Ext.Ajax.request({

                       url: '路径',
                       method : 'post',
                       params : {
                                   传的参数
                                 },

                       success: function (action) {  

                       },

                       failure: function (response, result) {

                       }

                   });

  public void Jurisdiction()

    {

        HttpContext context = HttpContext.Current;

        context.Response.Write("{success:true}");

    }