Question

Suppose i have the following class in C#:

public class B : A
{
    public Int32 B_ID;
    public String B_Value;

    public Int32 getID()
    {
        return B_ID;
    }

    public void setID(Int32 value)
    {
        B_ID = value;
    }
}

Based on Reflection, can I get the name of the field used by getID() (and/or) setID() method? (in case, [B_ID])
I’m coding a persistence framework and it would be useful to identify the key name of a table, which is enclosed by both methods above.

It seems that ReturnParameter property of RuntimeMethodInfo has a property called Name that should help me with this, but it’s comming null.

To get that RuntimeMethodInfo object, i’m getting Members of an instance of B class using this BindingFlags enums:

• BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly

How can I get this field name? This behavior should be the same with properties.

Thanks in advance

Answer 1

I am afraid that’s impossible because the field name is the part of the implemented code and reflection has no clue how to retrieve it.
Persistent frameworks usually use a kind of mapping to provide such information.For example you can use a xml file or you can use attirbutes over your fields to introduce them as key or columns of your table something like this :

[Table(name="MyTable")]    
public class B : A
    {

[Key(column_name="id")]    
public Int32 B_ID;
        public String B_Value;

        public Int32 getID()
        {
            return B_ID;
        }

        public void setID(Int32 value)
        {
            B_ID = value;
        }
    }