Asp.net MVC源码分析--Model Validation(Client端)实现(1)(5)

复制代码
HtmlHelper 构造函数源码:
 1   public HtmlHelper(ViewContext viewContext, IViewDataContainer viewDataContainer, RouteCollection routeCollection) {
 2             if (viewContext == null) {
 3                 throw new ArgumentNullException("viewContext");
 4             }
 5             if (viewDataContainer == null) {
 6                 throw new ArgumentNullException("viewDataContainer");
 7             }
 8             if (routeCollection == null) {
 9                 throw new ArgumentNullException("routeCollection");
10             } www.2cto.com
11
12             ViewContext = viewContext;
13             ViewDataContainer = viewDataContainer;
14             RouteCollection = routeCollection;
15             ClientValidationRuleFactory = (name, metadata) => ModelValidatorProviders.Providers.GetValidators(metadata ?? ModelMetadata.FromStringExpression(name, ViewData), ViewContext).SelectMany(v => v.GetClientValidationRules());
16         }
复制代码
最终我们看到在GetUnobtrusiveValidationAttributes方法内部，MVC 调用了ClientValidationRuleFactory委托来得到clientRules对象它的类型是IEnumerable<ModelClientValidationRule>,这样我们在Model上标记的Client Validation数据就输出到了浏览器端。
--------------------------------------风搔分割线-------------------------------------------------
那么通过以上这些分析我们知道了Server 端如何输出Client Validation数据，那么JavaScript是怎么来进行验证的呢？　
下一篇我们来分析jquery.validate.unobtrusive.js　的源码，这里面实现了MVC的客户端验证逻辑。

 摘自 十一月的雨