// Dynamic LINQ

// Doc: https://linq-dynamic.net/parse-lambda

​

// @nuget: System.Linq.Dynamic.Core

using System;

using System.Collections.Generic;

using System.Linq.Expressions;

using System.Linq.Dynamic.Core;

using System.Linq.Dynamic.Core.Parser;

​

public class Program

{

    public static void Main()

    {

        ParameterExpression visionRequest = Expression.Parameter(typeof(VisionRequest), "visionRequest");

​

        var symbols = new[] { visionRequest };

​

        Expression body = new ExpressionParser(symbols, "visionRequest.VisionResults.Any(vr => vr.Class==\"bulls\")", symbols, new ParsingConfig()).Parse(typeof(bool));

​

        LambdaExpression e = Expression.Lambda(body, new ParameterExpression[] { visionRequest });

​

​

        var c = e.Compile();

        var v = new VisionRequest(){VisionResults = new List<VisionResult>(){new VisionResult(){Class="bulls"}}};

        var result = c.DynamicInvoke(v);

​

        Console.WriteLine(result);

    }

}

​

public class VisionRequest {

    public bool IsGoody {get; set;}

    public List<VisionResult> VisionResults { get; set; }

    public VisionRequest()

    {

        IsGoody = false;

        VisionResults = new List<VisionResult>();

    }

}

​

public class VisionResult {

    public string Class {get; set;}

}