public static class Validation{	public static IValidatorBuilder<T> NewValidatorBuilder<T>()  // 創建驗證器創建者	{		return Container.Resolve<IValidatorBuilder<T>>();	}	public static ValidateContext CreateContext(object validateObject,		ValidateOption option = ValidateOption.StopOnFirstFailure, params string[] ruleSetList)  // 創建驗證數據上下文參數	{		var result = Container.Resolve<ValidateContext>();		result.Option = option;		result.RuleSetList = ruleSetList;		result.ValidateObject = validateObject;		return result;	}}

public class ValidatorBuilder<T> : IValidatorBuilder<T>{	public ObservableCollection<IValidateRuleBuilder> Builders { get; set; }	public ValidatorBuilder()	{		Builders = new ObservableCollection<IValidateRuleBuilder>();	}	public IValidator Build()	// 最終build 方法	{		var result = Container.Resolve<IValidatorSetter>();		result.SetRules(Builders.Select(i => i.Build()));		return result;	}	public IFluentRuleBuilder<T, TPRoperty> RuleFor<TProperty>(Expression<Func<T, TProperty>> expression)  // 驗證規則創建者方法	{		ParamHelper.CheckParamNull(expression, "expression", "Can't be null");		var builder = Container.Resolve<IRuleBuilder<T, TProperty>>();		builder.SetValueGetter(expression);		Builders.Add(builder as IValidateRuleBuilder);		return builder;	}	public void RuleSet(string ruleSet, Action<IValidatorBuilder<T>> action)   // 規則分組標志設置方法	{		ParamHelper.CheckParamEmptyOrNull(ruleSet, "ruleSet", "Can't be null");		ParamHelper.CheckParamNull(action, "action", "Can't be null");		var upRuleSet = ruleSet.ToUpper();		var updateRuleSet = new NotifyCollectionChangedEventHandler<IValidateRuleBuilder>((o, e) =>		{			if (e.Action != NotifyCollectionChangedAction.Add) return;			foreach (var item in e.NewItems)			{				item.RuleSet = upRuleSet;			}		});		Builders.CollectionChanged += updateRuleSet;		action(this);		Builders.CollectionChanged -= updateRuleSet;	}	    // 規則分組標志設置方法這樣實現可以簡化設置的格式，讓代碼更清晰    // 比如    //	      var builder = Validation.NewValidatorBuilder<Student>();    //        builder.RuleSet("A", b =>    //        {    //            b.RuleFor(i => i.Name).NotNull()    //                    .Must(i=>i.Length > 10)    //                    .OverrideName("student name")    //                    .OverrideError("no name")    //              .ThenRuleFor(i => i.Age)    //                    .Must(i => i >= 0 && i <= 18)    //                    .OverrideName("student age")    //                    .OverrideError("not student");    //        });}

public class RuleBuilder<T, TValue> : IRuleBuilder<T, TValue>{	public string RuleSet { get; set; }	public Func<object, TValue> ValueGetter { get; protected set; }	public Expression<Func<T, TValue>> ValueExpression { get; protected set; }	public string ValueName { get; set; }	public string Error { get; set; }	public IValidateRuleBuilder NextRuleBuilder { get; set; }	public Func<ValidateContext, bool> Condition { get; set; }	public Func<ValidateContext, string, string, IValidateResult> ValidateFunc { get; set; }	public void SetValueGetter(Expression<Func<T, TValue>> expression)  // 設置獲取值的方法	{		ValueExpression = expression;		var stack = new Stack<MemberInfo>();		var memberExp = expression.Body as MemberExpression;		while (memberExp != null)		{			stack.Push(memberExp.Member);			memberExp = memberExp.Expression as MemberExpression;		}		var p = Expression.Parameter(typeof(object), "p");		var convert = Expression.Convert(p, typeof(T));		Expression exp = convert;		if (stack.Count > 0)		{			while (stack.Count > 0)			{				exp = Expression.MakeMemberaccess(exp, stack.Pop());			}			ValueName = exp.ToString().Replace(convert.ToString() + ".", "");  // 設置默認的屬性名		}		else		{			ValueName = string.Empty;		}		ValueGetter = Expression.Lambda<Func<object, TValue>>(exp, p).Compile(); // 用表達式生成動態獲取不同對象的值的方法	}	public IFluentRuleBuilder<T, TProperty> ThenRuleFor<TProperty>(Expression<Func<T, TProperty>> expression) // 創建子級規則接口方法	{		var builder = Utils.RuleFor(expression);		NextRuleBuilder = builder as IValidateRuleBuilder;		return builder;	}	public IValidateRule Build() // 規則創建方法	{		var rule = Container.Resolve<IValidateRule>();		rule.ValueName = ValueName;		rule.Error = Error;		rule.ValidateFunc = ValidateFunc;		rule.Condition = Condition;		rule.RuleSet = RuleSet;		var nextBuilder = NextRuleBuilder;		if (nextBuilder != null)			rule.NextRule = nextBuilder.Build();		return rule;	}}

