如何创建一个子对象的Expression.Property [英] How can I Create a Expression.Property of a child object

问题描述

通常我以这种方式创建一个表达式。

  ParameterExpression pe = Expression.Parameter（typeof（object1），x ）; 
 
 string Name =property1; 
 
 MemberExpression left = Expression.Property（pe，（object1）.GetProperty（Name））; 
  

它生成 left = x => x.property1

我需要知道如何生成

left = x => x.Object2.property1

如果Name =Object2.property1;对象2是对象1的小孩

提前感谢

解决方案

我不太明白你想要什么是属性链（比如：x.Prop1.Prop2）？

  var pe = Expression.Parameter（typeof（object1））; 
 var property1 = typeof（object1）.GetProperty（Name1）; 
 var property2 = property1.PropertyType.GetProperty（Name2）; 
 var inner = Expression.Property（pe，property1）; 
 var outer = Expression.Property（inner，property2）; 
  

normally I create an expresion in this way.

ParameterExpression pe = Expression.Parameter(typeof(object1), "x");

string Name = "property1";

MemberExpression left = Expression.Property(pe, (object1).GetProperty(Name));

it produces left = x => x.property1

I need to know how can I produce

left = x => x.Object2.property1

if Name = "Object2.property1"; and object2 is a child to object1

Thanks in advance

解决方案

I don't quite understand what you want. Is it a property chain (say: x.Prop1.Prop2)?

var pe = Expression.Parameter(typeof(object1));
var property1 = typeof(object1).GetProperty(Name1);
var property2 = property1.PropertyType.GetProperty(Name2);
var inner = Expression.Property(pe, property1);
var outer = Expression.Property(inner, property2);

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