Lambda Expression C#的属性名称

Question

如何在C#中将属性名称转换为Lambda表达式？

像这样: string prop = "Name";到(p => p.Name)

public class Person{
    public string Name{ get; set; } 
}

谢谢!

Answer 1

使用表达式树可以生成lambda表达式.

using System.Linq.Expressions;
public static Expression<Func<T, object>> GetPropertySelector<T>(string propertyName)
{
    var arg = Expression.Parameter(typeof(T), "x");
    var property = Expression.Property(arg, propertyName);
    //return the property as object
    var conv = Expression.Convert(property, typeof(object));
    var exp = Expression.Lambda<Func<T, object>>(conv, new ParameterExpression[] { arg });
    return exp;
}

因为Person你可以称之为:

var exp = GetPropertySelector<Person>("Name");//exp: x=>x.Name