json数据不能显示在页面里

Question

为什么页面显示的表格里只有标题，没有数据呢？<div id="grid"></div>
<script>
var data = "{totalProperty:100,root:[{id:0,name:'name0',descn:'descn0'},{id:1,name:'name1',descn:'descn1'}]}"
var cm = new Ext.grid.ColumnModel([
       {header:'编号',dataIndex:'id'},
   {header:'名称',dataIndex:'name'},
   {header:'描述',dataIndex:'descn'}
]);
var store = new Ext.data.Store({
     proxy: new Ext.data.MemoryProxy(data),
 reader: new Ext.data.JsonReader({
       totalProperty:'totalProperty',
   root:'root'
 },[
     {name:'id'},
 {name:'name'},
 {name:'descn'}
 ])
})
var grid = new Ext.grid.GridPanel({
     renderTo:'grid',
 autoHeight:true,
 store:store,
 cm:cm
 
})
store.load();
</script>

Answer 1

你看下回传的json 是什么样子的

Answer 2

可能是这里有proxy: new Ext.data.MemoryProxy(data),
你写成proxy: new Ext.data.HttpProxy({ url: "" })试试//后台输出数据

Answer 3

json数据{totalProperty:100,root:[{id:0,name:'name0',descn:'descn0'},{id:1,name:'name1',descn:'descn1'}]}

Answer 4

var cm = new Ext.grid.ColumnModel([
{header:'用户名',dataIndex:'user_username'},
{header:'密码',dataIndex:'user_password'},
{header:'权限',dataIndex:'user_role'}
   ]);
var store = new Ext.data.Store({
// proxy: new Ext.data.MemoryProxy(userStr),
 proxy: new Ext.data.HttpProxy({url:'main.py'}),
 reader:new Ext.data.JsonReader({
   root:'root'
   },[{name:'user_username'},
  {name:'user_password'},
  {name:'user_role'}])
   });
store.load();
var grid = new Ext.grid.GridPanel({
renderTo:'grid',
store:store,
cm:cm,
autoHeight:true
  });
main.py返回的是字符串：{ root:[{ user_username:'admin',user_password:'admin','user_role:'普通用户'},{ user_username:'root',user_password:'123','user_role:'普通用户'},{ user_username:'adminnn',user_password:'123','user_role:'普通用户'}]}

Answer 5

var store = new Ext.data.Store({
  //proxy: new Ext.data.MemoryProxy(data),
data: data,//这样看看
reader: new Ext.data.JsonReader({
totalProperty:'totalProperty',
root:'root'
},[
{name:'id'},
{name:'name'},
{name:'descn'}
])
})

Answer 6

'user_role:'普通用户'
这里多个引号 ，字符串格式的问题啊