Asp.net图表多系列显示错误数据

时间:2012-10-11 12:41:10

标签: c# asp.net .net-4.0 charts

以编程方式解决了this problem asp.net多系列图表之后,我在另一个多系列图表中发现了另一个问题:

我想显示月度销售报告,显示已批准和拒绝的提案中过去m个月的变化情况。几个月来,没有任何被拒绝的提案,因此以下查询(C#/ Oracle)会返回一些空结果。

select to_char(c.date,'YYYYMM') ctb_month, 
       c.approved,
       count(distinct c.f1) amt_c, 
       count(b.f1) amt_b, 
       sum(nvl(b.value,0)) sum_values
from bens b 
     join contracts c
     on b.contract_id = c.f1
where b.seller = :USR_ID 
AND c.date 
     BETWEEN add_months(:DATAI,:MONTHS) AND :DATAI
group by to_char(c.date,'YYYYMM'), c.approved
order by ctb_month

OBS:在绑定:MONTHS参数之前,我确保其值为负。

查询结果示例:

CTB_MONTH APPROVED AMT_C AMT_B SUM_VALUES

201209    APPROVED    10    20    1234.56
201209    PENDING      3     3     120.21
201210    APPROVED    12    18     850.52
201210    PENDING      4     4     158.71
201210    REJECTED     1     1      80.40

注意:在这种情况下,201209年当前卖方没有任何被拒绝的提案。

填写图表的代码:

我将较低层传递的数据存储在var report中,并按照APPROVED状态对数据进行过滤:

var approved = queryResult
              .Where(r => r.APPROVED == "APPROVED")
              .ToList()
              ;
var rejected = queryResult
              .Where(r => r.APPROVED == "REJECTED")
              .ToList()
              ;
var pending =  queryResult
              .Where(r => r.APPROVED == "PENDING")
              .ToList()
              ;

然后,我在循环中创建系列

for (int i = 0; i < 6; i++) {
    Series temp = new Series {
        XAxisType = AxisType.Primary,
        XValueType = ChartValueType.DateTime,
        YAxisType = AxisType.Primary,
        //mostra só a quantidade de contratos
        IsValueShownAsLabel = i % 2 == 0 ? true : false,
        ChartType = SeriesChartType.Column,
        CustomProperties = "EmptyPointValue=Zero",
        Legend = "Legenda"
    };
    grafico.Series.Add(temp);
}

手动DataBinding每个系列

// approved contracts
grafico.Series[0].Points.DataBindXY(approved, "MONTH", approved, "AMT_C");
grafico.Series[0].LegendText = "Cont. approved";
// approved bens
grafico.Series[1].Points.DataBindXY(approved, "MONTH", approved, "AMT_B");
grafico.Series[1].LegendText = "Ben. approved";
grafico.Series[1].ChartType = SeriesChartType.Line;
// pending contracts
grafico.Series[2].Points.DataBindXY(pending, "MONTH", pending, "AMT_C");
grafico.Series[2].LegendText = "Cont. pending";
// pending bens
grafico.Series[3].Points.DataBindXY(pending, "MONTH", pending, "AMT_B");
grafico.Series[3].LegendText = "Ben. pending";
grafico.Series[3].ChartType = SeriesChartType.Line;
// rejected contracts
grafico.Series[4].Points.DataBindXY(rejected, "MONTH", rejected, "AMT_C");
grafico.Series[4].LegendText = "Cont. rejected";
// rejected bens
grafico.Series[5].Points.DataBindXY(rejected, "MONTH", rejected, "AMT_B");
grafico.Series[5].LegendText = "Ben. rejected";
grafico.Series[5].ChartType = SeriesChartType.Line;

注意:grafico是我的Chart对象;某些可视设置在<asp:Chart>标记中定义。

当我运行应用程序时,正确绘制了完整的系列,但不完整的系列(201209 / REJECTED,在上面的例子中)是在错误的X坐标中绘制的(201210的值是在在这种情况下,201209的列,就好像控件忽略X方法中传递的DataBindXY值并按顺序绘制值。

有人知道如何解决这个问题吗? 提前谢谢。

[求助]感谢@jbl,图表现在可以在正确的位置绘制值。

代码:

var allMonths = queryResult
    .Select(x => x.MONTH)
    .Distinct()
    .OrderBy(mes => mes)
    ;

foreach (var mes in allMonths) {

    bool hasData = rejected.Any(r => r.MONTH == mes);
    if (hasData == false) {
        rejected.Add(new MonthlyData() { MONTH = mes, APPROVED = "REJECTED" });
    }
    hasData = pending.Any(r => r.MONTH == mes);
    if (hasData == false) {
        pending.Add(new MonthlyData() { MONTH = mes, APPROVED = "PENDING" });
    }
    hasData = approved.Any(r => r.MONTH == mes);
    if (hasData == false) {
        approved.Add(new MonthlyData() { MONTH = mes, APPROVED = "APPROVED" });
    }
}
approved = approved.OrderBy(v => v.MONTH).ToList();
pending = pending.OrderBy(v => v.MONTH).ToList();
rejected = rejected.OrderBy(v => v.MONTH).ToList();

grafico.ChartAreas[0].AxisX.Interval = 1;
grafico.ChartAreas[0].AxisX.IntervalType = DateTimeIntervalType.Months;
grafico.ChartAreas[0].AxisX.IntervalOffset = 1;
grafico.ChartAreas[0].AxisX.IntervalOffsetType = DateTimeIntervalType.Months;

注意: MonthlyData是一个简单的类,用于传输查询结果中每一行的值。

1 个答案:

答案 0 :(得分:1)

我猜您必须使用空数据点http://msdn.microsoft.com/en-us/library/dd456677.aspx来对齐所有系列

这意味着:

  • 构建系列中所有x值的集合
  • 使用您的系列对所有这些x值进行左连接以检测所有缺失点
  • 用空数据点填充缺失点

希望这会有所帮助

编辑:你可以尝试(未测试)类似的东西用于已批准的/ AMT_C系列

var allXvalues = queryResult.select(r=>r.CTB_MONTH).Distinct().OrderBy(month=>month).ToList();


allXvalues
  .ForEach
   (
    xvalue=>
      {
        var p = approved.Where(o=>o.MONTH==xValue).FirstOrDefault();
        if(p==null)
            grafico.Series[0].Points.Add(new DataPoint(p.MONTH,p.AMT_C));
        else
            grafico.Series[0].Points.Add(new DataPoint(xvalue,0){IsEmpty=true});
      }
   );