In the application we are working on, when a violation of a business rule occurs, we raise a custom exception to handle the situation. A custom exception is an exception that is specifically created to address unique scenarios in our application. To create a custom exception, we derive a new class from either the ApplicationException or Exception class in C#. The ApplicationException class is included in the .NET Framework starting from version .NET v1.0 and is designed to serve as a base class for custom exception classes in C#.
Given below are the examples mentioned:
C# program to demonstrate the use of Custom Exception in a program.
Code:
using System; //a namespace called user defined is defined namespace UserDefined { //a class called test weather is defined class Testweather { //main method is called static void Main(string[] args) { //an instance of the class temperat is defined Temperat tem = new Temperat(); try { //the show method of temperat class is called using the instance of the temperat class tem.show(); } catch(WeatheriscoldException e) { Console.WriteLine("The weather is cold Exception: {0}", e.Message); } Console.ReadKey(); } } } //a custom exception class called Weather is cold Exception class is created which is thrown if the weather is cold public class WeatheriscoldException: Exception { public WeatheriscoldException(string message): base(message) { } } //a class called temperat is defined public class Temperat { //a variable called temp is defined and assigned to zero int temp = 0; //a method called show is defined public void show() { //the temperature is checked to determine the weather if(temp == 0) { throw (new WeatheriscoldException("The temperature is found to be zero and hence the weather is cold")); } else { Console.WriteLine("The Temperature is: {0}", temp); } } }
Output:
Explanation:
C# program to demonstrate the use of custom Exception in a program.
Code:
using System; //a namespace called exception handling is defined namespace ExceptionHandling { //The custom exception class called odd num exception class is created by inheriting the exception class public class OddNumException : Exception { //The property message is being overridden here public override string Message { get { return "There cannot be an odd divisor"; } } } //a class called check is defined class check { //main method is called static void Main(string[] args) { //three integer variables are defined int a, b, c; Console.WriteLine("Please enter two numbers and type of the numbers must be integer:"); a = int.Parse(Console.ReadLine()); b = int.Parse(Console.ReadLine()); try { //checking if the divisor is an odd number or an even number if (b % 2 > 0) { //exception is thrown if the divisor is an odd number throw new OddNumException(); } c = a / b; Console.WriteLine(c); } catch (OddNumException two) { Console.WriteLine(two.Message); } Console.WriteLine("The program ends here"); Console.ReadKey(); } } }
Output:
Explanation:
Given below are the advantages mentioned:
Das obige ist der detaillierte Inhalt vonBenutzerdefinierte Ausnahme in C#. Für weitere Informationen folgen Sie bitte anderen verwandten Artikeln auf der PHP chinesischen Website!