Extjs,最好的javascript,js,ajax,Web前端开发框架，一看都会被它华丽的外表所吸引。

Ext.data.EnhancedConnection = function(config){   

 Ext.apply(this,config);   

 Ext.data.EnhancedConnection.superclass.constructor.call(this);   

 }

Ext.extend(Ext.data.EnhancedConnection,Ext.data.Connection,{
  
 webServiceHeaders : {'Content-Type': 'application/json;utf-8'},
   
request : function(o){ 
     
 if(this.fireEvent("beforerequest", this, o) !== false){
 
   var p = o.params;

       var hs = o.headers;
 
       var url = o.url || this.url;
 
       if(typeof url == 'function'){ 

              url = url.call(o.scope||window, o); 

          }    
    
       var method = o.method||this.method||(p ? "POST" : "GET"); 

      //是否为WebService          
      if(!o.isWebService){
 
              //如果不是WebService请求，不改变EXT的请求行为 
             
      if(typeof p == "function"){ 
               
      p = p.call(o.scope||window, o);  
          
        }  
            
      if(typeof p == "object"){
           
       p = Ext.urlEncode(p);

               }
            
      if(this.extraParams){
              
      var extras = Ext.urlEncode(this.extraParams); 
        
         p = p ? (p + '&' + extras) : extras;
      
        }
              
      if(o.form){
          
      var form = Ext.getDom(o.form);  
         
      url = url || form.action;
               
      var enctype = form.getAttribute("enctype");
     
          if(o.isUpload || (enctype && enctype.toLowerCase() == 'multipart/form-data')){ 

                return this.doFormUpload(o, p, url);
                
                       }                  
      var f = Ext.lib.Ajax.serializeForm(form); 
 
                p = p ? (p + '&' + f) : f; 
     
       } 
                           
     if(this.defaultHeaders){
      
            hs = Ext.apply(hs || {}, this.defaultHeaders); 
    
             if(!o.headers){
                  
                    o.headers = hs; 
               
                }              
            }             
     if(method == 'GET' && (this.disableCaching && o.disableCaching !== false) || o.disableCaching === true){
 
                  url += (url.indexOf('?') != -1 ? '&' : '?') + '_dc=' + (new Date().getTime());
           
              } 
                         
     Ext.lib.Ajax.setDefaultPostHeader(true); 
         
     }
         
 else {
            
  //如果有指定WebService方法名称

      if(o.methodName){
  
                url = url + "/" + o.methodName;  
           
                  }              
      if(typeof p == "object"){
  
        //使用不同的请求方式，使用不同的传参方式。 
           if(method == 'GET') { 
                      p = Ext.urlEncode(p);
       
                    }
                
            else{ 
                 
            p = Ext.util.JSON.encode(p);
       
            } 
              }
                           
   hs = Ext.apply(hs || {},this.webServiceHeaders);
            
  if(!o.headers){ 
          
       o.headers = hs;
          
     }
           
   Ext.lib.Ajax.setDefaultPostHeader(false);
     
     }
         
 var cb = { 
     
       success: this.handleResponse,  
      
       failure: this.handleFailure,
          
       scope: this,
              
       argument: {options: o}, 
        
       timeout : this.timeout  
      
    }
                     
 if((method == 'GET' && p) || o.xmlData || o.jsonData){ 
  
               url += (url.indexOf('?') != -1 ? '&' : '?') + p; 
    
                p = '';       
    } 
        
 if(typeof o.autoAbort == 'boolean'){ 

               if(o.autoAbort){ 
     
            this.abort();            
   }           
}
else if(this.autoAbort !== false){ 

              this.abort();        
   }
                  
   this.transId = Ext.lib.Ajax.request(method, url, cb, p, o);
   
       return this.transId;
     
 }else{        
   Ext.callback(o.callback, o.scope, [o, null, null]); 
          return null;      
     }                  
  }
});

Ext.Ajax = new Ext.data.EnhancedConnection({
   autoAbort : false,
 serializeForm :
function(form){  
     return Ext.lib.Ajax.serializeForm(form);
   }});

Ext.data.WebServiceStore = function(){  

 Ext.data.WebServiceStore.superclass.constructor.call(this,{

        //url:'Services/WebService.asmx/GetUsers',  
     
 proxy : new Ext.data.HttpProxy({url:'Services/WebService.asmx/GetUsers',isWebService : true}),  

      // create reader that reads the Topic records   
   
  reader: new  Ext.data.UserJsonReader() 

   }) }

Ext.extend(Ext.data.WebServiceStore, Ext.data.Store);