Overriding explicit and implicit conversion in C# .NET

Custom implicit and explicit conversions for numeric types can be defined in C# quite easily. You need to be aware of the “implicit”, “explicit” and “operator” keywords.

Consider the following class:

public class Measurement
{
	public int Value { get; set; }
}

Say you want to be able to convert an integer to a Measurement object and vice versa. You can extend the Measurement class as follows:

public static implicit operator Measurement(int value)
{
	return new Measurement() { Value = value };
}

public static explicit operator int(Measurement m)
{
	return m.Value;
}

This is how you can convert an integer to a Measurement object:

int value = 30;
Measurement measurement = value;

That’s right, you can simply assign the integer to a measurement object, its Value property will be 30.

Here’s how you can convert a Measurement object to an integer:

Measurement m = new Measurement() { Value = 15 };
int val = (int)m;

“val” will be 15 as expected.

View all various C# language feature related posts here.

Advertisements

About Andras Nemes
I'm a .NET/Java developer living and working in Stockholm, Sweden.

3 Responses to Overriding explicit and implicit conversion in C# .NET

  1. Wow! I did not know that this is possible! Cool!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

ultimatemindsettoday

A great WordPress.com site

iReadable { }

.NET Tips & Tricks

Robin Sedlaczek's Blog

Developer on Microsoft Technologies

HarsH ReaLiTy

A Good Blog is Hard to Find

Ricos Blog zu Softwaredesign- und architektur

Ideen und Gedanken rund um Softwaredesign und -architektur, Domain-Driven Design, C# und Windows Azure

the software architecture

thoughts, ideas, diagrams,enterprise code, design pattern , solution designs

Technology Talks

on Microsoft technologies, Web, Android and others

Software Engineering

Web development

Disparate Opinions

Various tidbits

chsakell's Blog

Anything around ASP.NET MVC,WEB API, WCF, Entity Framework & AngularJS

Cyber Matters

Bite-size insight on Cyber Security for the not too technical.

Guru N Guns's

OneSolution To dOTnET.

Johnny Zraiby

Measuring programming progress by lines of code is like measuring aircraft building progress by weight.

%d bloggers like this: