CODEWITHSUNDEEP
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Feign
Feign

Reputation: 270

Equals vs. Is when dealing with GetType()

Here's the scenario,

I have a silverlight C1 Datacolumn, and I want to check its type.

I know of two ways to do so: 

 SilverLightColumn.DataType.Equals(GetType(Decimal))

And

 SilverLightColumn.DataType Is GetType(String)

The .DataType is a System.Type.

Is one way better than the other, or are they equivalent?

Or, am I totally wrong and there exists a better way to check for the type?

Upvotes: 0

Views: 95

Answers (2)

Scott Chamberlain
Scott Chamberlain

Reputation: 127603

They are not equivalent. If you had the following

Class Foo
   '...
End Class

Class Bar Inherits Foo
   '...
End Class

And the type of DataType is the type for Bar then 

SilverLightColumn.DataType Is GetType(Foo)

will return true, however

SilverLightColumn.DataType.Equals(GetType(Foo))

will return false. Is will return true for that type or any type that inherits from it, Equals must be the exact same type.

Upvotes: 2

Tushar Gupta
Tushar Gupta

Reputation: 15943

SilverLightColumn.DataType Is GetType(String)

Is will allow any type that inherits fronm it

SilverLightColumn.DataType = GetType(String)

= Allows only the exact match

You can also use the TypeOf operator instead of the GetType method

Upvotes: 0

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