Object.CompareTo()

[rastam]

Hi

I have an object array:

object[] a = new object[100];

the array handles int, double, strings and other types which implements IComparable. And I allways check that the objects I put in the array are of the same type, so its either all ints or string etc..

Now, what I want to do is to compare the object using CompareTo, but the compiler complains..
this is the error I get:
'object' does not contain a definition for 'CompareTo'

Is there anyway to go around this problem without Implementing the IComparable myself? Cause I know that the object I want to compare is comparable..

Hope you understand my question. Thanks in advance

 

[chiph]

Yes, Object does not implement IComparable, and so it doesn't have a CompareTo method.

But what you can do, if you know the object type in the array, is to cast it to the proper type, and then compare it.

Widget w = a[42] as Widget;
if (w != null)
{
   w.CompareTo(someotherwidget);
}

Chip H.


____________________________________________________________________
Donate to Katrina relief:

http://s1.amazon.com/paypage/PELYGQVJ8Q7IB/103-6821258-5919825

If you want to get the best response to a question, please read FAQ222-2244 first

 

[NeilTrain]

Chip,
That looks like VB code, or is there another way to cast that I am unaware of, I thought it should be:

Widget w = (Widget)a[42];
if (w != null)
{
   w.CompareTo(someotherwidget);
}

 

[JurkMonkey]

VB Code indeed!

 

[chiph]

The as keyword is an important, yet under-appreciated part of the C# language. It allows you to check the type of a variable without exceptions being raised or other nasty side-effects.

Chip H.


____________________________________________________________________
Donate to Katrina relief:

http://s1.amazon.com/paypage/PELYGQVJ8Q7IB/103-6821258-5919825

If you want to get the best response to a question, please read FAQ222-2244 first

 

[rastam]

Thank you, it helped me alot!