另一个与WPF DataGrid有关的问题。
我有一个DataGrid,其行已分组,每个组都在Expander控件下。每行有两列。默认情况下,我打开了所有扩展器。第二列的宽度设置为“ *”,并且行标题已关闭。
当我关闭所有扩展器时,布局会更改最小的部分,将扩展器控件向左移动一点。当我打开任何一个扩展器时,它们都会向右移动最小的位。我还注意到,打开扩展器时,列标题在右侧显示了另一列,这使水平滚动条出现。
当扩展器打开时,如何调整datagrid声明以使此附加列不存在/出现?
<Grid>
<ScrollViewer VerticalScrollBarVisibility="Auto"
HorizontalScrollBarVisibility="Disabled" >
<DataGrid AutoGenerateColumns="False"
ItemsSource="{Binding Path=MyCollection}"
GridLinesVisibility="None"
CanUserAddRows="False"
CanUserDeleteRows="False"
CanUserReorderColumns="False"
CanUserSortColumns="False"
CanUserResizeColumns="False"
CanUserResizeRows="False"
HeadersVisibility="Column">
<DataGrid.Resources>
<ResourceDictionary>
<Style x:Key="{x:Type DataGridCell}" TargetType="{x:Type DataGridCell}">
<Setter Property="Background" Value="{x:Null}" />
<Setter Property="BorderBrush" Value="{x:Null}" />
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="{x:Null}" />
<Setter Property="Foreground" Value="Black" />
<Setter Property="BorderBrush" Value="{x:Null}" />
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="{x:Type DataGridRow}" TargetType="{x:Type DataGridRow}">
<Setter Property="Margin" Value="4" />
<Setter Property="Background" Value="{x:Null}" />
<Setter Property="BorderBrush" Value="{x:Null}" />
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="{x:Null}" />
<Setter Property="Foreground" Value="Black" />
<Setter Property="BorderBrush" Value="{x:Null}" />
</Trigger>
</Style.Triggers>
</Style>
</ResourceDictionary>
</DataGrid.Resources>
<DataGrid.GroupStyle>
<GroupStyle>
<GroupStyle.Panel>
<ItemsPanelTemplate>
<DataGridRowsPresenter />
</ItemsPanelTemplate>
</GroupStyle.Panel>
<GroupStyle.ContainerStyle>
<Style TargetType="{x:Type GroupItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type GroupItem}">
<Expander Margin="4"
IsExpanded="True">
<Expander.Header>
<StackPanel Orientation="Horizontal"
Margin="4">
<TextBlock FontWeight="Bold"
FontSize="14"
Text="{Binding Path=Name}" />
</StackPanel>
</Expander.Header>
<ItemsPresenter />
</Expander>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</GroupStyle.ContainerStyle>
</GroupStyle>
</DataGrid.GroupStyle>
<DataGrid.Columns>
<DataGridTemplateColumn Width="Auto">
...
</DataGridTemplateColumn>
<DataGridTemplateColumn Width="*">
...
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
</ScrollViewer>
</Grid>
我认为这部分是hack,部分是真实答案。
hack部分:为了不显示水平滚动条,我只是在DataGrid声明中将其禁用。然后,为确保该列不会在右侧被刮掉,我以用来关闭选择颜色的样式设置行边距和内边距。
实际部分:只要将最外面的网格的第二行的高度设置为“ *”(星号),将垂直滚动条设置为始终显示就可以正常工作。这样可以确保在打开扩展器并且要显示的行过多时,DataGrid将使用适当的空间量。
最终的DataGrid声明如下所示:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Label Content="Import Data Mappings"
FontWeight="Bold"
HorizontalAlignment="Center"
Margin="4"
Padding="4"
Grid.Row="0" />
<DataGrid AutoGenerateColumns="False"
VerticalScrollBarVisibility="Visible"
HorizontalScrollBarVisibility="Disabled"
ItemsSource="{Binding Path=MyGroupedCollection, Mode=OneWay}"
HeadersVisibility="Column"
Grid.Row="1"
... >
<DataGrid.Resources>
<ResourceDictionary>
<Style x:Key="{x:Type DataGridCell}" TargetType="{x:Type DataGridCell}">
<Setter Property="Background" Value="White" />
<Setter Property="BorderBrush" Value="{x:Null}" />
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="White" />
<Setter Property="Foreground" Value="Black" />
<Setter Property="BorderBrush" Value="{x:Null}" />
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="{x:Type DataGridRow}" TargetType="{x:Type DataGridRow}">
<Setter Property="Margin" Value="0,4,0,4" />
<Setter Property="Background" Value="White" />
<Setter Property="BorderBrush" Value="{x:Null}" />
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="Background" Value="White" />
<Setter Property="Foreground" Value="Black" />
<Setter Property="BorderBrush" Value="{x:Null}" />
</Trigger>
</Style.Triggers>
</Style>
</ResourceDictionary>
</DataGrid.Resources>
<DataGrid.GroupStyle>
<GroupStyle>
<GroupStyle.Panel>
<ItemsPanelTemplate>
<DataGridRowsPresenter />
</ItemsPanelTemplate>
</GroupStyle.Panel>
<GroupStyle.ContainerStyle>
<Style TargetType="{x:Type GroupItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type GroupItem}">
<Expander Margin="4"
IsExpanded="True">
<Expander.Header>
<StackPanel Orientation="Horizontal"
Margin="4">
<TextBlock FontWeight="Bold"
FontSize="14"
Text="{Binding Path=Name}" />
</StackPanel>
</Expander.Header>
<ItemsPresenter />
</Expander>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</GroupStyle.ContainerStyle>
</GroupStyle>
</DataGrid.GroupStyle>
<DataGrid.Columns>
<DataGridTemplateColumn Width="Auto">
<DataGridTemplateColumn.HeaderTemplate>
...
</DataGridTemplateColumn.HeaderTemplate>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock .../>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<DataGridTemplateColumn Width="*">
<DataGridTemplateColumn.HeaderTemplate>
...
</DataGridTemplateColumn.HeaderTemplate>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<DockPanel LastChildFill="True">
<Button Style="{DynamicResource ResourceKey=MyButtonStyle}"
Content="Button Text"
Command="{Binding Path=MyButtonCommand}"
DockPanel.Dock="Left"/>
<ComboBox Margin="4"
Padding="4"
SelectedItem="{Binding Path=MySelectedItem, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
ItemsSource="{Binding Path=MyAvailableFields}"
DockPanel.Dock="Left">
<ComboBox.ItemTemplate>
<DataTemplate>
<TextBlock VerticalAlignment="Center"
HorizontalAlignment="Center"
Text="{Binding Path=MyDisplayName}" />
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
</DockPanel>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
</Grid>
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