我花了几天时间尝试将我的数据模型绑定到一个系列。我工作正常;但是,我想更改线条颜色。我知道在哪里更改颜色,但图表和系列会忽略我的绑定(是 SolidColorBrush)。如果我在 XAML 中对颜色进行硬编码,它会起作用;但是,如果我尝试将相同的属性绑定到我的视图模型中的颜色属性,它将不起作用。花了太多时间后,我放弃了两个原因。
- 它只是行不通
- 我意识到我需要将“x”个视图模型绑定到图表上,以便一次显示多个线系列。
我最终只是在后面的代码中定义了我的系列,就像这样......
LineSeries BuildLine(DosePointsViewModel model)
{
LineSeries series = new LineSeries();
// styles
Style poly = new Style(typeof(Polyline));
poly.Setters.Add(new Setter(Polyline.StrokeProperty, model.LineColor));
poly.Setters.Add(new Setter(Polyline.StrokeThicknessProperty, 3d));
series.PolylineStyle = poly;
Style pointStyle = new Style(typeof(LineDataPoint));
pointStyle.Setters.Add(new Setter(LineDataPoint.BackgroundProperty, model.LineColor));
series.DataPointStyle = pointStyle;
// binding
series.IsSelectionEnabled = false;
series.IndependentValueBinding = new System.Windows.Data.Binding("Distance");
series.DependentValueBinding = new System.Windows.Data.Binding("Dose");
// X axis
LinearAxis xAxis = new LinearAxis();
xAxis.Title = "Distance";
xAxis.ShowGridLines = false;
xAxis.Interval = 1;
xAxis.Orientation = AxisOrientation.X;
series.IndependentAxis = xAxis;
// Y axis
LinearAxis yAxis = new LinearAxis(); //series.DependentRangeAxis as LinearAxis;
yAxis.Maximum = 5000d;
yAxis.Minimum = -100d;
yAxis.Minimum = model.Points.Min(d => d.Dose) - model.Points.Min(d => d.Dose) * 0.50;
yAxis.Maximum = model.Points.Max(d => d.Dose) + model.Points.Max(d => d.Dose) * 0.05;
yAxis.ShowGridLines = true;
yAxis.Orientation = AxisOrientation.Y;
yAxis.Title = "Dose";
Style s = new Style(typeof(Line));
s.Setters.Add(new Setter(Line.StrokeProperty, new SolidColorBrush(Colors.LightBlue)));
s.Setters.Add(new Setter(Line.StrokeThicknessProperty, 1d));
yAxis.GridLineStyle = s;
series.DependentRangeAxis = yAxis;
return series;
}
现在,我的线条系列的颜色有效。当然,主要原因是我直接通过...设置颜色
poly.Setters.Add(new Setter(Polyline.StrokeProperty, model.LineColor));
pointStyle.Setters.Add(new Setter(LineDataPoint.BackgroundProperty, model.LineColor));
所以,我的问题是这个。我希望能够在图表中添加多个线系列;但是,当我尝试这样做时,只有最后一项被绑定。在代码内部,这是针对正在创建的每个线系列完成的。只有最后一个线系列被添加到图表中。
DosePointsViewModel model = new DosePointsViewModel(_snc, m.Id);
LineSeries series = BuildLine(model);
DoseChart.Series.Clear();
DoseChart.Series.Add(series);