规则引擎

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//定义规则
using Newtonsoft.Json;
using RulesEngine.Models;

//模拟用户的输入内容
var inputValue = new InputValue
{
    Score = 60
};

var rulesStr = @"[{
                    ""WorkflowName"": ""InputValueWorkflow"",
                    ""Rules"": [
                      {
                        ""RuleName"": ""11"",
                        ""ErrorMessage"": ""考试及格."",
                        ""ErrorType"": ""Error"",
                        ""RuleExpressionType"": ""LambdaExpression"",
                        ""Expression"": ""Score >=60""
                      },
                       {
                        ""RuleName"": ""22"",
                        ""ErrorMessage"": ""考试不及格"",
                         ""ErrorType"": ""Error"",
                        ""RuleExpressionType"": ""LambdaExpression"",
                        ""Expression"": ""Score<60""
                      }
                    ]
                  }] ";

//反序列化Json格式规则字符串
var workflowRules = JsonConvert.DeserializeObject<List<WorkflowRules>>(rulesStr);

//初始化规则引擎
var rulesEngine = new RulesEngine.RulesEngine(workflowRules.ToArray());

//使用规则进行判断，并返回结果
List<RuleResultTree> resultList = await rulesEngine.ExecuteAllRulesAsync("InputValueWorkflow", inputValue);

//返回结果并展示
foreach (var item in resultList)
{
    Console.WriteLine("验证成功：{0}，消息：{1}", item.IsSuccess, item.ExceptionMessage);
}

//Console.ReadLine();

public class InputValue
{
    public double Score { get; set; }
}