zero.");
//}
//catch (ArithmeticException ex)
//{
//}
//catch (Exception ex)
//{
// Console.WriteLine("Sorry, an unexpected error occured.");
//}
//finally
//{
// //Dispose için kullan
//}
//Bu şekilde dışarıda değişkeni tanımlayıp finally ile yakalamak yerine using kullanabiliriz.
//StreamReader streamReader = null;
//try
//{
// streamReader = new StreamReader(@"C:\file.zip");
// streamReader.ReadToEnd();
// throw new Exception("Oops");
//}
//catch (Exception ex)
//{
// Console.WriteLine("Sorry, an unexpected error occured.");
//}
//finally
//{
// if (streamReader != null)
// streamReader.Dispose();
//}
//using ile kullanımı
//try
//{
// using (var streamReader = new StreamReader(@"C:\file.zip"))
// {
// var content = streamReader.ReadToEnd();
// }
//}
//catch (Exception ex)//Global excepttion handler
//{
// Console.WriteLine("Sorry, an unexpected error occured.");
//}
try
{
var api = new YouTubeApi();
var videos = api.GetVideos("mosh");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.ReadLine();
}