OxyPlot 添加 PlotModel

Posted 2023-04-01

【中文标题】OxyPlot 添加 PlotModel

【英文标题】：OxyPlot add PlotModel

【发布时间】：2015-05-30 09:52:41

【问题描述】：

我正在尝试动态添加 OxyPlot 图表，但它不起作用。

<Window x:Class="WpfApplication8.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
<Grid >
    <Grid.RowDefinitions>
        <RowDefinition Height="20"></RowDefinition>
        <RowDefinition></RowDefinition>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
    </Grid.ColumnDefinitions>
    <ItemsControl ItemsSource="Binding TheList" x:Name="MyGrid" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Height="Auto" Grid.Row="1">
        <ItemsControl.ItemsPanel>
            <ItemsPanelTemplate>
                <UniformGrid Rows="Binding Path=Rows,Mode=TwoWay" Columns="Binding Path=Columns,Mode=TwoWay"></UniformGrid>
            </ItemsPanelTemplate>
        </ItemsControl.ItemsPanel>
    </ItemsControl>
    <StackPanel Orientation="Horizontal">
        <Button Command="Binding One">1</Button>
        <Button Command="Binding Four">4</Button>
        <Button Command="Binding Eight">8</Button>
    </StackPanel>
</Grid>

代码看起来像这样。 FourButton 和 EightButton 不起作用。

using GalaSoft.MvvmLight.Command;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.ComponentModel;
using System.Collections.ObjectModel;
using OxyPlot.Wpf;
using OxyPlot;
namespace WpfApplication8

/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
/// 

public partial class MainWindow : Window


    public class ViewModelTest : INotifyPropertyChanged
    
        private PlotModel plotModel;
        public PlotModel PlotModel
        
            get  return plotModel; 
            set  plotModel = value; NotifyPropertyChanged("PlotModel"); 
        

        private ObservableCollection<PlotModel> theList;
        public ObservableCollection<PlotModel> TheList
        
            get  return theList; 
            set  theList = value; NotifyPropertyChanged("TheList"); 
        
        private int rows;
        public int Rows
        
            get  return rows; 
            set  rows = value; NotifyPropertyChanged("Rows"); 
        
        private int columns;
        public int Columns
        
            get  return columns; 
            set  columns = value; NotifyPropertyChanged("Columns"); 
        
        public ViewModelTest()
        
            PlotModel = new PlotModel();
            PlotModel.LegendTitle = "Legend";
            PlotModel.LegendOrientation = LegendOrientation.Horizontal;
            PlotModel.LegendPlacement = LegendPlacement.Outside;
            PlotModel.LegendPosition = LegendPosition.TopRight;
            PlotModel.LegendBackground = OxyColor.FromAColor(200, OxyColors.White);
            PlotModel.LegendBorder = OxyColors.Black;

            TheList = new ObservableCollection<PlotModel>();
            One = new RelayCommand(() => OneButton());
            Four = new RelayCommand(() => FourButton());
            Eight = new RelayCommand(() => EightButton());
        
        public ICommand One  get; set; 
        public ICommand Four  get; set; 
        public ICommand Eight  get; set; 


        public event PropertyChangedEventHandler PropertyChanged;
        private void NotifyPropertyChanged(String info)
        
            if (PropertyChanged != null)
            
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            
        
        public void OneButton()
        
            Rows = 1;
            Columns = 1;
            TheList.Clear();
            for (int i = 0; i < 1; i++)
            
                TheList.Add(PlotModel);
            
        
        public void FourButton()
        
            Rows = 2;
            Columns = 2;
            TheList.Clear();
            for (int i = 0; i < 4; i++)
            
                System.Windows.Controls.Button newBtn = new Button();
                newBtn.Content = i.ToString();
                newBtn.Name = "Button" + i.ToString();
                //TheList.Add(newBtn);
            
        
        public void EightButton()
        
            Rows = 2;
            Columns = 4;
            TheList.Clear();
            for (int i = 0; i < 8; i++)
            
                System.Windows.Controls.Button newBtn = new Button();
                newBtn.Content = i.ToString();
                newBtn.Name = "Button" + i.ToString();
                //TheList.Add(newBtn);
            
        
    
    public MainWindow()
    

        DataContext = new ViewModelTest();
        InitializeComponent();

    

为什么图表不显示？如果我添加按钮，它工作正常。我也尝试使用模板，但没有效果。

【参考方案1】：

要显示一个情节，你需要两件事：

一个模型 知道如何显示此模型的控件

在您后面的代码中，我看到您创建并填充了PlotModel。但是，我没有看到任何知道如何在 XAML 中呈现 PlotModel 的 PlotView。尝试在 XAML 中向ItemsControl 添加以下或类似代码（虽然我没有测试过）：

<ItemsControl.ItemTemplate>
   <DataTemplate>
      <oxy:PlotView Model="Binding"/>
   </DataTemplate>
</ItemsControl.ItemTemplate>

您还应该定义 waht is oxy 例如：xmlns:oxy="http://oxyplot.org/wpf

另请参阅this 示例以供参考。

【讨论】：

它不会像我想要的那样工作。因为如果我使用模板，就像你 adwise 一样。它将只有一个图表。我需要在后面的代码中生成 1-8 个图表。我不想更改代码中的模板。主要问题是将 Oxyplot 添加到 UniformGrid。