test how catch exception c#
[TestMethod]
[ExpectedException(typeof(ArgumentException),
"A userId of null was inappropriately allowed.")]
public void NullUserIdInConstructor()
{
LogonInfo logonInfo = new LogonInfo(null, "P@ss0word");
}test how catch exception c#
[TestMethod]
[ExpectedException(typeof(ArgumentException),
"A userId of null was inappropriately allowed.")]
public void NullUserIdInConstructor()
{
LogonInfo logonInfo = new LogonInfo(null, "P@ss0word");
}c# try and catch
try
{
ProcessString(s);
}
catch (Exception e)
{
Console.WriteLine("{0} Exception caught.", e);
}
}
}
/*
Output:
System.ArgumentNullException: Value cannot be null.
at TryFinallyTest.Main() Exception caught.
* */c# try
// ------------ How to use Try, Catch and Finally? --------------- //
// This is often used whenever you want to prevent your program from
// crashing due to an incorrect input given by the user
// ---> TRY
// Where you put the part of your code that can cause problems
// ---> CATCH
// The parameter of this will indicate which "exception" was the
// root of the problem. If you don't know the cause, then you can
// make this general, with just: catch (Exception).
// ---> FINALLY
// This block of code will always run, regardless of whether
// "try" or "catch" were trigger or not
using System;
namespace teste2
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Enter a Number:");
string input = Console.ReadLine();
try
{
int inputNumber = int.Parse(input); // if there is an error during the conversion, then we jump to a "catch"
Console.WriteLine("The power of value {0} is {1}", inputNumber, inputNumber * inputNumber);
}
catch (FormatException)
{
Console.WriteLine("Format Exception detected: The input needs to be a number");
}
catch (OverflowException)
{
Console.WriteLine("Overflow Exception detected: The input can't be that long");
}
catch (ArgumentNullException)
{
Console.WriteLine("Argument Null Exception detected: The input can't be null");
}
finally
{
Console.ReadKey();
}
}
}
}Copyright © 2021 Codeinu
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