How to compare types

c# .net
Archedius picture Archedius · Mar 30, 2011 · Viewed 158k times · Source

Quick question: how to compare a Type type (pun not intended) with another type in C#? I mean, I've a Type typeField and I want to know if it is System.String, System.DateTime, etc., but typeField.Equals(System.String) doesn't work.

Any clue?

Answer

JaredPar picture JaredPar · Mar 30, 2011

Try the following

typeField == typeof(string)
typeField == typeof(DateTime)

The typeof operator in C# will give you a Type object for the named type. Type instances are comparable with the == operator so this is a good method for comparing them.

Note: If I remember correctly, there are some cases where this breaks down when the types involved are COM interfaces which are embedded into assemblies (via NoPIA). Doesn't sound like this is the case here.

Related questions

How to make an HTTP POST web request

Canonical How can I make an HTTP request and send some data using the POST method? I can do a GET request, but I have no idea of how to make a POST request.

Read More
How can I convert String to Int?

I have a TextBoxD1.Text and I want to convert it to an int to store it in a database. How can I do this?

Read More
What is a NullReferenceException, and how do I fix it?

I have some code and when it executes, it throws a NullReferenceException, saying: Object reference not set to an instance of an object. What does this mean, and what can I do to fix this error?

Read More