很多时候有人问“如何将滚动查看器自动滚动到底部？”。我是一个幸运的人。绑定上下文后，我的 ScrollViewer 毫不费力地向下滚动。我讨厌它！
这是标记：
<UserControl x:Class="TradeSharp.Client.Subscription.Control.PerformerStatistics"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:d3="clr-namespace:Microsoft.Research.DynamicDataDisplay;assembly=DynamicDataDisplay"
xmlns:Charts="clr-namespace:Microsoft.Research.DynamicDataDisplay.Charts;assembly=DynamicDataDisplay"
xmlns:local="clr-namespace:TradeSharp.Client.Subscription.Control" xmlns:ModelView="clr-namespace:TradeSharp.Client.Subscription.ModelView"
xmlns:c="clr-namespace:TradeSharp.Client.Subscription.Control.PieChart" mc:Ignorable="d"
HorizontalAlignment="Stretch"
Height="460"
d:DesignHeight="300"
d:DesignWidth="600" Loaded="UserControlLoaded">
<UserControl.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="../Theme/Theme.xaml" />
</ResourceDictionary.MergedDictionaries>
<x:ArrayExtension Type="{x:Type Brush}" x:Key="brushesPie">
<SolidColorBrush Color="#CACACA"/>
<SolidColorBrush Color="#EAE495"/>
<SolidColorBrush Color="#776611"/>
<SolidColorBrush Color="#888888"/>
<SolidColorBrush Color="#FFFFFF"/>
<SolidColorBrush Color="#880000"/>
<SolidColorBrush Color="#EA8876"/>
<SolidColorBrush Color="#995599"/>
<SolidColorBrush Color="#B0B0B0"/>
</x:ArrayExtension>
</ResourceDictionary>
</UserControl.Resources>
<!-- 3 rows: stats, charts, tables -->
<ScrollViewer Name="ContentScrollViewer" VerticalScrollBarVisibility="Disabled">
<Grid HorizontalAlignment="Stretch" Canvas.Left="0" Canvas.Top="0">
<Grid.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="1,0">
<GradientStop Color="#FF4A4A4A" Offset="0" ></GradientStop>
<GradientStop Color="#FF303030" Offset="0.02" ></GradientStop>
</LinearGradientBrush>
</Grid.Background>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100*" />
</Grid.ColumnDefinitions>
<Grid Grid.Row="0" Grid.Column="0" local:GridMarginSetter.Margin="8">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Label Grid.Row="0" Grid.Column="0" Content="{Binding Path=SignalTitle}" FontSize="13" />
<Button Grid.Row="0" Grid.Column="1" Content="{Binding Path=SubscriptionButtonTitle}"
FontSize="11" Padding="6,4" Click="ButtonClick" />
</Grid>
<!-- stats -->
<Grid Grid.Row="1" Grid.Column="0" local:GridMarginSetter.Margin="8">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Label Grid.Row="0" Grid.Column="0" Content="Доходность, %:" />
<Label Grid.Row="0" Grid.Column="1" Content="{Binding Path=Efficiency.TWR}" ContentStringFormat="{}{0:F2}" />
<Label Grid.Row="0" Grid.Column="2" Content="Кол-во подписчиков:" />
<Label Grid.Row="0" Grid.Column="3" Content="{Binding Path=Performer.SubscriberCount}" />
<Label Grid.Row="0" Grid.Column="4" Content="К. Шарпа:" />
<Label Grid.Row="0" Grid.Column="5" Content="{Binding Path=Efficiency.Sharp}" ContentStringFormat="{}{0:F3}" />
<Label Grid.Row="1" Grid.Column="0" Content="Макс. проседание, %:" />
<Label Grid.Row="1" Grid.Column="1" Content="{Binding Path=Efficiency.MaxDrawdown}" ContentStringFormat="{}{0:F2}" />
<Label Grid.Row="1" Grid.Column="2" Content="Сделок всего:" />
<Label Grid.Row="1" Grid.Column="3" Content="{Binding Path=Efficiency.DealsCount}" />
<Label Grid.Row="1" Grid.Column="4" Content="Сделок открытых:" />
<Label Grid.Row="1" Grid.Column="5" Content="{Binding Path=Efficiency.DealsStillOpened}" />
<Label Grid.Row="2" Grid.Column="0" Content="С.геом. доходность (месяц), %:" />
<Label Grid.Row="2" Grid.Column="1" Content="{Binding Path=Efficiency.ProfitGeomMonth}" ContentStringFormat="{}{0:F3}" />
<Label Grid.Row="2" Grid.Column="2" Content="С.геом. доходность (год), %:" />
<Label Grid.Row="2" Grid.Column="3" Content="{Binding Path=Efficiency.ProfitGeomYear}" ContentStringFormat="{}{0:F3}" />
<Label Grid.Row="2" Grid.Column="4" Content="Ср. прибыль / ср. убыток:" />
<Label Grid.Row="2" Grid.Column="5" Content="{Binding Path=Efficiency.GreedyRatio}" ContentStringFormat="{}{0:F3}" />
<Label Grid.Row="3" Grid.Column="0" Content="Макс. плечо:" />
<Label Grid.Row="3" Grid.Column="1" Content="{Binding Path=Efficiency.MaxLeverage}" ContentStringFormat="{}{0:F2}" />
<Label Grid.Row="3" Grid.Column="2" Content="Сред. плечо:" />
<Label Grid.Row="3" Grid.Column="3" Content="{Binding Path=Efficiency.AvgLeverage}" ContentStringFormat="{}{0:F2}" />
</Grid>
<!-- Profit chart -->
<d3:ChartPlotter Name="plotter"
Grid.Row="2" Grid.Column="0"
Margin="5, 5" LegendVisible="False">
<d3:ChartPlotter.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
<GradientStop Color="#FF4A4A4A" Offset="0" ></GradientStop>
<GradientStop Color="#FF303030" Offset="0.08" ></GradientStop>
</LinearGradientBrush>
</d3:ChartPlotter.Background>
<d3:AxisGrid Foreground="Silver"></d3:AxisGrid>
<d3:VerticalAxisTitle>Доходность, USD</d3:VerticalAxisTitle>
<d3:LineGraph Name="chartProfit"
DataSource="{Binding Path=ListEquity}"
Stroke="White"
StrokeThickness="2"
Height="260"
Width="Auto"
HorizontalAlignment="Stretch">
</d3:LineGraph>
<d3:Plotter.Foreground>
<SolidColorBrush Color="Silver"></SolidColorBrush>
</d3:Plotter.Foreground>
<d3:ChartPlotter.HorizontalAxis>
<Charts:HorizontalDateTimeAxis Name="dateAxis" Foreground="Silver">
</Charts:HorizontalDateTimeAxis>
</d3:ChartPlotter.HorizontalAxis>
</d3:ChartPlotter>
<!-- Доходность, на 1000 -->
<d3:ChartPlotter Name="plotter1000"
Grid.Row="3" Grid.Column="0"
Margin="5, 8" LegendVisible="False">
<d3:ChartPlotter.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
<GradientStop Color="#FF4A4A4A" Offset="0" ></GradientStop>
<GradientStop Color="#FF303030" Offset="0.08" ></GradientStop>
</LinearGradientBrush>
</d3:ChartPlotter.Background>
<d3:AxisGrid Foreground="Silver"></d3:AxisGrid>
<d3:VerticalAxisTitle>Доходность на $1000</d3:VerticalAxisTitle>
<d3:LineGraph Name="chartProfit1000"
DataSource="{Binding Path=ListProfit1000}"
Stroke="White"
StrokeThickness="2"
Height="260"
Width="Auto"
HorizontalAlignment="Stretch">
</d3:LineGraph>
<d3:Plotter.Foreground>
<SolidColorBrush Color="Silver"></SolidColorBrush>
</d3:Plotter.Foreground>
<d3:ChartPlotter.HorizontalAxis>
<Charts:HorizontalDateTimeAxis Name="dateAxis1000" Foreground="Silver">
</Charts:HorizontalDateTimeAxis>
</d3:ChartPlotter.HorizontalAxis>
</d3:ChartPlotter>
<!-- deals' table -->
<Expander Name="dealExpander" Grid.Row="4" Grid.Column="0"
Header="Открытые сделки"
Margin="5" Padding="6"
Expanded="DealExpanderExpanded" IsExpanded="False">
<DataGrid Name="dealTableOpened"
CanUserAddRows="False"
IsReadOnly="True"
AutoGenerateColumns="False"
HeadersVisibility="Column">
<DataGrid.Columns>
<DataGridTextColumn Header="№" Binding="{Binding Path=ID}" Width="14*" />
<DataGridTextColumn Header="Инстр." Binding="{Binding Path=Symbol}" Width="15*" />
<DataGridTextColumn Header="Тип" Binding="{Binding Path=Side, Converter={ModelView:DealSideConverter}}" Width="14*" />
<DataGridTextColumn Header="Объем" Binding="{Binding Path=Volume, Converter={ModelView:DealVolumeConverter}}" Width="19*" />
<DataGridTextColumn Header="Вход" Binding="{Binding Path=PriceEnter, Converter={ModelView:DealPriceConverter}}" Width="22*" />
<DataGridTextColumn Header="Время" Binding="{Binding Path=TimeEnter, StringFormat={}{0:dd.MM.yyyy HH:mm}}" Width="26*" />
</DataGrid.Columns>
</DataGrid>
</Expander>
<!-- some pie chart -->
<Expander Name="dealByTickerExpander" Grid.Row="5" Grid.Column="0"
Header="Сделок по инструменту"
Margin="5" Padding="6"
Expanded="DealByTickerExpanderExpanded"
IsExpanded="False">
<c:PieChartLayout
x:Name="chartCountByTicker"
DataContext="{x:Null}"
PlottedProperty="DealCount"
LegendTitle="Инструмент"
Margin="10">
<c:PieChartLayout.ColorSelector>
<c:IndexedColourSelector Brushes="{StaticResource brushesPie}"/>
</c:PieChartLayout.ColorSelector>
</c:PieChartLayout>
</Expander>
</Grid>
</ScrollViewer>
</UserControl>
后面的代码没有什么特别之处。只是通过将ContentScrollViewer.VerticalScrollBarVisibility设置为禁用然后再次自动来停止滚动的尝试失败。
public void BindData(PerformerStat performer, bool isSubscribed)
{
viewModel = new PerformerStatiscticsViewModel(performer, dateAxis.ConvertToDouble,
dateAxis1000.ConvertToDouble,
isSubscribed);
worker.DoWork += (o, e) =>
{
try
{
viewModel.GetPerformerEfficiency();
}
catch (Exception ex)
{
viewModel = null;
}
};
worker.RunWorkerCompleted += WorkerRunWorkerCompleted;
worker.RunWorkerAsync();
}
private void WorkerRunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (viewModel == null) return;
DataContext = viewModel;
ContentScrollViewer.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;
}