jQuery Ajax

我们都知道在AjaxPro的方法AjaxPro.Utility.RegisterTypeForAjax(typeof(所在类的类名));会将标记有[Ajax.AjaxMethod]方法注册在客户端。在某项目中，设计模板字段引擎，采用html+jquery实现，这里的数据就难免需要ajax获取，但是团队对于js掌握不一，所以我写了下面辅助类，可以像ajaxpro一样简化ajax的开发。

代码-jQueryInvokeMethodAttribute （此处只做标示方法处理，所以为空）：

[AttributeUsage(AttributeTargets.Method, AllowMultiple=false,Inherited=false)]       public class jQueryInvokeMethodAttribute : Attribute       {       }

代码-jQueryAjaxUtility（分注册脚本和调用ajax事件）：View Code

using System;   using System.Collections.Generic;   using System.Linq;   using System.Text;    namespace Green.Utility   {       public class jQueryAjaxUtility       {           public static string AjaxInvokeParam = "AjaxInvoke";           public static string AjaxInvokeValue = "1";           public static string ResponseCharset = "UTF-8";            protected static System.Web.UI.Page Page           {               get               {                   return System.Web.HttpContext.Current.Handler as System.Web.UI.Page;               }           }            public static void RegisterClientAjaxScript(Type type)           {               if (Page != null)               {                   if (System.Web.HttpContext.Current.Request[AjaxInvokeParam] == AjaxInvokeValue)                   {                       RegisterAjaxInvokeEvent(type);                   }                   else                   {                       RegisterAjaxInvokeScript(type);                   }               }           }            protected static void RegisterAjaxInvokeScript(Type type)           {                Page.ClientScript.RegisterClientScriptBlock(type.GetType(), type.GetType().FullName + "_" + typeof(jQueryAjaxUtility).FullName + "_AjaxInvokeDefaultOption", "window.defaultAjaxOption={type:'GET',cache:false, dataType:'text'};", true);                if (!jQueryUtilityCache.Current.Exists(type))               {                   var methodinfo = type.GetMethods(System.Reflection.BindingFlags.IgnoreCase | System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public).Where(t =>                   {                       var attrs = t.GetCustomAttributes(typeof(jQueryInvokeMethodAttribute), false);                       if (attrs != null && attrs.Length > 0)                           return true;                       return false;                   }).ToList();                    if (methodinfo != null && methodinfo.Count > 0)                   {                       System.Text.StringBuilder sb = new StringBuilder();                       sb.AppendFormat(" window.{0}=function(){{}}; ", type.Name);                       methodinfo.ForEach(t =>                       {                           var parameters = t.GetParameters().Select(p => p.Name).ToArray();                           sb.AppendFormat(" {2}.{0} = function ({1} ajaxOption) {{", t.Name, parameters.Count() > 0 ? string.Join(",", parameters) + "," : "", type.Name);                           sb.Append("if(ajaxOption==null||typeof ajaxOption=='undefined'){ajaxOption={};};");                           var url = Page.Request.RawUrl.IndexOf("?") == -1 ? Page.Request.RawUrl : Page.Request.RawUrl.Substring(0, Page.Request.RawUrl.IndexOf("?") );                           sb.AppendFormat("ajaxOption.url = '{0}';", url);                           var data = "''";                           if (parameters.Count() > 0)                           {                               data = (string.Join(" ", parameters.Select(p => string.Format("'&{0}=' + {0}+", p)).ToArray()));                              data= data.TrimEnd('+');                           }                           sb.AppendFormat("ajaxOption.data = 'method={1}&rn={4}&{2}={3}'+{0};", data, t.Name, AjaxInvokeParam, AjaxInvokeValue,Guid.NewGuid().ToString());                            sb.Append("ajaxOption= jQuery.extend(window.defaultAjaxOption,ajaxOption);");                           sb.Append("jQuery.ajax(ajaxOption);};");                       });                       jQueryUtilityCache.Current.AddScript(type, sb.ToString());                   }               }               var script = jQueryUtilityCache.Current.GetScript(type);               Page.ClientScript.RegisterClientScriptBlock(type.GetType(), type.GetType().FullName + "_" + typeof(jQueryAjaxUtility).FullName + "_AjaxInvoke", script, true);           }            protected string GenertorScript(Type type)           {                return string.Empty;           }            protected static void RegisterAjaxInvokeEvent(Type type)           {                var Request = System.Web.HttpContext.Current.Request;               var Response = System.Web.HttpContext.Current.Response;               var method = Request["method"];               if (string.IsNullOrEmpty(method))                   return;               Response.Clear();               var methodinfo = type.GetMethod(method, System.Reflection.BindingFlags.IgnoreCase | System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public);               if (methodinfo != null)               {                   Response.Charset = ResponseCharset;                   Response.ContentType = string.Join(",", Request.AcceptTypes);                   var param = methodinfo.GetParameters();                   object[] objs = new object[param.Length];                   var i = 0;                   param.ToList().ForEach(t =>                   {                       objs[i++] = Convert.ChangeType(Request[t.Name], t.ParameterType);                   });                   var obj = methodinfo.Invoke(null, objs);                   if (obj != null)                   {                       //序列化                       if (!obj.GetType().IsValueType && obj.GetType() != typeof(string))                       {                           if (Request.AcceptTypes.Contains("text/xml"))                           {                               Response.Write(Green.Utility.SerializerUtility.XmlSerializer(obj));                           }                           else if (Request.AcceptTypes.Contains("application/json"))                           {                               Response.ContentType = "application/json, text/javascript, */*";                               Response.Write(Green.Utility.SerializerUtility.JsonSerializer(obj));                           }                           else                           {                               Response.Write(obj);                           }                        }                       else                       {                           Response.Write(obj);                       }                   }                    Response.Flush();                   Response.Close();                   Response.End();               }           }        }   }  复制代码

为了考虑反射的性能，加入了类级注册脚本方法缓存处理jQueryUtilityCache，具体见demo。

测试：

html:   <form id="form1" runat="server">       <div>           <input id="Button1" type="button" value="button" />       </div>       </form>

后台方法注册Page_Load

Green.Utility.jQueryAjaxUtility.RegisterClientAjaxScript(typeof(_Default));  1：

前台：

_Default.Test("ajax",                                {                                    success: function(e) {                                        alert(e);                                    },                                    dataType: "text"                                });

后台：

[Green.Utility.jQueryInvokeMethod()]      public static string Test(string str)      {          return "hello:" + str;      }

2：

前台ajax：

_Default.TestArrayJson(1, 2, 3,                 {                     success: function(e) {                                                          $.each(e, function(i, n) { alert(n); });                     },                     dataType: "json"                 })

后台：

[Green.Utility.jQueryInvokeMethod()]   public static int[] TestArrayJson(int p1, int p2, int p3)   {       return new int[] { p1, p2, p3 };   }

3：

前台ajax：

_

Default.TestArrayxml("key", "value",               {                   success: function(e) {                       alert(e.key);                       alert(e.Value);                   },                   dataType: "json"               })

后台：

[Green.Utility.jQueryInvokeMethod()]       public static Test TestArrayxml(string key,string value)       {           return new Test() { keykey=key,Value=value};       }