直接利用rowclick方法即可，代码如下。
listeners:{
'rowclick':function(hospitalGrid,index,e){
var sm = hospitalGrid.getSelectionModel();
if(sm.isSelected(index)){
var selections = hospitalGrid.getSelectionModel().getSelections();
if(selections!=null){
reloadMainDoc(selections[0].get('id'));
}
}
}
}