基于.NET中:自动将请求参数绑定到ASPX、ASHX和MVC的

刚开始做AJAX应用的时候，经常要手工解析客户端传递的参数，这个过程极其无聊，而且代码中充斥着：Request["xxx"]之类的代码。

这篇文章的目的就是告诉初学者如何自动将客户端用AJAX发送的参数自动绑定为强类型的成员属性或方法参数。

自动绑定到ASPX和ASHX

框架支持

复制代码 代码如下:

using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 namespace Happy.Web
 {
     public interface IWantAutoBindProperty
     {
     }
 }

复制代码 代码如下:

using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 namespace Happy.Web
 {
     [AttributeUsage(AttributeTargets.Property, AllowMultiple = true)]
     public sealed class AutoBind : Attribute
     {
     }
 }

复制代码 代码如下:

using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 using System.Web;

 using Newtonsoft.Json;

 using Happy.ExtensionMethods.Reflection;

 namespace Happy.Web
 {
     public class JsonBinderModule : IHttpModule
     {
         public void Init(HttpApplication context)
         {
             context.PreRequestHandlerExecute += OnPreRequestHandlerExecute;
         }

         private void OnPreRequestHandlerExecute(object sender, EventArgs e)
         {
             if (!(HttpContext.Current.CurrentHandler is IWantAutoBindProperty))
             {
                 return;
             }

             var properties = HttpContext.Current.CurrentHandler.GetType().GetProperties();

             foreach (var property in properties)
             {
                 if (!property.IsDefined(typeof(AutoBind), true))
                 {
                     continue;
                 }

                 string json = HttpContext.Current.Request[property.Name];

                 var value = JsonConvert.DeserializeObject(json, property.PropertyType);

                 property.SetValue(HttpContext.Current.Handler, value);
             }
         }

         public void Dispose()
         {
         }
     }
 }

复制代码 代码如下:

<?xml version="1.0" encoding="utf-8"?>

 <configuration>

     <system.web>
       <compilation debug="false" targetFramework="4.0" />
       <httpModules>
         <add type="Happy.Web.JsonBinderModule"/>
       </httpModules>
     </system.web>

 </configuration>

复制代码 代码如下: