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How to get property name using Expression

, 16 Dec 2011 CPOL
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How to get property name using Expression
Expression Trees
Expression trees represent code in a tree-like data structure where each node is an expression, for example, a method call or a binary operation such as x < y.
 
Using the above feature, we can retrieve the property name of class:
 
class County
{
  int CountryCode;
  string CountryName;
}
 
To retreive the name of property: "CountryName" of class, we build the following expression:
 
Country c = new Country();
Expression<Func<string>> exp =() => c.ContryName;
string propName = exp.Body.ToString().Substring(exp.Body.ToString().LastIndexOf('.') + 1);
Console.WriteLine(propName);
 
Use of the GetProperty in this case is redundant, because we need to know the property name to call the method.
 
Please let me know if it is useful.

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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ARanadhir

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Comments and Discussions

 
GeneralRe: In which case, congrats (and thanks)! Keep it up. Especially... PinmemberJonathon Bolster16-Dec-11 10:40 
GeneralHow can you get the property name? Both CountryCode and Coun... PinmemberTiefeng You19-Dec-11 11:54 
GeneralRe: Take a look at this blog post on static reflection: http://b... PinmemberFréderic Cordier24-Dec-11 4:15 
GeneralSometimes you have to use a string. For example, I use NHibe... PinmemberJonathon Bolster16-Dec-11 5:14 
GeneralRe: Thanks Jonathon for explaining the utility. This is the firs... PinmemberARanadhir16-Dec-11 7:48 
GeneralExcuse me, i don't understand the utility ?? PinmemberYeurl_200716-Dec-11 4:53 
QuestionI'm curious as to how this is usefull? PinmemberDaniel Gidman21-Dec-11 9:01 

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