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Help with c# reflection?

I am trying to write a WPF custom control, and am trying to refactor it so that any List<T> can be converted into a List<CustomType>.

The CustomType has an Id property that I want to be assigned with the value of the Id property from an instance of the source T.

But my problem is how to map the name of the Id property on the source to the Id property on the CustomType.

A pseudocode method follows:

private void UsePropertiesOfInputCollectionInCollectionOfAnotherClass(IEnumerable<object> inputCollection , string nameOfTheMemberThatHoldsTheIdValueOfAnInputObject, Type typeOfTheObjectsInTheCollection)
        {
            foreach (var inputObject in inputCollection)
            {

                //cast the input object to the typeOfTheObjectsInTheCollection


                //interogate the member on the (cast)inputObject that is named: nameOfTheMemberThatHoldsTheIdValueOfAnInputObject


                //Create a new instance of the AnotherClass


                //assign the value of the interogated member to a property called AnotherClass.ClassID



            }
        }


Can you help?
0
quentinA
Asked:
quentinA
1 Solution
 
Craig WagnerSoftware ArchitectCommented:
You should make your method generic, it will save you time and trouble.

I threw this together in about two minutes. It doesn't do any error checking (e.g. what if the property doesn't exist on the input object, what if the datatypes are incompatible, etc), but it's enough to get you started.

private void UsePropertiesOfInputCollectionInCollectionOfAnotherClass<T>(
    IEnumerable<T> inputCollection, string nameOfIdProperty )
{
    foreach( var inputObject in inputCollection )
    {
        var propInfo = typeof( T ).GetProperty( nameOfIdProperty );

        var anotherClass = new AnotherClass();

        anotherClass.ClassId = (int)propInfo.GetValue( inputObject );
    }
}

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P.S. This type of question, when you even have comments of what needs to be done, often smells like a school assignment. I hope that isn't the case here.
0
 
quentinAAuthor Commented:
Thanks very much.
It isn't a school assignment (although I often feel as though I am at school, because i'm teaching myself).

I had done following (which works), I'll try yours too.
           var starterObjectType = starterCollection.First().GetType();

            foreach (var starterObject in starterCollection)
            {
                //cast the input object to the typeOfTheObjectsInTheCollection
                MethodInfo castMethod = this.GetType().GetMethod("Cast").MakeGenericMethod(starterObjectType);
                object castedObject = castMethod.Invoke(null, new object[] { starterObject });

                //interogate the member on the (cast)inputObject that is named: nameOfTheMemberThatHoldsTheIdValueOfAnInputObject
                var idResult = GetPropValue(castedObject, nameOfTheMemberThatHoldsTheIdValueOfAnInputObject).ToString();
                var iiid = Guid.Parse(idResult);

                //assign the value of the interogated member to a property called AnotherClass.ClassID
                RecordStarterProperties.Add(new StarterProperty(iiid, textOfTheMember, starterObject));
            }
0

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