json到javascript-谷歌图表

问题描述 投票:4回答:2

过去,我使用以下方法适当地解析json数据,因此可以填充选择框:

var request = null;

request = $.ajax({
  type: "POST",
  url: "url goes here",
  dataType: 'text',
  success: function(returned) {
    returned = JSON.parse(returned)

    $.each(returned, function(selectid, item) {
      var sel = $("#" + selectid).get(0);
      sel.options.length = 0;

      $.each(item, function(i, subitem) {
        sel.options[i] = new Option(subitem.text, subitem.value);
      });
    });
    request = null;
  }
});

我如何将相同的技术应用于下面的代码,但是没有选择框,只需将json解析为drawChart函数?

$.ajax({
  url: 'chart_json.aspx',
  type: 'POST',
  dataType: 'text',
  success: function(data) {
    drawChart(data);
  }
});
javascript jquery json google-visualization
2个回答
4
投票

我认为您的问题出在您的ajax响应中,我将执行以下操作:

您的回应:

{ 
  graphData : [
    ['user1',{v:0.00, f:'0.00'}],
    ['user2',{v:0.00, f:'0.00'}],
    ['user3',{v:0.00, f:'0.00'}],
    ['user4',{v:0.00, f:'0.00'}],
    ['user5',{v:0.00, f:'0.00'}]
  ],
  status : "ok"
}

在您的js中:

$.ajax({
  url: 'get_json.aspx',
  type: 'POST',
  dataType: 'json',//this is important
  success: function(data) {
    //this is not vital, but it's nice to check the response
    if(typeof data === "object" && data.status === "ok"){
        graphData = data.graphData;
        drawVisualization(graphData);
    }
  }
});

希望这会有所帮助,思南。


3
投票
$.ajax({
  url: 'get_json.aspx',
  type: 'POST',
  dataType: 'json', // as noted by Sinan
  success: function(data) {
    drawVisualization(data);
  }
});

function drawVisualization(serverData) {
    var chartData = [];
    for(var i = 0; i < serverData.length; i++) {
      chartData.push([serverData[i][0], serverData[i][1].v]);
    }
    var data = new google.visualization.DataTable();
    data.addColumn('string', 'WIP');
    data.addColumn('number', 'Percentage');
    data.addRows(chartData);
    new google.visualization.PieChart(document.getElementById('visualization')).draw(data, {width: 400, height: 240, is3D:true});     
}

chartData数组需要具有2列(因为您在google.visualization.DataTable上两次调用addColumn),每行都有一个字符串和一个数字。

示例here

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