Question

我有这个JSP页面。当我运行它时，我没有任何错误。但是不要使用数据网格获取数据。

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ page import="MyPackage.PopulateTextbox" %>
<%@ page import="java.sql.*" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<style type="text/css">
@import "http://localhost:8080/2_8_2012/js/dojo/resources/dojo.css";

@import "http://localhost:8080/2_8_2012/js/dijit/themes/nihilo/nihilo.css";
</style>

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/dojo/1.4/dojo/dojo.xd.js" djConfig="isDebug: false, parseOnLoad: true"></script>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<script type="text/javascript">

dojo.require("dojox.grid.DataGrid");
dojo.require("dojo.data.ItemFileReadStore");
dojo.require("dojo.data.ItemFileWriteStore");
</script>
<%
String temp1;
PopulateTextbox obj = new PopulateTextbox();
temp1 = obj.method();
request.setAttribute("variable", temp1); 
%>

<script type="text/javascript">
dojo.ready(function(){
var myVar = <%= request.getAttribute("variable") %>
var storedata={
            identifier:"table1",
            label:"name",
            items: myVar
    };

var store = new dojo.data.ItemFileReadStore({data: storedata});
    var gridStructure =[[

                      { field: "ID",
                            name: "ID_Emp",
                            width: "40%"
                      },
                      {
                          field: "Names",
                          name: "Name",
                          width: "40%"
                      }

                ]
          ];


     var grid = new dojox.grid.DataGrid({
            id: 'grid',
            store: store,
            structure: gridStructure,
            });
          //document.createElement('div'));

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

        /*Call startup() to render the grid*/
        grid.startup();
});
</script>

<title>Dojo Data</title>
</head>
<body>
<div jsid="grid" id="mygrid" dojoType="dojox.grid.DataGrid" title="Simple Grid" style="width: 500px; height: 150px;">
</div>


</body>
</html>

当我运行此页面时。并转到查看源我得到以下::

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<style type="text/css"> 
@import "http://localhost:8080/2_8_2012/js/dojo/resources/dojo.css";

@import "http://localhost:8080/2_8_2012/js/dijit/themes/nihilo/nihilo.css";
</style>

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/dojo/1.4/dojo/dojo.xd.js" djConfig="isDebug: false, parseOnLoad: true"></script>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<script type="text/javascript"> 

dojo.require("dojox.grid.DataGrid");
dojo.require("dojo.data.ItemFileReadStore");
</script>


<script type="text/javascript"> 
var myVar = [{"ID":1,"Names":"Shantanu"},{"ID":2,"Names":"Mayur"},{"ID":3,"Names":"Rohit"},{"ID":4,"Names":"Jasdeep"},{"ID":5,"Names":"Rakesh"}];
var storedata={
            identifier:"table1",
            label:"name",
            items: myvar
    };
    var gridStructure =[{
    cells:[
                [
                      { field: "ID",
                            name: "ID_Emp",
                            width: "40%", styles: 'text-align: right;'
                      },
                      {
                          field: "Names",
                          name: "Name",
                          width: "40%", styles: 'text-align: right;'
                      }

                ]
          ]
    }];
</script>

<title>Dojo Data</title>
</head>
<body class=nihilo>

<div style="width: 400px; height: 300px;">
  <div data-dojo-type="dojo.data.ItemFileReadStore" data-dojo-id="countryStoreForGrid" data-dojo-props="data:storedata"></div>
  <div id="grid"
    data-dojo-type="dojox.grid.DataGrid"
    data-dojo-props="store:countryStoreForGrid,
    structure:'gridStructure',
    rowsPerPage:40">
  </div>
</div>

</body>
</html>

我在myVar中有数据（用于JSP页面中的ITEMS），因为它在View源页面中显示。但屏幕上仍然没有显示任何内容。我的HTML BODY标记中是否有任何错误。？请帮我解决一下这个。感谢。

Answer 1

尝试更改

var storedata={
        identifier:"table1",

到

var storedata={
        identifier:"ID",

请注意，identifier指定要用作数据

中唯一标识符的项目中的属性

有关详细信息，请参阅http://livedocs.dojotoolkit.org/dojo/data/ItemFileReadStore

Answer 2

您发布的html代码中存在一些错误。

商店数据中的标识符不正确（正如Vijay指出的那样）。

myvar与myVar

不同

我不相信Dojo 1.4使用HTML5数据属性，所以我更新了代码以使用1.7

我添加了网格样式表

<html>
<head>
<style type="text/css"> 
   @import "http://ajax.googleapis.com/ajax/libs/dojo/1.7/dojo/resources/dojo.css";
   @import "http://ajax.googleapis.com/ajax/libs/dojo/1.7/dijit/themes/nihilo/nihilo.css";
   @import "http://ajax.googleapis.com/ajax/libs/dojo/1.7/dojox/grid/resources/Grid.css";
   @import "http://ajax.googleapis.com/ajax/libs/dojo/1.7/dojox/grid/resources/nihiloGrid.css";
</style>

<script src="http://ajax.googleapis.com/ajax/libs/dojo/1.7/dojo/dojo.js" data-dojo-  config="isDebug: true, parseOnLoad: true"></script>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<script type="text/javascript"> 

dojo.require("dojox.grid.DataGrid");
dojo.require("dojo.data.ItemFileReadStore");
</script>

<script type="text/javascript"> 
var myVar = [{"ID":1,"Names":"Shantanu"},{"ID":2,"Names":"Mayur"},{"ID":3,"Names":"Rohit"},{"ID":4,"Names":"Jasdeep"},{"ID":5,"Names":"Rakesh"}];
var storedata={
    identifier: "ID", // This is the property that gives a unique id accross all items.
    label:      "name",
    items:      myVar
};
var gridStructure =[[
  {
    field:  "ID",
    name:   "ID_Emp",
    width:  "40%", styles: 'text-align: right;'
  },
  {
    field:  "Names",
    name:   "Name",
    width:  "40%", styles: 'text-align: right;'
  }
]];
</script>

<title>Dojo Data</title>
</head>
<body class="nihilo">

<div style="width: 400px; height: 300px;">
  <div data-dojo-type="dojo.data.ItemFileReadStore" data-dojo-id="countryStoreForGrid" data-dojo-props="data:storedata"></div>
  <div id="grid"
data-dojo-type="dojox.grid.DataGrid"
data-dojo-props="store:countryStoreForGrid, structure:gridStructure, rowsPerPage:40">
  </div>
</div>

</body>
</html>

dojox.grid.DataGrid数据显示。

2 个答案: