用于arcgis服务器查询结果的jqgrid json阅读器

问题描述

我需要什么样的 json 阅读器来绘制像 ).幸运的是，服务器 sampleserver1.arcgisonline.com/ArcGIS 支持 JSONP 请求.因此，要使用外部数据填充网格，您可以使用以下代码

$('#grid').jqGrid({url: 'http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/4/query',数据类型:'jsonp'，后数据:$.param({其中:1=1"，返回几何:假，outFields: "ObjectID,NAME,STATE_NAME,CNTY_FIPS",f: "json"}),颜色型号:[{名称:'ObjectID'，标签:'ID'，宽度:60，jsonmap:'attributes.ObjectID'}，{name: 'NAME', label: 'Name', width: 150, jsonmap: 'attributes.NAME'},{name: 'STATE_NAME', label: 'State', width: 120, jsonmap: 'attributes.STATE_NAME'},{名称:'CNTY_FIPS'，标签:'FIPS'，宽度:60，jsonmap:'attributes.CNTY_FIPS'}],toppager:真的，jsonReader:{根:'功能'，重复项:假},加载一次:真实，忽略大小写:真，高度:'自动'});

在此处查看新演示.

UPDATED 2:为了能够使用本地搜索/过滤，应该修改上面的代码.最好把上面看到的postData替换成下面的参数

ajaxGridOptions: { cache: true },prmNames: {search: null, nd: null, sort: null, rows: null, order: null, page: null},发布数据: {其中:1=1"，返回几何:假，outFields: "ObjectID,NAME,STATE_NAME,CNTY_FIPS",f: "json"}

参见相应的演示，其中filterToolbar有效.

what kind of json reader I need to plot data like these in a jqgrid?

Thanks!

解决方案

You have strange questions and all about the jsonReader. In the current case you can use

jsonReader: {
    root: 'features',
    repeatitems: false
}

to read the data. The demo shows how the results can looks like:

UPDATED: How I understand, what you want really to do is to call some external URL which provide you back the JSON. Standard Ajax request can't be done to another server because of security reasons (see same origin policy). Fortunately the server sampleserver1.arcgisonline.com/ArcGIS supports JSONP requests. So to fill the grid with external data you can use the following code

$('#grid').jqGrid({
    url: 'http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/4/query',
    datatype: 'jsonp',
    postData: $.param({
        where: "1=1",
        returnGeometry: false,
        outFields: "ObjectID,NAME,STATE_NAME,CNTY_FIPS",
        f: "json"
    }),
    colModel: [
        {name: 'ObjectID', label: 'ID', width: 60, jsonmap: 'attributes.ObjectID'},
        {name: 'NAME', label: 'Name', width: 150, jsonmap: 'attributes.NAME'},
        {name: 'STATE_NAME', label: 'State', width: 120, jsonmap: 'attributes.STATE_NAME'},
        {name: 'CNTY_FIPS', label: 'FIPS', width: 60, jsonmap: 'attributes.CNTY_FIPS'}
    ],
    toppager: true,
    jsonReader: {
        root: 'features',
        repeatitems: false
    },
    loadonce: true,
    ignoreCase: true,
    height: 'auto'
});

See the new demo here.

UPDATED 2: To be able to use local searching/filtering one should modify the above code. It's better to replace postData which one sees above to the following parameters

ajaxGridOptions: { cache: true },
prmNames: {search: null, nd: null, sort: null, rows: null, order: null, page: null},
postData: {
    where: "1=1",
    returnGeometry: false,
    outFields: "ObjectID,NAME,STATE_NAME,CNTY_FIPS",
    f: "json"
}

See the corresponding demo where filterToolbar works.

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