NetCore中使用DynamicExpresso、Z.Expressions、LambdaParser进行安字符串求值

例子如下：

Z.Expressions从2.0开始支持了NetCore，但是收费的。其它两者免费。建议使用DynamicExpresso，免费而且速度快。LambdaParser目前支持太少。

static void Main(string[] args)

        {

            Console.OutputEncoding = Encoding.Unicode;

            System.Diagnostics.Stopwatch sp = new Stopwatch();

            sp.Start();

            var code = "i<100&&s.Contains(\"测试\")";

            var interpreter = new DynamicExpresso.Interpreter();

            var result = interpreter.ParseAsDelegate<Func<int, string, bool>>(code, "i", "s");

            //var result = interpreter.ParseAsExpression<Func<int, string, bool>>(code, "i", "s").Compile();

            for (int i = ; i < ; i++)

            {

                var v = result(i, "我在测试" + i);//2213ms

                //Console.WriteLine(v);

            }

            sp.Stop();

            Console.WriteLine("time:" + sp.ElapsedMilliseconds + "ms");

            //System.Diagnostics.Stopwatch sp = new Stopwatch();

            //sp.Start();

            ////var code = @"

            ////     var list = new List<int>() { 1, 2, 3, 4, x };

            ////        var filter = list.Where(x => x < 4);

            ////        return filter.Sum(x => x); ";

            //var code = "i<100&&s.Contains(\"测试\")";

            ////var result = Z.Expressions.Eval.Compile<Func<int, string, bool>>(code, "i", "s");

            //for (int i = 0; i < 100000; i++)

            //{

            //    var v = result(i, "我爱测试");

            //    //Console.WriteLine(v);

            //}

            //sp.Stop();

            //Console.WriteLine("time:" + sp.ElapsedMilliseconds + "ms");

            //var parse = new LambdaParser();

            //while (true)

            //{

            //    try

            //    {

            //        Console.WriteLine(new string('_', 20));

            //        var dics = new Dictionary<string, object>();

            //        dics.Add("x1", 32.0);

            //        dics.Add("x2", 23.0);

            //        dics.Add("x3", 34.5);

            //        dics.Add("x4", 34.5);

            //        dics.Add("s1", "my name is xxxxzhu!");

            //        dics.Add("b1", true);

            //        foreach (var item in dics)

            //        {

            //            Console.WriteLine(item.Key + "\t" + item.Value);

            //        }

            //        Console.WriteLine(new string('_', 20));

            //        Console.WriteLine("expr:");

            //        var expr = Console.ReadLine();

            //        var value = parse.Eval(expr, dics);

            //        Console.WriteLine("value======================" + value);

            //    }

            //    catch (Exception ex) { Console.WriteLine("error====================:" + ex.Message); }

            //}

        }