Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
What is the main difference between int.Parse() and Convert.ToInt32 in C#?
Convert a string representation of number to an integer, using the int.Parse or Convert.ToInt32 method in C#. If the string cannot be converted, then the int.Parse or Convert.ToInt32 method returns an exception
Convert.ToInt32 allows null value, it doesn't throw any errors Int.parse does not allow null value, and it throws an ArgumentNullException error.
Example
class Program {
static void Main() {
int res;
string myStr = "5000";
res = int.Parse(myStr);
Console.WriteLine("Converting String is a numeric representation: " + res);
Console.ReadLine();
}
}Output
Converting String is a numeric representation: 5000
Example
class Program {
static void Main() {
int res;
string myStr = null;
res = Convert.ToInt32(myStr);
Console.WriteLine("Converting String is a numeric representation: " + res);
Console.ReadLine();
}
}Output
Converting String is a numeric representation: 0
Example
class Program {
static void Main() {
int res;
string myStr = null;
res = int.Parse(myStr);
Console.WriteLine("Converting String is a numeric representation: " + res);
Console.ReadLine();
}
}Output
Unhandled exception. System.ArgumentNullException: Value cannot be null.
Updated on: 08-Aug-2020
4K+ Views
Advertisements