Wpf GridSplitter-无限宽

简单的GridSplitter在某种意义上表现得很奇怪，当我将它向左移动超过MinWidth时，另一列将无限扩展。我错过了什么

<Grid>
    <Grid x:Name="holdergrid" HorizontalAlignment="Stretch">           
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width ="*" MinWidth="300"/>                
            <ColumnDefinition Width ="425"  MinWidth="300"/>
        </Grid.ColumnDefinitions>
        <Button Grid.Column="0" Content="Left"></Button>
        <Button Grid.Column="1" Content="Right"></Button>
        <GridSplitter Name="GridSplitterFolders" HorizontalAlignment="Left" Grid.Column ="1" Width ="10" ResizeBehavior="PreviousAndCurrent" />
    </Grid>
</Grid>

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添加一个宽度设置为“自动”的列定义，以容纳GridSplitter本身，并将ResizeBehavior更改为Previous和Next

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width ="*" MinWidth="300"/>
        <ColumnDefinition Width="Auto"/>
        <ColumnDefinition Width ="425"  MinWidth="300"/>
    </Grid.ColumnDefinitions>
    <Label Content="Left" Grid.Column="0" />
    <GridSplitter HorizontalAlignment="Right" 
              VerticalAlignment="Stretch" 
              Grid.Column="1" ResizeBehavior="PreviousAndNext"
              Width="5" Background="#FFBCBCBC"/>
    <Label Content="Right" Grid.Column="2" />
</Grid>

---

在我看来，当至少有一个列定义被设置为像素值时，就会出现这种错误。如果将列定义更改为星形值，则一切正常。查看您的代码的此修改版本：

<Window x:Class="Gridsplitter.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition></RowDefinition>
            <RowDefinition Height="Auto"></RowDefinition>
        </Grid.RowDefinitions>
        <Grid x:Name="Holdergrid" MaxWidth="{Binding RelativeSource={RelativeSource AncestorType=Window}, Path=ActualWidth}">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" MinWidth="300" />
                <ColumnDefinition Width="Auto" />
                <ColumnDefinition Width="400" MinWidth="300" />
            </Grid.ColumnDefinitions>
            <Button Grid.Column="0" Content="{Binding RelativeSource={RelativeSource Self}, Path=ActualWidth}"></Button>
            <Button Grid.Column="2" Content="{Binding RelativeSource={RelativeSource Self}, Path=ActualWidth}"></Button>
            <GridSplitter Name="GridSplitterFolders" HorizontalAlignment="Center" VerticalAlignment="Stretch" Grid.Column ="1" Width ="5" ResizeBehavior="PreviousAndNext"/>
        </Grid>
        <StackPanel Grid.Row="1" Orientation="Horizontal">
            <TextBlock  Text="{Binding ElementName=Holdergrid, Path=ActualWidth, StringFormat=Actual Width: {0}}"></TextBlock>
            <TextBlock Text="{Binding ElementName=Holdergrid, Path=Width, StringFormat=Width: {0}}" Margin="10 0 0 0"></TextBlock>
            <TextBlock Text="{Binding ElementName=Holdergrid, Path=MaxWidth, StringFormat=Max Width: {0}}" Margin="10 0 0 0"></TextBlock>
        </StackPanel>
    </Grid>
</Window>

---

将栅格拆分器拖动到左侧时，右侧的列将无限增长，甚至超过我限制的MaxWidth。如果将第三列定义中的

Width=“400”

替换为

Width=“*”

，则它可以正常工作。显然，这是使其工作的唯一方法。

feO2x是正确的。当GridSplitter具有混合*和像素值时，会出现无限宽度

水平网格拆分器的正确工作示例应具有：

    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="3*" MinWidth="200"/>
        <ColumnDefinition Width="Auto"/>
        <ColumnDefinition Width="1*" MinWidth="200"/>
    </Grid.ColumnDefinitions>

---

同样重要的是，要使其正常工作，这一点也很重要

如果您仅使用具有星形或自动栅格长度的列定义，则可以删除栅格本身的

MaxWidth

限制。这一点很有效，但请尝试将拆分器移到左侧限制上方。。。现在，当您再次尝试移动它时，直到您首先拖动上一个超调距离，它才开始移动。这似乎是一个bug。请尝试

HorizontalAlignment=“Stretch”

<GridSplitter Grid.Column="1" Width="6" Style="{StaticResource gridSplitterStyleVertical}"
                HorizontalAlignment="Center"
                VerticalAlignment="Stretch"
                ResizeBehavior="PreviousAndNext"
                ResizeDirection="Columns">

HorizontalAlignment="Center"