[英]Oxyplot - WPF invalidate plotview
我正在為我的 WPF 應用程序使用 Oxyplot。 我想捕獲一些數據,然后我想在圖表中顯示它們。 我在 XAML 中有這個代碼:
xmlns:oxy="http://oxyplot.org/wpf"
<Window.DataContext>
<local:MainViewModel/>
</Window.DataContext>
<oxy:PlotView Title="{Binding Title}" Margin="241,0,0,179" Name="Plot1" Grid.Column="2">
<oxy:PlotView.Series>
<oxy:LineSeries ItemsSource="{Binding Points}"/>
</oxy:PlotView.Series>
</oxy:PlotView>
和類:
public class MainViewModel
{
/// <summary>
///
/// </summary>
///
public MainViewModel()
{
this.Title = "Sin";
this.Points = new List<DataPoint>();
for (int i = 0; i <= 800; i++)
{
double x = (Math.PI * i) / 400;
double y = Math.Sin(x);
DataPoint p = new DataPoint(x, y);
Points.Add(p);
}
/*this.Points = new List<DataPoint>
{
new DataPoint(0, 4),
new DataPoint(10, 13),
new DataPoint(20, 15),
new DataPoint(30, 16),
new DataPoint(40, 12),
new DataPoint(50, 12)
};*/
}
public string Title { get; private set; }
public IList<DataPoint> Points { get; private set; }
public void Second()
{
this.Points.Clear();
this.Title = "Test";
this.Points = new List<DataPoint>();
for (int i = 0; i <= 800; i++)
{
double x = (Math.PI * i) / 400;
double y = Math.Cos(x);
DataPoint p = new DataPoint(x, 0.5);
Points.Add(p);
}
}
}
事情是,我想要在單擊“Second()”中的按鈕顯示圖后。 它通過調用方法 Second() 並在 Plot1.InvalidatePlot(true) 之后執行,但它什么也不做。 我哪里做錯了,請幫忙? 謝謝
更改為<oxy:LineSeries ItemsSource="{Binding Points, Mode=OneWay}"/>
這將確保對 Points 的更改傳播到您的圖表控件。 其次,在您的 ViewModel 類中實現 INotifyPropertyChanged。 例如;
IList<DataPoint> _points;
public IList<DataPoint> Points { get{return _points;}; private set{ _points = value; OnPropertyChanged("Points");} }
private void OnPropertyChanged(string p)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(p));
}
public void Second()
{
this.Points.Clear();
this.Title = "Test";
this.Points = new List<DataPoint>();
for (int i = 0; i <= 800; i++)
{
double x = (Math.PI * i) / 400;
double y = Math.Cos(x);
DataPoint p = new DataPoint(x, 0.5);
Points.Add(p);
}
/* suggested change */
OnPropertyChanged("Points");
}
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