C＃动态对象初始化不会编译 [英] C# dynamic object initializer won't compile

问题描述

下面的代码似乎是合理的我。它应该创建对象，然后使用动态功能，让我指定我喜欢的任何属性。但是编译器说：ExpandoObject不包含测试的定义。要我说，我知道，那是该死的地步！

 动态例如=新ExpandoObject 
 {
。测试=失败
}; 
  

任何想法，为什么CSC是不是不允许这样做。

$ B $ ：b

另一种方法是手动展开代码到单独的属性分配

 动态例如=新ExpandoObject（）; 
 example.Test =不及格; 
  

而烦恼时，我有很多的属性来分配的。

< DIV CLASS =h2_lin>解决方案

在对象初始化，类型是 ExpandoObject ，而不是动态，这样你就不会得到动态功能。的之后的初始化，您是在类型的变量操作动态等动态功能的是可用那里。

The following code seems reasonable to me. It should create the object and then use the dynamic features to let me assign any properties I like. However the compiler says that "ExpandoObject does not contain a definition for Test". To which I say, "I know, that's the freaking point!"

dynamic example = new ExpandoObject
{
  Test = "fail"
};

Any ideas why csc isn't allowing this.

The alternative is to manually expand the code into individual property assignments.

dynamic example = new ExpandoObject();
example.Test = "fail";

Which is annoying when I have lots of properties to assign.

解决方案

Within the object initializer, the type is ExpandoObject, not dynamic, so you don't get dynamic functionality. After the initializer, you are operating on a variable of type dynamic and so dynamic functionality is available there.

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