【问题标题】:Constructing JSON for JqPlot Bar Charts为 JqPlot 条形图构造 JSON
【发布时间】:2012-05-09 10:32:08
【问题描述】:

我已经设法创建了一些东西来填充 JqPlot 饼图(非常硬编码——它将被自动化)。以下是我的做法:

public ActionResult PieChart()
    {
        return View();
    }

    public ActionResult PieChartJSON()
    {
        List<PieChartData> sampleData = new List<PieChartData>();
        PieChartData test = new PieChartData();
        PieChartData test2 = new PieChartData();
        PieChartData test3 = new PieChartData();
        PieChartData test4 = new PieChartData();
        PieChartData test5 = new PieChartData();
        
        test.Label = "ta";
        test.Value = 3;
        sampleData.Add(test);

        test2.Label = "be";
        test2.Value = 5;
        sampleData.Add(test2);

        test3.Label = "ga";
        test3.Value = 3;
        sampleData.Add(test3);

        test4.Label = "ma";
        test4.Value = 8;
        sampleData.Add(test4);

        test5.Label = "ja";
        test5.Value = 8;
        sampleData.Add(test5);

        return Json(sampleData, JsonRequestBehavior.AllowGet);
    }

jQuery:

jQuery(document).ready(function () {
    urlDataJSON = '/Home/PieChartJSON';

    $.getJSON(urlDataJSON, "", function (data) {
        var dataSlices = [];
        var dataLabels = "";

        $.each(data, function (entryindex, entry) {
            dataSlices.push(entry['Value']);
            dataLabels = dataLabels + entry['Label'];
        });
        options = {
            legend: { show: true },
            title: 'Poll Results',
            seriesDefaults: {
                // Make this a pie chart.
                renderer: jQuery.jqplot.PieRenderer,
                rendererOptions: {
                    // Put data labels on the pie slices.
                    // By default, labels show the percentage of the slice.
                    showDataLabels: true
                }
            }
        }
        var plot = $.jqplot('pieChart', [dataSlices], options);
    });
}); 

https://i.stack.imgur.com/ohup4.png *生成图

我希望能够在下一页上创建类似于条形图的内容:http://www.jqplot.com/tests/bar-charts.php(第二个图表向下)。此条形图是使用以下 jQuery 创建的:

我对 C# 和 Json 还是很陌生,我有点不确定应该如何构造 JSON 数据来创建这个条形图。 谁能帮帮我?

  $(document).ready(function(){
    // For horizontal bar charts, x an y values must will be "flipped"
    // from their vertical bar counterpart.
    var plot2 = $.jqplot('chart2', [
        [[2,1], [4,2], [6,3], [3,4]], 
        [[5,1], [1,2], [3,3], [4,4]], 
        [[4,1], [7,2], [1,3], [2,4]]], {
        seriesDefaults: {
            renderer:$.jqplot.BarRenderer,
            // Show point labels to the right ('e'ast) of each bar.
            // edgeTolerance of -15 allows labels flow outside the grid
            // up to 15 pixels.  If they flow out more than that, they 
            // will be hidden.
            pointLabels: { show: true, location: 'e', edgeTolerance: -15 },
            // Rotate the bar shadow as if bar is lit from top right.
            shadowAngle: 135,
            // Here's where we tell the chart it is oriented horizontally.
            rendererOptions: {
                barDirection: 'horizontal'
            }
        },
        axes: {
            yaxis: {
                renderer: $.jqplot.CategoryAxisRenderer
            }
        }
    });
});

【问题讨论】:

  • 两件事..你想创建饼图还是条形图?你能把你能创建的json放在c#中吗?
  • 我想创建一个条形图。正如您在第一个代码 sn-p 中看到的,我可以为饼图创建 json,但我不知道应该如何构造条形图数据。
  • 检查我在答案中发布的链接。

标签: jquery asp.net-mvc json jqplot


【解决方案1】:

了解您想为给定数据构建条形图,假设您的 JSON 数据以数组形式出现,您可以通过以下方式构建数据切片:

var json = [
    {"Label": "be", "Value": 5}
    ,{"Label": "ga", "Value": 3}
    ,{"Label": "ma", "Value": 8}
    ,{"Label": "ja", "Value": 8}];
var dataSlices = [];
var ticks = [];
$.each(json, function (entryindex, entry) {
    dataSlices.push(entry['Value']);
    ticks.push(entry['Label']);
});

这是demonstrated in the following code,它重用了standard example from jqPlot website

【讨论】:

    【解决方案2】:

    试试这个,工作正常,

     $.getJSON('/mservice/getvalues', function(data) {
            var items1 = new Array();
            var j=0;
            for ( var i in data ) {
                var items = new Array();
                items.push(i,Number(data[i]));
                items1[j++] = items;
            }
    
            var plot1 = jQuery.jqplot('chart1', eval([items1]), {
    
                        seriesDefaults:{
                            renderer:jQuery.jqplot.PieRenderer,
                            rendererOptions:{
                                dataLabels:'value',
                                showDataLabels:true
                            }
                        },
                        legend:{ show:true, location:'e' }
                    }
            );
    
        });
    

    【讨论】:

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