Question

我有两个课程：

class Customer
{
    public string Fullname { get; set; }
    public string Lastname { get; set; }
    public int Age { get; set; }
}

和

class CustomerDTO
{
    public string Fullname { get; set; }
    public string Lastname { get; set; }
    public int Age { get; set; }
}

现在我有一个表达式Expression<Func<Customer, bool>> expression在层之间传递，我可以将它转换为Expression<Func<CustomerDTO, bool>> expression以便能够使用它，因为它会给编译时错误！

提前致谢

Answer 1

没关系，我做到了

Expression<Func<Customer, bool>> expression = v => v.Fullname == "Johm";
         var par = Expression.Parameter(typeof(CustomerDTO));
         Expression<Func<CustomerDTO, bool>> ex = (Expression<Func<CustomerDTO, bool>>)Expression.Lambda(expression.Body, par);

表达树转换

1 个答案: