如何从UnaryExpression获取类型？

Question

我有一个定义为Expression<Func<Kitten, object>>的属性Expression<Func<Kitten, object>>它是c => c.KittenAge ，其中KittenAge是一个int?

我想要这种类型。

我的代码是：

Expression<Func<Kitten, object>> property = c => c.KittenAge;

var unaryExpression = property.Body as UnaryExpression;

if (Nullable.GetUnderlyingType(unaryExpression.Type) == null)
{
   // Error, must be nullable
}

不幸的是，由于Type是System.Object总是会出现错误行。 我如何获得int?类型int? 从表达？

Answer 1

尝试这个：

    Expression<Func<Kitten, object>> property = c => c.KittenAge;
    var unaryExpression = property.Body as UnaryExpression;
    var propertyExpression = unaryExpression.Operand as MemberExpression;

    if (Nullable.GetUnderlyingType(propertyExpression.Type) == null)
    {
      // Error, must be nullable
    }