Static Reflection in C#

Attribution.txt

Originally posted by Joel Abrahamsson
http://joelabrahamsson.com/entry/getting-property-and-method-names-using-static-reflection-in-c-sharp

StaticReflection.cs

public static class StaticReflection
{
    public static string GetMemberName<T>(this T instance, Expression<Func<T, object>> expression)
    {
        return GetMemberName(expression);
    }

    public static string GetMemberName<T>(Expression<Func<T, object>> expression)
    {
        if (expression == null)
        {
            throw new ArgumentException("The expression cannot be null.");
        }

        return GetMemberName(expression.Body);
    }

    public static string GetMemberName<T>(this T instance, Expression<Action<T>> expression)
    {
        return GetMemberName(expression);
    }

    public static string GetMemberName<T>(Expression<Action<T>> expression)
    {
        if (expression == null)
        {
            throw new ArgumentException("The expression cannot be null.");
        }

        return GetMemberName(expression.Body);
    }

    private static string GetMemberName(Expression expression)
    {
        if (expression == null)
        {
            throw new ArgumentException("The expression cannot be null.");
        }

        if (expression is MemberExpression)
        {
            // Reference type property or field
            var memberExpression = (MemberExpression) expression;
            return memberExpression.Member.Name;
        }

        if (expression is MethodCallExpression)
        {
            // Reference type method
            var methodCallExpression = (MethodCallExpression) expression;
            return methodCallExpression.Method.Name;
        }

        if (expression is UnaryExpression)
        {
            // Property, field of method returning value type
            var unaryExpression = (UnaryExpression) expression;
            return GetMemberName(unaryExpression);
        }

        throw new ArgumentException("Invalid expression");
    }

    private static string GetMemberName(UnaryExpression unaryExpression)
    {
        if (unaryExpression.Operand is MethodCallExpression)
        {
            var methodExpression = (MethodCallExpression) unaryExpression.Operand;
            return methodExpression.Method.Name;
        }

        return ((MemberExpression) unaryExpression.Operand).Member.Name;
    }
}