Question

My WrapPanel放置在网格*大小的单元格内。现在我有一个置于此WrapPanel内部的视图框。我想将WrapPanel的高度除以3，然后将其绑定到ViewBox。所以我试过使用转换器。但我仍然没有对ViewBox的高度或宽度进行任何更改。

这是我的代码：

<WrapPanel x:Name="wpTilesContainer">
    <Viewbox x:Name="viewbox1"
        Width="{Binding Width, Converter={StaticResource TilesHeightAndWidthConverter}, ElementName=wpTilesContainer}"
        Height="{Binding Height, Converter={StaticResource TilesHeightAndWidthConverter}, ElementName=wpTilesContainer}">
        <Grid>
            <Rectangle Fill="DodgerBlue" Stroke="White" StrokeThickness="3" Height="{Binding Height, ElementName=viewbox1}" Width="{Binding Width, ElementName=viewbox1}"  />
            <TextBlock Text="HAEMOGRAM REPORT" FontSize="32" FontWeight="Bold" Margin="5" Foreground="White" HorizontalAlignment="Center" VerticalAlignment="Center"/>
        </Grid>
    </Viewbox>
</WrapPanel>

以下是Converter的代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Data;

namespace Lab_Lite.Converter
{
    class TilesHeightAndWidthConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            double result;
            result = (double)value / (double)3;
            return result;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }
}

Answer 1

将其绑定到ActualHeight / ActualWidth而不是Height / Width。这是代码：

<WrapPanel x:Name="wpTilesContainer">
<Viewbox x:Name="viewbox1"
    Width="{Binding ActualWidth, Converter={StaticResource TilesHeightAndWidthConverter}, ElementName=wpTilesContainer}"
    Height="{Binding ActualHeight, Converter={StaticResource TilesHeightAndWidthConverter}, ElementName=wpTilesContainer}">
    <Grid>
        <Rectangle Fill="DodgerBlue" Stroke="White" StrokeThickness="3" Height="{Binding Height, ElementName=viewbox1}" Width="{Binding Width, ElementName=viewbox1}"  />
        <TextBlock Text="HAEMOGRAM REPORT" FontSize="32" FontWeight="Bold" Margin="5" Foreground="White" HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </Grid>
</Viewbox>

简单值转换器无法在wpf中工作

1 个答案: