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我正在使用此示例，但图表显示在窗口内。我将其从网格中删除，然后将其设置为视图框的子项。

问题是 x 轴最大值和最小值太小以至于点不可见。这些点是从 1 到 500 的简单值。请参阅 x 轴仅适用于 0.045 到 -0.05。y 轴似乎是正确的，因为有 500 个点。 在此处输入图像描述

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:WpfApplication1"
    mc:Ignorable="d"
    xmlns:lvc="clr-namespace:LiveCharts.Wpf;assembly=LiveCharts.Wpf"
    Title="MainWindow" Height="350" Width="525" MouseDoubleClick="Window_MouseDoubleClick">
<Grid x:Name="Grid">
    <lvc:CartesianChart x:Name="Chart" DisableAnimations="True" Zoom="Xy" Pan="Xy">
        <lvc:CartesianChart.Series>
            <lvc:LineSeries Values="{Binding Data}"></lvc:LineSeries>
        </lvc:CartesianChart.Series>
    </lvc:CartesianChart>
</Grid>


using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
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 LiveCharts;

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public ChartValues<double> Data { get; set; } = new ChartValues<double>();

        public MainWindow()
        {
            InitializeComponent();

            DataContext = this;

            Data = new ChartValues<double>(Enumerable.Range(0, 500).Select(x => (double)x));
        }

        private void Window_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            Grid.Children.Remove(Chart);
            Chart.Width = 1920;
            Chart.Height = 1080;
            var viewbox = new Viewbox();
            viewbox.Child = Chart;
            viewbox.Measure(Chart.RenderSize);
            viewbox.Arrange(new Rect(new Point(0, 0), Chart.RenderSize));
            Chart.Update(true, true); //force chart redraw
            viewbox.UpdateLayout();

            SaveToPng(Chart, "chart.png");
            this.Content = viewbox;
        }

        private void SaveToPng(FrameworkElement visual, string fileName)
        {
            var encoder = new PngBitmapEncoder();
            EncodeVisual(visual, fileName, encoder);
        }

        private static void EncodeVisual(FrameworkElement visual, string fileName, BitmapEncoder encoder)
        {
            var bitmap = new RenderTargetBitmap((int)visual.ActualWidth, (int)visual.ActualHeight, 96, 96, PixelFormats.Pbgra32);
            bitmap.Render(visual);
            var frame = BitmapFrame.Create(bitmap);
            encoder.Frames.Add(frame);
            using (var stream = File.Create(System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "out.png"))) encoder.Save(stream);
        }
    }
}

我错过了什么？

4

0 回答 0