如何从匿名类型获取属性的值？ [英] How can I get a value of a property from an anonymous type?

问题描述

我有一个由Linq查询填充的数据网格。当数据网格中的焦点行发生变化时，我需要设置一个等于该对象中属性之一的变量。

我尝试过...

  var selectedObject = view.GetRow（rowHandle）; 
 _selectedId = selectedObject.Id; 
  

...但是编译器根本不关心这一点（嵌入式语句不能是声明或带有标签的声明）。

似乎该属性应该易于访问。在运行时检查对象会显示我期望的所有属性，只是我不知道如何访问它们。

如何获取对匿名对象属性的访问权限？ / p>

编辑说明：

我碰巧正在使用DevExpress XtraGrid控件。我用一个Linq查询加载了此控件，该查询由几个不同的对象组成，因此使数据实际上与我已经拥有的任何一个类都不符合（即，我不能将其强制转换为任何对象）。

我正在使用.NET 3.5。

当我查看view.GetRow（rowHandle）方法的结果时，我得到了一个看起来像匿名的类型像这样：

  {ClientId = 7，ClientName = ACME Inc.，乔布斯= 5} 
  

我的目标是从此匿名类型获取ClientId，以便我可以做其他事情（例如用该客户端加载表单）

我在较早的答案中尝试了一些建议，但无法达到可以获取此ClientId的地步。

解决方案

您是否曾经尝试过使用反射？这是一个示例代码片段：

  //使用反射来获取以下匿名类型的值
 var obj = new {ClientId = 7，ClientName = ACME Inc.，Jobs = 5}; 
 System.Type类型= obj.GetType（）; 
 int clientid =（int）type.GetProperty（ ClientId）。GetValue（obj，null）; 
字符串clientname =（string）type.GetProperty（ ClientName）。GetValue（obj，null）; 
 
 //将检索到的值用于任何您想要的... 
  

I have a datagrid populated by a Linq query. When the focused row in the datagrid changes I need to set a variable equal to one of the properties in that object.

I tried...

var selectedObject = view.GetRow(rowHandle);
_selectedId = selectedObject.Id;

... but the compiler doesn't care for this at all ("Embedded statement cannot be a declaration or labled statement").

It seems like the property should be easy to access. Inspecting the object during runtime shows all the properties I expect, I just don't know how to access them.

How can I get access to the anonymous object's property?

Edit for Clarifications:

I happen to be using DevExpress XtraGrid control. I loaded this control with a Linq query which was composed of several different objects, therefore making the data not really conforming with any one class I already have (ie, I cannot cast this to anything).

I'm using .NET 3.5.

When I view the results of the view.GetRow(rowHandle) method I get an anonymous type that looks like this:

{ ClientId = 7, ClientName = "ACME Inc.", Jobs = 5 }

My objective is to get the ClientId from this anonymous type so I can do other things (such as a load a form with that client record in it).

I tried a couple of the suggestions in the early answers but was unable to get to a point where I could get this ClientId.

解决方案

Have you ever tried to use reflection? Here's a sample code snippet:

// use reflection to retrieve the values of the following anonymous type
var obj = new { ClientId = 7, ClientName = "ACME Inc.", Jobs = 5 }; 
System.Type type = obj.GetType(); 
int clientid = (int)type.GetProperty("ClientId").GetValue(obj, null);
string clientname = (string)type.GetProperty("ClientName").GetValue(obj, null);

// use the retrieved values for whatever you want...

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