SetValue of of a List<int16> property using reflection.

Question

I have a List<int16> property and I am trying to set the data in an index of the list using reflection.

The Property I am trying to change:

        public List<Int16> ListOfInts
        {
            get
            {
                return _ListOfInts;
            }
            set
            {
                _ListOfInts = value;
            }
        }

I have initialised _ListOfInts and added 2 ints e.g

_ListOfInts = new List<int16>();
_ListOfInts.add(0);
_ListOfInts.add(0);

 

My code:

PropertyInfo propertyToChange = comp.GetType().GetProperty("ListOfInts");
propertyToChange.SetValue(comp, data, new object[] { (int)0 });

I am trying to set the data in index 0 of the property ListOfInts to the value in data.

When I run the code I get the exception: Parameter Count Mismatch. I have checked that the list has been initialised and it contains 2 indexes.

 

I have run the similar code using a non list and it works, so its just the bit which sets the index that isn't working.

PropertyInfo propertyToChange = comp.GetType().GetProperty("ListOfInts");
propertyToChange.SetValue(comp, data, null);

All help appreciated! Thanks in advance!

Answer 1

That code works for an indexed property.

Get the property instance using the method  Type.GetProperty().GetValue(), than cast it to a List<short> and set the value normally.

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Matteo Migliore

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Answer 2

Hi,

Check this:

  Type tp = _ListOfInts .GetType();
            System.Reflection.PropertyInfo pInf = tp.GetProperty("Item");

int value = 3;
int index = 0;

            pInf.SetValue(intList, value, new object[] { index });

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Bilhan silva

Answer 3

Thanks for that!