Ext.data.JsonStore getCount()返回0条记录web服务

Question

我正在开发Sencha Touch应用程序，无法从我的web服务获取数据。

下面的代码适用于sencha论坛第4页的另一个用户。我已经修改了它以匹配我的web服务输出json。

var myStore = new Ext.data.JsonStore({
        id: 'Agents',
        proxy: new Ext.data.HttpProxy({
            url: 'ws/Service.asmx/GetAgents'
            ,method: 'post'
            ,jsonData: {}
            ,headers: { 'Content-Type': 'application/json; charset=utf-8;'}
            ,reader:{root:'d', record:'rows'}
        }),
        totalProperty: 'd.totalRows',
        idProperty: 'AgentID',
        fields: ['AgentID', 'FirstName','LastName'],
        autoLoad:'true',
        listeners: {
                beforeload: function(myStore, options) {
                    console.log('beforeload: myStore.count = ' + myStore.getCount());
                    console.log(options);
                },
                load: function(myStore, records, options) {
                    console.log('load: ' + myStore.getCount());
                    console.log(records)
                    console.log(options);
                },
                exception: function(misc) {
                    console.log('exception:');
                    console.log(misc);
                }
            }
});

Firebug控制台输出:

beforeload: myStore.count = 0
load: 0
[]
true

Firebug确认从'ws/Service返回的JSON。asmx/GetAgents’是:

{"d":{"success":true,"totalRows":2,"rows":[{"AgentID":1,"FirstName":"Jelena","LastName":"Akerhus"},{"AgentID":2,"FirstName":"Londo","LastName":"Molari"}]}}

然而，当我在控制台输入'myStore.getCount()'时，我得到0条记录。

下面是Service.asmx的部分代码:

[System.Web.Script.Services.ScriptService]
public class Service : System.Web.Services.WebService
{
    [WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json, UseHttpGet = true, XmlSerializeString = false)]
    public object GetAgents()
    {
        List<Agent> agents = new List<Agent>();
        agents.Add( new Agent(1, "Jelena", "Akerhus") );
        agents.Add( new Agent(2, "Londo", "Molari") );
        object data = new { success = true, totalRows = agents.Count, rows = agents };
        return data;
    }
}

Answer 1

这对我有效，我单独注册了模型，但使用了数据类型。我使用带有JsonReader的存储，我删除了您添加的一些额外的东西。希望这对你有用。

      Ext.regModel('Agent', {
        idProperty:'AgentID',
        fields: [{name:'AgentID', type:'int'},{name:'FirstName', type:'string'},{name:'LastName', type:'string'}]
      });
      var store = new Ext.data.Store({
        model  : 'Agent',
        proxy: 
        {
           type:'ajax',
           url:'test.json',
           reader:{
             type:'json',
             root:'d.rows',
             totalProperty: 'd.totalRows'
           }
        },
        autoLoad:'true'
      });
      var list = new Ext.List({
        fullscreen: true,
        itemTpl : '{FirstName} {LastName}',
        store: store
      });
      list.show();