Linq“无效的匿名类型成员声明符”当使用来自不同类的属性时 [英] Linq "invalid anonymous type member declarator" when using property from different class

问题描述

我希望从XML文件中获取信息的类知道另一个名为config的类。

这是我想要填充XML信息的模型类。



如果我使用本机属性（例如用户名），我可以使用我的代码。

但是具有模型类的属性（例如config.mailAddress）它不会工作，即使它是一个常规的字符串属性，与原生的'用户名'相同。

另外，如果我将用户名声明为this.username，它也有相同的错误消息

Quote：

错误1无效的匿名类型成员声明符。必须使用成员分配，简单名称或成员访问来声明匿名类型成员。

我尝试过： < br $>

 configFile = XDocument.Load（configFilePath）; 
 
  var  v = 来自 e  in  configFile.Descendants（xmlName）
  select   new  
 {
 username = e.Element（username）.Value， //   native，works  
  this  .username = e.Element（username）.Value， //   native，不起作用 
 config.MailAddress = e.Element（mailAddress）.Value  //   obv not native，抛出指定的错误 
}; 

解决方案

新的{}表示法是创建一个新的匿名类型，这样result.username就是你定义的那个。你不能将config.MailAddress作为匿名类型的属性，这是没有意义的。只需使用

 MailAddress = e.Element .... 

而不是。

The class where I would like to get my information from an XML file knows another class named 'config'.
This is the model-class I'd like to fill with the XML information.

If I use a native property (eg username), I can use my code.
But with the property of the model-class (eg config.mailAddress) it wont work, even tho it's a regular string property, same as the native 'username' one.
Also, if I declare username as this.username, it also has the same error message

Quote:

Error 1 Invalid anonymous type member declarator. Anonymous type members must be declared with a member assignment, simple name or member access.

What I have tried:

configFile=XDocument.Load(configFilePath);

            var v = from e in configFile.Descendants(xmlName)
                    select new
                    {
                        username = e.Element(username).Value, //native, works
                        this.username = e.Element(username).Value, //native, does not                                                                          work
                        config.MailAddress=e.Element(mailAddress).Value //obv not native, throws the stated error
                    };

解决方案

The new { } notation is creating a new anonymous type, such that result.username is what you've defined it as. You can't have config.MailAddress as a property of an anonymous type, it makes no sense. Just use

MailAddress = e.Element....

instead.

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