var a;

       var dwField = new Ext.form.ComboBox({              fieldLabel:'管理员',                         mode: 'local',                                        width:70,                                             id:'user_name',                                     name:'user_name',              editable:false,             allowBlank:true,             typeAhead:true,             triggerAction: 'all',             selectOnFocus:true,             store:Ext.basicdata.user,             emptyText:'-请选择-',               hiddenName:'u_id',                                               //用户ID             valueField: 'user_id',                displayField: 'user_name',                       listeners:{                            select : function(combo, record,index)                       {                            jhField.clearValue(); //可以实现当队下拉值变更时，清空之前井号下拉选项中的值                           SegField.clearValue();                        storejh.proxy= new Ext.data.HttpProxy({url: './DataPageHand.aspx?method=GetAirLine&user_id='+combo.value}); //根据队下拉选项的改变，动态取出对应的井                         a=combo.value                        storejh.load(); //加载航段下拉框的store                                             }                      }        });  

 

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alert(Ext.getCmp('user_name').getValue()); 

alert(Ext.getCmp('user_name').getRawValue());

本文转自左正博客园博客，原文链接：http://www.cnblogs.com/soundcode/archive/2011/11/17/2252788.html，如需转载请自行联系原作者