反思-如何获得财产的属性？

Question

How can i get some parameters (or attributes, if they are called so), with reflection?

MyObject x = new MyObject(...);
..........
var propInfo = x.GetType().GetProperty("something");
if (propInfo != null) {
    xyz= propInfo.GetValue(x,null).Metrics.Width //<------ gives error
}

Answer 1

GetValue returns object .

You need to cast it before calling other members.

MyObject x = new MyObject(...);
//..........
var propInfo = x.GetType().GetProperty("something");
if (propInfo != null) {
    MyPropertyType xyz = (MyPropertyType)propInfo.GetValue(x,null);
    if(xyz != null) {
        double width = xyz.Metrics.Width;
    }
}

Otherwise you would be left with using dynamic object.

MyObject x = new MyObject(...);
//..........
var propInfo = x.GetType().GetProperty("something");
if (propInfo != null) {
    dynamic xyz = propInfo.GetValue(x,null);
    if(xyz != null) {
        double width = xyz.Metrics.Width;
    }
}