需要网格列的大小最大为宽度=“自动”并停止

我要做的是在布局网格中管理文本块和组合框 . 需要调整组合框的大小以适合它的选择（宽度=自动） . 如果需要，文本块需要用椭圆修剪，或者当没有修剪时，列应该停止扩展超过文本块的宽度 - 而白色空间应该增长到组合的右侧 . 所以，我正在寻找Width =“*”的混合，同时修剪文本块，并且当没有被修剪时Width =“Auto” . 如果MaxWidth支持“自动”，那将是很好的 .

我不想设置textblock列的特定MaxWidth，因为它将随全球化值而变化 . 如果只有xaml解决方案，我也更喜欢它，但如果没有，哦，好吧 . 此外，网格可能不是正确的容器 .

这是一个例子 . 左列的宽度=“*”，MaxWidth =“150” . 这可以正常工作，但是指定像这样的MaxWidth将不适用于文本块中的全球化文本 . 我需要更有活力的东西 .

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*" MaxWidth="150"/>
        <ColumnDefinition Width="Auto" />
    </Grid.ColumnDefinitions>
    <TextBlock HorizontalAlignment="Left" Text="Input control one" VerticalAlignment="Center" TextTrimming="CharacterEllipsis" Margin="2"/>
    <TextBlock HorizontalAlignment="Left" Text="Input control two" VerticalAlignment="Center" Grid.Row="1" TextTrimming="CharacterEllipsis" Margin="2"/>
    <TextBlock HorizontalAlignment="Left" Text="Input control number three" VerticalAlignment="Center" Grid.Row="2" TextTrimming="CharacterEllipsis" Margin="2"/>
    <ComboBox HorizontalAlignment="Left" d:LayoutOverrides="Height" VerticalAlignment="Center" Grid.Column="1" Margin="2">
        <ComboBoxItem Content="Item One" IsSelected="True"/>
    </ComboBox>
    <ComboBox HorizontalAlignment="Left" VerticalAlignment="Center" Grid.Column="1" Grid.Row="1" Margin="2">
        <ComboBoxItem Content="Item One" />
        <ComboBoxItem Content="Item Number Two" IsSelected="True"/>
    </ComboBox>
</Grid>

解...

感谢Leo帮我解决问题 . 我只需要弄清楚如何从附加属性计算MaxWidth . 关键是要获得列中所有元素的最大所需宽度 . 还必须使用无穷大重新测量元素以获得完整的所需宽度 . 否则，您可以获得修剪的所需宽度 .

/// <summary>
    /// AutoMaxWidth Dependency Property allows a ColumnDefinition to automatically default
    /// it's MaxWidth to the correct width on the Load event of the ColumnDefinition. 
    /// </summary>
    public static readonly DependencyProperty AutoMaxWidthAttachedProperty =
            DependencyProperty.RegisterAttached ("AutoMaxWidth", 
                                                 typeof (bool), 
                                                 typeof (ColumnBehavior),
                                                 new UIPropertyMetadata (false, OnAutoMaxWidthAttachedPropertyChanged));

    /// <summary>
    /// Called when the AutoMaxWidth property has changed values
    /// </summary>
    /// <param name="o">The object this behavior is attached to.</param>
    /// <param name="e">The <see cref="System.Windows.DependencyPropertyChangedEventArgs"/> instance containing the event data.</param>
    static void OnAutoMaxWidthAttachedPropertyChanged (DependencyObject o, DependencyPropertyChangedEventArgs e)
    {
        ColumnDefinition col = (o as ColumnDefinition);
        if (col == null) return;

        if ((bool)e.NewValue)
            col.Loaded += col_Loaded;
        else
            col.Loaded -= col_Loaded;
    }

    static void col_Loaded (object sender, RoutedEventArgs e)
    {
        ColumnDefinition col = sender as ColumnDefinition;
        if (col == null) return;

        Grid g = col.Parent as Grid;
        if (g == null) return;

        int index = g.ColumnDefinitions.IndexOf (col);
        foreach (UIElement el in g.Children)
            if (Grid.GetColumn (el) == index)
            {
                el.Measure (new Size (Double.PositiveInfinity, el.DesiredSize.Height));
                if (col.MaxWidth == Double.PositiveInfinity)
                    col.MaxWidth = el.DesiredSize.Width;
                else
                    col.MaxWidth = Math.Max (col.MaxWidth, el.DesiredSize.Width);
            }
    }