remove object from the list if certain statement is true [duplicate]

Question

using linq I want to check certain condition, if that condition is met I want to remove that object from the list

pseudo code

if any object inside cars list has Manufacturer.CarFormat != null
delete that object

if (muObj.Cars.Any(x => x.Manufacturer.CarFormat != null))
{
    ?
}

Slepz · Accepted Answer · 2015-12-17 20:55:44Z

4

using the List function RemoveAll, you can

muObj.Cars.RemoveAll(x => x.Manufacturer.CarFormat != null);

edited Dec 17, 2015 at 20:55

answered Dec 17, 2015 at 20:48

Slepz

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2 Comments

D Stanley Over a year ago

Technically that's not Linq - just a normal method on List.

Slepz Over a year ago

yep you're right. edited.

D Stanley · Accepted Answer · 2015-12-17 21:07:03Z

1

I don't have this RemoveAll method on IList

That's because RemoveAll is a method on List<T>, not IList<T>. If you don't want to try casting to List<T> (what if it fails?) then one option is loop through by index (in reverse order so as to not mess up the index counting:

for (int i = muObj.Cars.Count - 1; i >= 0; i--)
{
    if(muObj.Cars[i].Manufacturer.CarFormat != null)
        muObj.Cars.RemoveAt(i);
}

edited Dec 17, 2015 at 21:07

answered Dec 17, 2015 at 20:56

D Stanley

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