Question

Suppose I have a list of objects called TheListOfMyObjects. In that list, there’s an object with a property that matches a value: MyObject.TheProperty = SomeValue.

How can I get the previous 3 objects and the next 3 objects from within this list?

Note that if the object that matches SomeValue is in first position then I’d need the 3 objects in position 2-5 and the 3 objects in the last 3 positions for a total of 6 objects.

Thanks for your suggestions.

Answer 1

Try this:

var theObj = TheListOfMyObjects.First(x => x.TheProperty == someValue);
var index = TheListOfMyObjects.IndexOf(theObj);
//and from there it's obvious.

In case there’s a chance the list won’t contain such an element, use FirstOrDefault and check for null on theObj.