如何使用Convert.ChangeType强制转换为特定类？

Question

Does anyone know how I can use Convert.ChangeType to cast from XML to a specific class?

For example:

My Property

public Point Loc
{
    get { return GetValue<Point2D>("Loc"); }
    set { SetValue<Point2D>("Loc", value); }
}

My XML:

<Loc>
 <X>1.0</X>
 <Y>1.0</Y>   
</Loc>

Call to convert:

prop.SetValue(targetObj, 
             Convert.ChangeType(xmlProperty.Value, prop.PropertyType));

I have looked at using IConvertible but none of the methods are being called.

All of the examples I could find are using simple types. None show casting to an instance of a class.

Thank you,

Rick

Answer 1

Why do you think you need Convert.ChangeType() ?

Surely you could just call SetValue() on the PropertyInfo object using the following overloaded SetValue method.:

prop.SetValue(targetObj,xmlProperty.Value,null);

However, you will first need to create an instance of the specific type, using something like Activator.CreateInstance() and set the individual properties for the Point. Subsequently, you then assign that point object/struct as input for the SetValue as you have it.