Dojo中的DataGrid,来自servlet的json数据

时间:2010-03-11 08:22:33

标签: json datagrid dojo

我第一次使用JSON ...... 并希望用我的JSON数据填充我的数据网格, 这是我的JSON数据:

{
  "head": {
    "vars": [ "s" , "fname" , "lname" ]
  } ,
  "results": {
    "bindings": [
      {
        "s": { "type": "uri" , "value": "http://tn.gov.in/Person/41" } ,
        "fname": { "type": "literal" , "value": " } ,
        "lname": { "type": "literal" ,n" }
      } ,
      {
        "s": { "type": "uri" , "value": "http://tn.gov.in/Person/37" } ,
        "fname": { "type": "literal" , "value": "sh" } ,
        "lname": { "type": "literal" , "value": "Vvan" }
      } ,
      {
        "s": { "type": "uri" , "value": "http://tn.gov.in/Person/39" } ,
        "fname": { "type": "literal" , "value": "Vavan " } ,
        "lname": { "type": "literal" , "value": "Sran" }
      }
    ]
  }
}

我想在数据网格中显示fnamelname我应该怎么做? 任何人都可以提供适用于上述JSON的示例代码吗?我尝试了很多例子,我得到一个空白网格

2 个答案:

答案 0 :(得分:6)

这里的关键点是,在dojo网格中使用数据之前,需要首先转换数据。

可以在here找到现场演示。

dojo.require("dojox.grid.DataGrid");
dojo.require("dojo.data.ItemFileReadStore");

dojo.addOnLoad(function() {
    var data = { "head": { "vars": [ "s" , "fname" , "lname" ] } , "results": { "bindings": [ { "s": { "type": "uri" , "value": "http://tn.gov.in/Person/41" } , "fname": { "type": "literal" , "value": "Gayathri" } , "lname": { "type": "literal" , "value": "Vasudevan" } } , { "s": { "type": "uri" , "value": "http://tn.gov.in/Person/37" } , "fname": { "type": "literal" , "value": "Magesh" } , "lname": { "type": "literal" , "value": "Vasudevan" } } , { "s": { "type": "uri" , "value": "http://tn.gov.in/Person/39" } , "fname": { "type": "literal" , "value": "Vasudevan " } , "lname": { "type": "literal" , "value": "Srinivasan" } } ] } };

    var items = dojo.map(data.results.bindings, function(binding) {
        return {fname : binding.fname.value, lname : binding.lname.value};
    });

    var store =  new dojo.data.ItemFileReadStore({
        data : {
          items : items
        }
    });

    _createGrid(store);

    function _createGrid(store) {
        var layout = _getGridLayout(),
            node = dojo.create("div", {}, dojo.byId("grid"), "only");
        var grid = new dojox.grid.DataGrid({
            store : store,
            structure : layout,
            rowsPerPage: 10
        }, node);
        grid.update();
        grid.startup();
        return grid;
   }

   function _getGridLayout() {
      return [[
          { field : "fname", name : "First Name", width : "50%"},
          { field : "lname", name : "Last Name", width : "50%" }
      ]];
   }
});

答案 1 :(得分:0)

加载调用中存在错误,它是异步调用,然后当您尝试构建网格时,您没有数据,并且无法根据需要构建存储。您可以在加载函数中包含所有内容,如下所示:

var items,store;
    var ss = dojo.xhrGet({
        url: "http://localhost:8477/E-Governance/listPerson", 
        handleAs: "json", 
        preventCache: true,
        load: function(data){
            items = dojo.map(data.results.bindings, function(binding) {
                return {
                    fname : binding.fname.value, 
                    lname : binding.lname.value
                };                    
            });
            store =  new dojo.data.ItemFileReadStore({           
                data : {
                    items : items
                }
            });             
            console.log(items[0].fname+' '+items[0].lname);  
            _createGrid(sore);

        }
    });

    console.log('3-4');