Javascript 无法保存到Dojo中的存储

Javascript 无法保存到Dojo中的存储,javascript,html,datagrid,dojo,Javascript,Html,Datagrid,Dojo,我正在尝试使用DojoDataGrid进行简单的操作,然后再进行复杂的操作。然而,我现在只能把钱存到商店里。我使用浏览器中的代码和.json文件中的播放器数据,为了方便起见,我现在将所有内容都放在源代码中 当我刷新浏览器时,我刚刚保存的数据不会更新到json文件中。为什么会这样?我该如何修复它 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <h

我正在尝试使用DojoDataGrid进行简单的操作,然后再进行复杂的操作。然而,我现在只能把钱存到商店里。我使用浏览器中的代码和.json文件中的播放器数据,为了方便起见,我现在将所有内容都放在源代码中

当我刷新浏览器时,我刚刚保存的数据不会更新到json文件中。为什么会这样?我该如何修复它

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html dir="ltr">

  <head>
    <link rel="stylesheet" type="text/css" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6/dijit/themes/claro/claro.css" />
     <link rel="stylesheet" type="text/css" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6/dojox/grid/resources/Grid.css" />
     <link rel="stylesheet" type="text/css" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6/dojox/grid/resources/claroGrid.css" />
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/dojo/1.6/dojo/dojo.xd.js" djConfig="parseOnLoad: true"></script>

    <style type="text/css">
      body, html { font-family:helvetica,arial,sans-serif; font-size:90%; }
    </style>
    <style type="text/css">
        .dojoxGrid table { margin: 0; } 
        html, body { width: 100%; height: 100%; margin: 0; }
    </style>

    <script type="text/javascript">
    dojo.require("dojox.grid.DataGrid");
    dojo.require("dojo.data.ItemFileReadStore");
    dojo.require("dojo.data.ItemFileWriteStore");
    dojo.require("dijit.form.Button");

    dojo.addOnLoad(function() {
        // our test data store for this example:
        var store = new dojo.data.ItemFileWriteStore({
          //url: 'players.json'
            data: {
              label: 'pId',
              items: [{"Player":"Wayne Gretzky","Games":"1487","Points":"2857","PPG":"1.92"},
                {"Player":"Mark Messier","Games":"1756","Points":"1887","PPG":"1.07"},
                {"Player":"Gordie Howe","Games":"1767","Points":"1850","PPG":"1.04"},
                {"Player":"Ron Francies","Games":"1731","Points":"1798","PPG":"1.03"},
                {"Player":"Marcel Dionne","Games":"1348","Points":"1771","PPG":"1.31"},
                {"Player":"Steve Yzerman","Games":"1514","Points":"1755","PPG":"1.16"},
                {"Player":"Mario Lemieux","Games":"915","Points":"1723","PPG":"1.88"},
                {"Player":"Joe Sakic","Games":"1378","Points":"1641","PPG":"1.19"},
                {"Player":"Jaromir Jagr","Games":"1273","Points":"1599","PPG":"1.25"},
                {"Player":"Phil Esposito","Games":"1282","Points":"1590","PPG":"1.24"}]}
        });

        // set the layout structure:
        var layout = [{
          field: 'Player',
          name: 'Player',
          width: '200px',
          styles:"text-align:center;"
        },
        {
          field: 'Games',
          name: 'Games Played',
          width: '50px',
          styles:"text-align:center;"
        },
        {
          field: 'Points',
          name: 'Points',
          width: '50px',
          styles:"text-align:center;"
        },
        {
          field: 'PPG',
          name: 'Points Per Game',
          width: '50px',
          styles:"text-align:center;"
        }];

        // create a new grid:
        var grid = new dojox.grid.DataGrid({
          query: {
              Player: '*'
          },
          store: store,
          clientSort: true,
          rowSelector: '20px',
          structure: layout
        },
        document.createElement('div'));

        // append the new grid to the div "gridContainer":
        dojo.byId("gridContainer").appendChild(grid.domNode);

        // Call startup, in order to render the grid:
        grid.startup();
        //dojo.forEach(grid.structure, function(itemData, index, list){
            //itemData.editable = true;
        //});
        var btnAdd = new dijit.form.Button({
            label: "Add",
            onClick: function(){
                grid.store.newItem({
                    Player: "Someone", 
                    Games: "1000", 
                    Points: "1000", 
                    PPG: "1.0"
                });
            }
        }, "btnAdd");
        var btnRemove = new dijit.form.Button({
            label: "Remove",
            onClick: function(){
                var items = grid.selection.getSelected();
                if(items.length){
                    dojo.forEach(items, function(selectedItem){
                        if(selectedItem !== null){
                            grid.store.deleteItem(selectedItem);
                        }
                    });
                } 
            }
        }, "btnRemove");
        var btnSave = new dijit.form.Button({
            label: "Save",
            onClick: function(){    
                grid.store.save({onComplete: saveDone, onError: saveFailed});
            }
        }, "btnSave");
    });

    function saveDone(){
      alert("Done saving.");
    }
    function saveFailed(){
      alert("Save failed.");
    }
  </script>

  </head>



  <body class=" tundra">
    <button id="btnAdd" type="button"></button>
    <button id="btnRemove" type="button"></button>
    <button id="btnSave" type="button"></button>
    <br />
    <div id="gridContainer" style="width: 100%; height: 100%;"></div>
  </body>


</html>

正文,html{字体系列:helvetica,arial,无衬线;字体大小:90%;}
.dojoxGrid表{margin:0;}
html,正文{宽度:100%;高度:100%;边距:0;}
require(“dojox.grid.DataGrid”);
require(“dojo.data.ItemFileReadStore”);
require(“dojo.data.ItemFileWriteStore”);
require(“dijit.form.Button”);
dojo.addOnLoad(函数(){
//本例的测试数据存储:
var store=new dojo.data.ItemFileWriteStore({
//url:'players.json'
数据:{
标签:“pId”,
物品:[{“玩家”:“韦恩·格雷茨基”,“游戏”:“1487”,“点数”:“2857”,“PPG”:“1.92”},
{“玩家”:“马克·梅西耶”,“游戏”:“1756”,“积分”:“1887”,“PPG”:“1.07”},
{“玩家”:“戈迪·豪”,“游戏”:“1767”,“积分”:“1850”,“PPG”:“1.04”},
{“玩家”:“罗恩·弗朗西斯”,“游戏”:“1731”,“积分”:“1798”,“PPG”:“1.03”},
{“玩家”:“马塞尔·迪翁”,“游戏”:“1348”,“点数”:“1771”,“PPG”:“1.31”},
{“玩家”:“史蒂夫·伊泽曼”,“游戏”:“1514”,“积分”:“1755”,“PPG”:“1.16”},
{“玩家”:“马里奥·勒米厄”,“游戏”:“915”,“点数”:“1723”,“PPG”:“1.88”},
{“玩家”:“乔·萨基奇”,“游戏”:“1378”,“点数”:“1641”,“PPG”:“1.19”},
{“玩家”:“Jaromir Jagr”,“游戏”:“1273”,“点数”:“1599”,“PPG”:“1.25”},
{“球员”:“菲尔·埃斯波西托”,“比赛”:“1282”,“积分”:“1590”,“PPG”:“1.24”}]}
});
//设置布局结构:
变量布局=[{
场:“球员”,
姓名:'玩家',
宽度:“200px”,
样式:“文本对齐:居中;”
},
{
领域:“游戏”,
名称:“玩过的游戏”,
宽度:“50px”,
样式:“文本对齐:居中;”
},
{
字段:'点',
名称:'点',
宽度:“50px”,
样式:“文本对齐:居中;”
},
{
字段:'PPG',
名称:'每场比赛点数',
宽度:“50px”,
样式:“文本对齐:居中;”
}];
//创建新网格:
var grid=new dojox.grid.DataGrid({
查询:{
玩家:'*'
},
店:店,,
是的,
行选择器:“20px”,
结构:布局
},
document.createElement('div');
//将新网格附加到div“gridContainer”:
byId(“gridContainer”).appendChild(grid.domNode);
//调用startup以渲染网格:
grid.startup();
//forEach(grid.structure,function(itemData,index,list){
//itemData.editable=true;
//});
var btnAdd=新的dijit.form.Button({
标签:“添加”,
onClick:function(){
grid.store.newItem({
玩家:“某人”,
游戏:“1000”,
积分:“1000”,
PPG:“1.0”
});
}
},“btnAdd”);
var btnRemove=新建dijit.form.Button({
标签:“删除”,
onClick:function(){
var items=grid.selection.getSelected();
if(项目长度){
forEach(项、函数(selectedItem){
如果(selectedItem!==null){
grid.store.deleteItem(selectedItem);
}
});
} 
}
}“BTN删除”);
var btnSave=new dijit.form.Button({
标签:“保存”,
onClick:function(){
保存({onComplete:saveDone,onError:saveFailed});
}
},“btnSave”);
});
函数saveDone(){
警惕(“保存完毕”);
}
函数saveFailed(){
警报(“保存失败”);
}


源代码也在这里:

您需要在服务器端实现一些东西来处理
dojo.data.ItemFileWriteStore
.save()

我修改了您的源代码,以便更容易处理:


另外,就个人而言,在服务器端为ItemFileWriteStore实现某些功能可能有点愚蠢,因为您可以更轻松地将网格与或新的集成起来。

覆盖功能似乎需要在客户端完成?这是否意味着我可以覆盖_saveEverything来执行保存,以便它保存到服务器?如果我使用dojo.store.JsonRest,这个概念类似吗?感谢
dojo.data.ItemFileWriteStore
,是的,您必须重写方法客户端并告诉它如何保存。对于JsonRest和JsonRestStore,不,REST协议中暗示了如何将数据发送到服务器,因此通常不需要在客户端执行任何操作,只需要在服务器端正确地实现它。我可以了解更多关于在服务器端执行什么操作的详细信息吗?真的不知道该怎么办。。。谢谢