public class ValidateRule : IValidateRule{	public Func<ValidateContext, string, string, IValidateResult> ValidateFunc { get; set; }}

public abstract class BaseChecker<T, TProperty>{	public virtual IRuleMessageBuilder<T, TProperty> SetValidate(IFluentRuleBuilder<T, TProperty> builder) // 設置驗證規則邏輯方法	{		ParamHelper.CheckParamNull(builder, "builder", "Can't be null");		var build = builder as IRuleBuilder<T, TProperty>;		build.ValidateFunc = (context, name, error) =>		{			var value = build.ValueGetter(context.ValidateObject);			var result = Container.Resolve<IValidateResult>();			return Validate(result, value, name, error);		};		return build as IRuleMessageBuilder<T, TProperty>;	}	public IValidateResult GetResult()        // 獲取驗證結果實例對象	{		return Container.Resolve<IValidateResult>();	}	public void AddFailure(IValidateResult result, string name, object value, string error) // 添加錯誤信息	{		result.Failures.Add(new ValidateFailure()		{			Name = name,			Value = value,			Error = error		});	}	public abstract IValidateResult Validate(IValidateResult result, TProperty value, string name, string error); // 驗證規則邏輯接口}

public class MustChecker<T, TProperty> : BaseChecker<T, TProperty>{	private Func<TProperty, bool> m_MustBeTrue;	public MustChecker(Func<TProperty, bool> func)	{		ParamHelper.CheckParamNull(func, "func", "Can't be null");		m_MustBeTrue = func;	}	public override IValidateResult Validate(IValidateResult result, TProperty value, string name, string error)	{		if (!m_MustBeTrue(value))		{			AddFailure(result, name, value, error);		}		return result;	}}

public static class Container{	public static ILifetimeScope CurrentScope { get; set; }	public static void Init(Action<ContainerBuilder> action)	{		ParamHelper.CheckParamNull(action, "action", "Can't be null");		Clear();		var builder = new ContainerBuilder();		action(builder);		var container = builder.Build();		CurrentScope = container.BeginLifetimeScope();	}	public static void Init()	{		Init(builder =>		{			builder.RegisterType<RuleSelector>().As<IRuleSelector>().SingleInstance();			builder.RegisterGeneric(typeof(RuleBuilder<,>)).As(typeof(IRuleBuilder<,>)).InstancePerDependency();			builder.Register(c => new ValidateContext() { RuleSelector = c.Resolve<IRuleSelector>() });			builder.RegisterType<ValidateRule>().As<IValidateRule>().InstancePerDependency();			builder.RegisterType<ValidateResult>().As<IValidateResult>().InstancePerDependency();			builder.RegisterGeneric(typeof(ValidatorBuilder<>)).As(typeof(IValidatorBuilder<>)).InstancePerDependency();			builder.RegisterType<Validator>().As<IValidatorSetter>().InstancePerDependency();		});	}	public static void Clear()	{		var scope = CurrentScope;		if (scope != null)			scope.Dispose();	}	public static T Resolve<T>()	{		return CurrentScope.Resolve<T>();	}}

public static class Syntax{	public static IRuleMessageBuilder<T, TProperty> Must<T, TProperty>(this IFluentRuleBuilder<T, TProperty> builder, Func<TProperty, bool> func)	{		return new MustChecker<T, TProperty>(func).SetValidate(builder);	}}

public static class Syntax{	....	public static IRuleMessageBuilder<T, TProperty> When<T, TProperty>(this IRuleMessageBuilder<T, TProperty> builder, Func<TProperty, bool> func)	{		ParamHelper.CheckParamNull(func, "func", "Can't be null");		var ruleBuilder = builder as IRuleBuilder<T, TProperty>;		ruleBuilder.Condition = (context) =>		{			var value = ruleBuilder.ValueGetter(context.ValidateObject);			return func(value);		};		return builder;	}	public static IRuleMessageBuilder<T, TProperty> OverrideName<T, TProperty>(this IRuleMessageBuilder<T, TProperty> builder, string name)	{		(builder as IValidateRuleBuilder).ValueName = name;		return builder;	}	public static IRuleMessageBuilder<T, TProperty> OverrideError<T, TProperty>(this IRuleMessageBuilder<T, TProperty> builder, string error)	{		(builder as IValidateRuleBuilder).Error = error;		return builder;	}}

Container.Init();var builder = Validation.NewValidatorBuilder<Student>();builder.RuleSet("A", b =>{	b.RuleFor(i => i.Name).Must(i=>i.Length > 10)			.OverrideName("student name")			.OverrideError("no name")	  .ThenRuleFor(i => i.Age)			.Must(i => i >= 0 && i <= 18)			.OverrideName("student age")			.OverrideError("not student");});var v = builder.Build();var student = new BigStudent() { Age = 13, Name = "v" };var context = Validation.CreateContext(student);var result = v.Validate(context);Assert.IsNotNull(result);Assert.True(result.IsValid);Assert.True(result.Failures.Count == 0);