从ColumnSeries中删除项

我真的不确定我知道你在做什么，但我希望这对你有帮助:

我拿了样本，在你的代码和样本周围玩了一点。我认为你的代码的问题是，你有一个绑定在你的CategoryAxis，但数据不是添加绑定，而是直接在你的ColumnSeries。使用您的代码，我保留了第一部分，而不是ColumnSeries bar = new ColumnSeries()，我做了:

        ColumnSeries bar = new ColumnSeries
        {
            FillColor = OxyPlot.OxyColors.Yellow,
            ValueField = "Value1",
            Title = "Value1",
            ItemsSource = Items
        };
        tmp.Series.Add(bar);

这样，Items中的数据在您的CategoryAxis和ColumnSeries中都被绑定(当然，如果您需要更多的列来表示Items类的Value2和Value3值，您可以将新的ColumnSeries添加到您的PlotModel系列中)

然后我给窗口添加了一个按钮，并在代码后面添加了:

        Items.RemoveAt(0);
        Model1.InvalidatePlot(true);

这更新了Plot(每次)移除第一个ColumnSeries，包括CategoryAxis中的标签。

窗口后台代码:

using System.Collections.ObjectModel;
using System.Windows;
using OxyPlot;
using OxyPlot.Axes;
using OxyPlot.Series;
namespace OxyPlot_TEST
{
    /// <summary>
    /// Interaction logic for Window2.xaml
    /// </summary>
    public partial class Window2 : Window
    {
        public Window2()
        {
            InitializeComponent();
            // Create some data
            this.Items = new Collection<Item>
                            {
                                new Item {Label = "Apples", Value1 = 37, Value2 = 12, Value3 = 19},
                                new Item {Label = "Pears", Value1 = 7, Value2 = 21, Value3 = 9},
                                new Item {Label = "Bananas", Value1 = 23, Value2 = 2, Value3 = 29}
                            };
            // Create the plot model
            var tmp = new PlotModel { Title = "Column series", LegendPlacement = LegendPlacement.Outside, LegendPosition = LegendPosition.RightTop, LegendOrientation = LegendOrientation.Vertical };
            // Add the axes, note that MinimumPadding and AbsoluteMinimum should be set on the value axis.
            tmp.Axes.Add(new CategoryAxis { ItemsSource = this.Items, LabelField = "Label" });
            tmp.Axes.Add(new LinearAxis { Position = AxisPosition.Left, MinimumPadding = 0, AbsoluteMinimum = 0 });
            ColumnSeries bar = new ColumnSeries
            {
                FillColor = OxyPlot.OxyColors.Yellow,
                ValueField = "Value1",
                Title = "Value1",
                ItemsSource = Items
            };
            ColumnSeries bar1 = new ColumnSeries
            {
                FillColor = OxyPlot.OxyColors.Green,
                ValueField = "Value1",
                Title = "Value1",
                ItemsSource = Items
            };
            ColumnSeries bar2 = new ColumnSeries
            {
                FillColor = OxyPlot.OxyColors.Red,
                ValueField = "Value1",
                Title = "Value1",
                ItemsSource = Items
            };
            tmp.Series.Add(bar);
            tmp.Series.Add(bar1);
            tmp.Series.Add(bar2);
            this.Model1 = tmp;
            this.DataContext = this;
        }
        public Collection<Item> Items { get; set; }
        public PlotModel Model1 { get; set; }
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            Items.RemoveAt(0);
            Model1.InvalidatePlot(true);
        }
    }
    public class Item
    {
        public string Label { get; set; }
        public double Value1 { get; set; }
        public double Value2 { get; set; }
        public double Value3 { get; set; }
    }
}

& lt; & lt ;--------------------------------- 编辑 --------------------------------->>

如果每个类别只需要一个bar，则每个Item只需要一个Value。然后你可以(像前面的例子一样)从集合中删除或甚至添加项目(使用InvalidatePlot更新情节)。后台代码:

using System.Collections.ObjectModel;
using System.Windows;
using OxyPlot;
using OxyPlot.Axes;
using OxyPlot.Series;
namespace OxyPlot_TEST
{
    /// <summary>
    /// Interaction logic for Window2.xaml
    /// </summary>
    public partial class Window2 : Window
    {
        public Window2()
        {
            InitializeComponent();
            // Create some data
            this.Items = new Collection<Item>
                            {
                                new Item {Label = "Apples", Value1 = 37},
                                new Item {Label = "Pears", Value1 = 7},
                                new Item {Label = "Bananas", Value1 = 23}
                            };
            // Create the plot model
            var tmp = new PlotModel { Title = "Column series", LegendPlacement = LegendPlacement.Outside, LegendPosition = LegendPosition.RightTop, LegendOrientation = LegendOrientation.Vertical };
            // Add the axes, note that MinimumPadding and AbsoluteMinimum should be set on the value axis.
            tmp.Axes.Add(new CategoryAxis { ItemsSource = this.Items, LabelField = "Label" });
            tmp.Axes.Add(new LinearAxis { Position = AxisPosition.Left, MinimumPadding = 0, AbsoluteMinimum = 0 });
            ColumnSeries bar = new ColumnSeries
            {
                FillColor = OxyPlot.OxyColors.Black,
                ValueField = "Value1",
                Title = "Value1",
                ItemsSource = Items
            };
            tmp.Series.Add(bar);
            this.Model1 = tmp;
            this.DataContext = this;
        }
        public Collection<Item> Items { get; set; }
        public PlotModel Model1 { get; set; }
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            Items.RemoveAt(0);
            Model1.InvalidatePlot(true);
        }
        private void button2_Click(object sender, RoutedEventArgs e)
        {
            Items.Add(new Item()
            {
                Label = "Strawberrys", Value1 = 55
            });
            Model1.InvalidatePlot(true);
        }
    }
    public class Item
    {
        public string Label { get; set; }
        public double Value1 { get; set; }
    }
}