通过AJAX调用页面后台代码方法实现省级三级联动效果 (简单练习)前台

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3" %>



   
 
   

  
 

  
 
      
  
          
                  
                       
                        
           
                               
                            
                
                       
                                 
                                
                                  
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