ExtJS文件上传

            <script type="text/javascript">                Ext.onReady(function(){                          var fpFileUpload=new Ext.FormPanel({                              id:'fpFileUpload',                              frame:true,                              fileUpload:true,                              items:[                                  {                                      xtype:'textfield',                                      allowBlank:false,                                      fieldLabel:'选择文件',                                      inputType:'file',                                      name:'fileName'                                  }                              ],                              buttonAlign:'center',                              buttons:[                                  {                                      text:'上传',                                      handler:function(){                                          if(fpFileUpload.form.isValid()){                                              fpFileUpload.form.submit({                                                  method:'post',                                                  url:'Default.aspx',                                                  waitMsg:'文件上传中...',                                                  success: function() {                                                      Ext.Msg.alert("系统提示", "文件上传成功！");                                                  },                                                  failure: function() {                                                      Ext.Msg.alert("系统提示", "文件上传失败！");                                                  }                                              });                                          }else{                                              Ext.Msg.alert("系统提示","请选择文件后再上传！");                                          }                                      }                                  },                                  {                                      text:'取消',                                      handler:function(){                                          winFielUpload.hide();                                      }                                  }                              ]                          });                          var winFielUpload=new Ext.Window({                              id:'win',                              title:'文件上传',                                         width:350,                              height:100,                              layout:'fit',                              autoDestory:true,                              modal:true,                              closeAction:'hide',                              items:[                                  fpFileUpload                              ]                          });                          window.winFielUpload=winFielUpload;                                        });                  function showWindow(){                          winFielUpload.show();                  }                         </script>