Question

所以标题说明了一切。

我有一个循环遍历发送给我的图表。

每个图形对象都有一个或多个包含标签，数据点和工具提示的对象系列。

每个系列都需要是图表上的单独栏。

例如，我可能有一个像

这样的系列对象

系列1

标题：2013

对象

 label-Jan

 Value-200

 ToolTip-Value = 200

对象

 label-Feb

 Value-400

 ToolTip-Value = 400

还有第二个系列

系列2

标题：2014

对象

 label-Jan

 Value-100

 ToolTip-Value = 100

对象

 label-Feb

 Value-300

 ToolTip-Value = 300

每个系列都需要在图表上显示单独的条形颜色。

尽管我付出了最大的努力，但似乎无法以编程方式实现这一目标。

需要假设返回的未知数量的系列具有未知数量的数据点，因为此控件用于多个位置。

我在

中存储每个点的对象

public class XamDataChartItem: INotifyPropertyChanged 
{
private String _label;

public String Label
{
    get { return _label; }
    set { _label = value;  }
}

private double _yPoint;

public double YPoint
{
    get { return _yPoint; }
    set { _yPoint = value; OnPropertyChanged("YPoint"); }
}

private String _ToolTip;

public String ToolTip
{
    get { return _ToolTip; }
    set { _ToolTip = value; OnPropertyChanged("ToolTip"); }
}   

void OnPropertyChanged(String prop)
{
    PropertyChangedEventHandler handler = PropertyChanged;

    if (handler != null)
    {
        PropertyChanged(this, new PropertyChangedEventArgs(prop));
    }
}
public event PropertyChangedEventHandler PropertyChanged;

}

我将每个点存储在List<XamDataChartItem>

中

private List<XamDataChartItem> _dataCollection;
public List<XamDataChartItem> dataCollection
{
    get { return _dataCollection; }
    set { _dataCollection = value; OnPropertyChanged("dataCollection"); }
}

我的提升方法不会创建多个条形，也不会在X轴上放置正确的标签

            ChartControl control = o as ChartControl;
            if (control == null)
                return;

            ElementList list = args.NewValue as ElementList;
            if (list != null && list.Count >= 1)
            {
                control.dataCollection.Clear();

                foreach (Element data in list)
                {
                    List<XamDataChartItem> NewBarSeries = new List<XamDataChartItem>();

                    CategoryXAxis catX = new CategoryXAxis()
                    {
                        Name = "catX",
                        ItemsSource = NewBarSeries,
                        Label = "{}{Label}",
                        Gap = 10
                    };
                    NumericYAxis numY = new NumericYAxis()
                    {
                        Name = "numY",
                        ToolTip = "{Binding ToolTip}"
                    };

                    foreach (var point in (data["DataPoints"] as ElementList))
                    {
                        var label = point["Label"];
                        var value = point["Value"];
                        var toolTip = point["ToolTip"];
                        var legend = data["LegendLabel"];

                        if (legend != null)
                        {
                            control.Legend = legend.ToString();
                            control.isLegVis = true;
                        }
                        XamDataChartItem item = new XamDataChartItem()
                        {
                            Label = label.ToString(),
                            YPoint = double.Parse(value.ToString()),
                            ToolTip = toolTip.ToString()
                        };

                        NewBarSeries.Add(item);     

                    }


                    ColumnSeries cs = new ColumnSeries()
                    {
                        Title = data["LegendLabel"],
                        ItemsSource = NewBarSeries,
                        ValueMemberPath = "YPoint",
                        XAxis = catX,
                        YAxis = numY
                    };
                    control.masterCollection.Add(NewBarSeries);

                    if (control.chart.Axes.Count == 0)
                    {
                        control.chart.Axes.Add(catX);
                        control.chart.Axes.Add(numY);
                    }
                    control.chart.Series.Add(cs);

                    //Hack to refresh the DataContext
                    //For some reason Observable Collections don't update with this control
                    //You cannot set the Mode it's read only
                    //Invoking OnPropertyChanged from control doesn't work either 
                    control.DataContext = null;
                    control.DataContext = control;                   
                }

这是一个类似的预期结果 enter image description here

Answer 1

所以上述问题的答案非常简单。 99％的元素已经存在

而不是尝试同时动态创建数据点和collumns的集合。分离它们非常有效。

List<List<DataPointObjects>> MasterList 

method NewDataReceived(args){

    foreach Chart{
      new List<DataPointObjects> temp;
         Loop through data{
           Create new data point objects
           add them to temp
         }
      add temp to MasterList
    }

   // Now that we have all of our chart points
  Create xAxis
  Create yAxis
  Foreach chart in MasterList
  {
      Assign xAxis data
      Assign yAxis data

      Build a ColumnSeries
      assign it x and y axis

      if chart doesnt contain these axises then add them

      if chart series doesnt containt this new series then add it
  }
  chart.datacontext = null
  chart.datacontext = this

}

使用多个ColumnSeries以编程方式创建Infragistics XamDataChart

1 个答案: