CODEWITHSUNDEEP
c#.netvb.netreflection
Rabskatran
Rabskatran

Reputation: 2309

How do I invoke a method on a class using attributes?

I want to invoke a method on a class that i have a reference to. The method that I want to call has a custom attributes. Currently I can find this attributes and call the property of my class Attribute.

is there a way to invoke that method ?

PS/ The project is written in vbnet, but I think the solution is the same in c#.

Upvotes: 2

Views: 2155

Answers (1)

Adriano Repetti
Adriano Repetti

Reputation: 67148

If you can find the attributes I guess you have the MethodInfo of that method(s). Simply call the MethodInfo.Invoke method, you have to specify the instance of the object you want to use (or null if it's a static method) and all the parameters to pass to the method (in the same order of the prototype).

For example if you have to invoke a method with this prototype:

void Foo(string name, int value);

And you have a function to find that method (making a search for a given attribute):

MethodInfo FindMethodWithAttribute(Type attributeType, Type objectType);

You can find and invoke that method (of a hypothetical object anObject) with this code:

MethodInfo method = FindMethodWithAttribute(
    typeof(MyAttribute), // Type of the "marker" attribute
    anObject.GetType()); // Type of the object may contain the method

method.Invoke(anObject, new object[] { "someText", 2 });

Upvotes: 2

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