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C# 树视图中的背景项不是全宽_C#_Wpf_Xaml - Fatal编程技术网

C# 树视图中的背景项不是全宽

C# 树视图中的背景项不是全宽,c#,wpf,xaml,C#,Wpf,Xaml,我是WPF表单的新手,在尝试在TreeViewItem中设置背景时遇到了一个问题 <Window x:Class="wpf_test.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Heig

我是WPF表单的新手,在尝试在TreeViewItem中设置背景时遇到了一个问题

<Window x:Class="wpf_test.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <!--Styles-->
        <Style x:Key="GUIEntity" TargetType="{x:Type Control}">
            <Setter Property="MinWidth" Value="150" />
            <Setter Property="MaxWidth" Value="150" />
        </Style>
        <Style TargetType="TreeViewItem">
            <Setter Property="IsExpanded" Value="True" />
        </Style>
        <!--Data Sources-->
        <x:Array x:Key="BooleanListData" Type="sys:String" xmlns:sys="clr-namespace:System;assembly=mscorlib">
            <sys:String>True</sys:String>
            <sys:String>False</sys:String>
        </x:Array>
    </Window.Resources>
    <Grid>
        <TreeView Name="treeView1" Margin="5" Background="Azure">
            <TreeViewItem Header="ComplexTypeProperty" Margin="5">
                <CheckBox Style="{StaticResource GUIEntity}" Margin="3,3,10,3" Content="Instance" />
                <StackPanel Orientation="Horizontal" Background="LightGray">
                    <Label Margin="0,2,0,0" Content="IsBoolProperty" Width="150" />
                    <ComboBox Margin="5" Style="{StaticResource GUIEntity}" ItemsSource="{StaticResource BooleanListData}" />
                </StackPanel>
            </TreeViewItem>
        </TreeView>
    </Grid>
</Window>

真的
假的
问题是StackPanel中设置的背景没有达到TreeView控件的全宽(向右)。我尝试将
horizontallallignment=“Stretch”
添加到树视图下的所有控件中,但没有效果。StackPanel上的背景宽度仅延伸到组合框的末端

通过在树视图上设置背景,我确认它确实占据了表单的整个宽度,所以这不会成为问题

有人知道如何将背景延伸到树视图大小的末端吗


如何以最简单的方式覆盖此网格?

以下是一篇博客文章,介绍了这个问题并给出了解决方案。就我记忆所及,它对我来说还不错。基本上,您需要重新部署TreeViewItem。很多Xaml,但我认为这是唯一合适的解决方案


这只是用一些视觉效果来扩展这篇老文章

问题声明:默认情况下无法右对齐TreeView中的内容 -基于这里和那里的一些其他评论-我测试过从Xaml中删除任何StackPanel(但这不是问题,因为我可以使用stackpanels在TreeView之外复制所需的设计)

TLDR:解决方法已在以前的评论中发布

XAML:

<Window x:Class="Test"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:DbSeeder.WPF.View"
    mc:Ignorable="d"
    Title="Test" 
    Height="450" 
    Width="800"
    Loaded="Window_Loaded">
<DockPanel>
    <!-- what i want -->
    <StackPanel DockPanel.Dock="Top"
                Margin="5">
        <Label Content="This is the expected structure" 
               FontFamily="Verdana"
               FontWeight="Bold"
               BorderBrush="Black"
               BorderThickness="2"
               HorizontalAlignment="Stretch"
               Background="Orange"
               />
        <Grid>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="5*"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>

            <!-- Buttons -->
            <StackPanel Grid.Column="1" 
                        Orientation="Horizontal" 
                        HorizontalAlignment="Right"
                        Margin="3">
                <Button Content="Button 1"
                        Margin="5"/>
                <Button Content="Button 2"
                        Margin="3"/>
            </StackPanel>

            <!-- Keys -->
            <StackPanel Grid.Column="0"
                        Orientation="Horizontal"
                        HorizontalAlignment="Left"
                        Margin="3" >
                <Label Content="Here should come key 1" Margin="3" BorderBrush="Black" BorderThickness="2"/>
                <Label Content="Here should come key 2" Margin="3" BorderBrush="Black" BorderThickness="2"/>
            </StackPanel>
        </Grid>
    </StackPanel>

    <!-- What I get 2-->
    <Grid 
        ShowGridLines="True"
        DockPanel.Dock="Top"
        Margin="5">

