Difference between Convert.ToString() and .ToString() in C#
Well most of us might have seen Convert.TOString() and .ToString() in C# code. Baically both are used to convert a value to a String but there is a basic difference between them. When we have an NULL object, Convert.ToString(Object); handles the NULL value but where as Object.ToString(); does not handle the NULL value and it throws NULL Reference Exception. Lets go through an example:
1 2 3 4 5 6 7 8 9 10 11 | int age = 25; string s = age.ToString(); // age value will be converted to String string s = Convert.ToString(age); // age value will be converted to string // But when we have a null value for an object int age = 0; string s = age.ToString(); // age value will not be converted to String, //as .ToString(); will not handle the NULL values and it throws a NULL Reference Exception error. string s = Convert.ToString(age); // age value will be converted to string, //as Convert.ToString(); will handle the NULL values; |
So it is a Good Programming practise to use Covert.ToString() as it handles the NULL values which saves us from unnecessary debugging.
Filed Under: Language Basics
