Question

I have a class with some properties in it. Some specific properties are decorated with an attribute. For example:

public class CoreAddress
{
    private ContactStringProperty _LastName;

    [ChangeRequestField]
    public ContactStringProperty LastName
    {
        //ContactStringProperty has a method SameValueAs(ContactStringProperty other)
        get { return this._LastName; }
    }
    .....
}

I want to have a method in my class which walks through all my properties of this class, filters the one with this custom attribute and invokes a member of the found properties. This is what I have so far:

foreach (var p in this.GetType().GetProperties())
        {
            //checking if it's a change request field
            if (p.GetCustomAttributes(typeof(ChangeRequestFieldAttribute), false).Count() > 0)
            {

                MethodInfo method = p.PropertyType.GetMethod("SameValueAs");
                //problem here        
                var res = method.Invoke(null, new object[] { other.LastName }); 

            }

        }

If this method is an instance method of the property I have to provide a target (instead of null as in the code). How do I get the specific property of this class instance at runtime?

Answer 1

Since you already have the PropertyInfo, you can call the GetValue method. So…

MethodInfo method = p.PropertyType.GetMethod("SameValueAs");
//problem solved
var propValue = p.GetValue(this);

var res = method.Invoke(propValue, new object[] { other.LastName });