Problem with ArrayList storing objects of different class type in c#

Giftsana

I have an ArrayList that has objects of different class types stored in it. Basically each of thess class represent a different Questionnaire class.

I retrieve each of these Questionnaire class with it's specific info like 'Question ID', 'Question text', 'Number of Choices' etc. and store it in an ArrayList say arrQDetails.

Now i want to iterate through each of the question objects in the ArrayList and perform respective implementations in each object i.e dynamically generating checkboxes based on 'Number of Choice'.

i am using foreach(Object o in objQuestionnaire.arrQDetails) . but it doesnt seem to work?if there are 2 objects(each have different details) of the same class type, i am able to dynamically generate controls only for one object type not the second object?

The arraylist may also have more than 1 object of the same type type but each with different info. there are 4 different class type of objects that am storing.

How do i solve this?

Awaiting a response soon. Thanks in advance.

2 Replies

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Giftsana20y ago
Thanks a lot for the reply. I got a solution to it.

Thanks
Giftsana
mcbanex20y ago
You probably want to use your own base class for the questions instead of using object as the base class.

Do something along the lines of:
class QuestionType
{
// methods that are generic to all your classes
public void doSomething() { }
}

then another class
class SpecificQuestionType : QuestionType
{
// override your generic method
override public void doSomething() { // more specific stuff }
}

Then your foreach loop would be more like:
foreach(QuestionType qt in QuestionList)
qt.doSomething();

Hope this helps...