构建动态LINQ查询的最佳方法

using System;
using System.Linq;
using System.Linq.Expressions;

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

public class DynamicLinqExample
{
    public static void Main()
    {
        var people = new[]
        {
            new Person { Name = "Alice", Age = 30 },
            new Person { Name = "Bob", Age = 25 },
            new Person { Name = "Charlie", Age = 35 }
        };

        // 构建动态查询
        var query = DynamicLinqQuery(people, "Age", 30);

        // 执行查询并输出结果
        foreach (var person in query)
        {
            Console.WriteLine($"Name: {person.Name}, Age: {person.Age}");
        }
    }

    public static IQueryable<T> DynamicLinqQuery<T>(IQueryable<T> source, string propertyName, object value)
    {
        var parameter = Expression.Parameter(typeof(T), "x");
        var property = Expression.Property(parameter, propertyName);
        var constant = Expression.Constant(value);
        var body = Expression.Equal(property, constant);
        var expression = Expression.Lambda<Func<T, bool>>(body, parameter);
        return source.Where(expression);
    }
}