        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>

        <Label Content="This is what I get" 
               FontFamily="Verdana"
               FontWeight="Bold"
               BorderBrush="Black"
               BorderThickness="2"
               Background="Orange"
               Grid.Column="0"
               Grid.Row="0"/>
        <TreeView x:Name="alternative2"
                  Grid.Column="0"
                  Grid.Row="1"
                  HorizontalContentAlignment="Stretch"
                  HorizontalAlignment="Stretch">
            <TreeView.Resources>
                <Style TargetType="{x:Type TreeViewItem}">
                    <Setter Property="HeaderTemplate">
                        <Setter.Value>
                            <DataTemplate>
                                    <Grid ShowGridLines="True"
                                          DockPanel.Dock="Top"
                                          Margin="5">
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition Width="3*"/>
                                            <ColumnDefinition Width="3*"/>
                                            <ColumnDefinition Width="*"/>
                                            <ColumnDefinition Width="*"/>
                                        </Grid.ColumnDefinitions>
                                        <Grid.RowDefinitions>
                                            <RowDefinition Height="Auto"/>
                                        </Grid.RowDefinitions>

                                        <!-- Buttons -->
                                        <Button Content="Button 1"
                                                Grid.Column="2" 
                                                Margin="5"
                                                HorizontalAlignment="Stretch"/>
                                        <Button Content="Button 2"
                                                Grid.Column="3" 
                                                Margin="3"
                                                HorizontalAlignment="Stretch"/>

                                        <!-- Keys -->

                                        <Label Grid.Column="0" 
                                               HorizontalAlignment="Stretch" 
                                               Content="Here should come key 1" 
                                               Margin="3" 
                                               BorderBrush="Black" 
                                               BorderThickness="2"/>
                                        <Label Grid.Column="1"
                                               HorizontalAlignment="Stretch" 
                                               Content="Here should come key 2" 
                                               Margin="3" 
                                               BorderBrush="Black" 
                                               BorderThickness="2"/>
                                    </Grid>
                            </DataTemplate>
                        </Setter.Value>
                    </Setter>
                </Style>
            </TreeView.Resources>
        </TreeView>
    </Grid>
</DockPanel>

以及隐藏的代码(为视图添加种子)

公共部分类测试:窗口
{
受保护的IDictionary JsonFields{get;set;}
公开考试()
{
初始化组件();
var x=新字典()
{
{“键1”,“字符串”},
{“键2”,“字符串2”}
};
var y=新列表()
{
“次级地级5A”,
“次级列表5b”,
};
JsonFields=newdictionary()
{
{“键1”,“字符串”},
{“键2”,“字符串”},
{“键3”,“字符串”},
{“键4-dict”,x},
{“键5-列表”,y}
};
}
已加载私有无效窗口(对象发送器、路由目标)
{
var计数器=0;
foreach(JsonFields.Keys中的var键)
{
计数器++;
var item=new TreeViewItem()
{
标题=键,
ClipToBounds=true
};
如果(计数器%2==0)
{
var子项=新树视图项()
{
Header=$“{item.Header}的子键”,
ClipToBounds=true
};
项目.项目.添加(子项目);
}
备选方案2.项目。添加(项目);
}
}
}

我想这篇文章涵盖了你的问题:“代码”@GeorgySmirnov,它只是在标题上设置背景。这对其他任何事情都没有影响。标题的背景只延伸到文本,而不是全宽。(另外,我不想让宽度向左延伸,只想向右延伸)。从我看到的情况来看,我想在高亮显示的网格上做一个
网格。ColumnSpan=“2”
,这将满足我的需要。但是我该怎么做呢?你有没有试着将TreeViewItem样式上的HorizontalContentAlignment设置为“Stretch”?是的。并将其设置到StackPanel。很难说。。您可以尝试使用Snoop检查visualTree。也许这会给你答案是什么导致了固定的宽度。我也会尝试使用网格而不是StackPanel,并放置三列,第一列Width=“Auto”用于标签,第二列Width=“Auto”用于标签,第三列Width=“*”用于ComboboxTested网格现在正在签出snoop。snoop实际上什么都不做。我确认最新的下载是boken。
public partial class Test : Window
{
    protected IDictionary<string, object> JsonFields { get; set; }

    public Test()
    {
        InitializeComponent();
        var x = new Dictionary<string, string>()
        {
            {"key 1", "string" },
            {"key 2", "string 2" }
        };

        var y = new List<string>()
        {
            "subList5a",
            "subList5b",
        };

        JsonFields = new Dictionary<string, object>()
        {
            { "Key 1", "string" },
            { "Key 2", "string" },
            { "Key 3", "string" },
            { "Key 4 - dict", x },
            { "Key 5 - List", y }
        };
    }

    private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        var counter = 0;
        foreach (var key in JsonFields.Keys)
        {
            counter++;

            var item = new TreeViewItem()
            {
                Header = key,
                ClipToBounds = true
            };

            if (counter % 2 == 0)
            {
                var subItem = new TreeViewItem()
                {
                    Header = $"SubKey of {item.Header}",
                    ClipToBounds = true
                };

                item.Items.Add(subItem);
            }
            alternative2.Items.Add(item);
        }
    }
}