C#动态.字符串属性路径

Question

假设我有这些课程:

internal class A
{
    public B Field { get; set; }
}

internal class B
{
    public int SubField { get; set; }
}

有可能做这样的事情:

    var a = new A();
    a.Field = new B();
    a.Field.SubField = 10;

    dynamic d = a;
    var path = "Field.SubField";

    var i = d.path; // How to look for field <Field.SubField> instead of field <path>?

Answer 1

你可以用反射做到这一点.

static object ReflectOnPath(object o, string path) {
    object value = o;
    string[] pathComponents = path.Split('.');
    foreach (var component in pathComponents) {
        value = value.GetType().GetProperty(component).GetValue(value, null);
    }
    return value;
}

上面绝对没有错误检查; 你必须决定你想怎么做.

用法:

var a = new A();
a.Field = new B();
a.Field.SubField = 10;

string path = "Field.SubField";
Console.WriteLine(ReflectOnPath(a, path));

您甚至可以将其作为扩展方法,以便您可以说

Console.WriteLine(a.ReflectOnPath("Field.SubField"));