從DataTemplate中綁定到TabItem頭

@埃爾哈斯普Я отредактировал свой вопрос. Я не совсем понимаю, как работать с 數據上下文。Как добавить другое свойство для привязки?

通常為某些特定的數據類型創建數據模板。在ContentControl（包括TabItem）中，數據進入Content屬性（通常來自DataContext屬性），ContentTemplate中的模板指定其呈現。

下面是一個具有一個字符串屬性的數據類型的示例。該示例使用BaseInpc類。

using Simplified;

namespace TabItemHeaderBinding
{
    public class TabItemContent : BaseInpc
    {
        private string _title;

        public string Title { get => _title; set =>Set(ref _title, value); }
    }
}

典型的WPF是MVVM模式的實現。在本例中，您將收到TabControl源代碼中的元素集合<TabControl ItemsSource =" {Binding CollectionProperty} "...>。在本例中，TabControl將為DataContext和Content中它將傳遞相應集合項的每個項自動創建一個TabItem。元素模板、標頭等中的綁定必須相對于此元素指定。

您沒有MVVM，所以我將展示一個簡單的示例，其中對初始代碼的更改最小。

<Window x:Class="TabItemHeaderBinding.ThbWindow"
        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:TabItemHeaderBinding"
        mc:Ignorable="d"
        Title="ThbWindow" Height="450" Width="800">
    <FrameworkElement.Resources>
        <DataTemplate x:Key="myTemplate" DataType="{x:Type local:TabItemContent}">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>
                <Image Grid.Column="0" Source="/Febr20y;component/Image/block.png"/>
                <Border BorderBrush="Black" BorderThickness="0 0 0.2 0"/>
                <StackPanel Grid.Column="1">
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="50"/>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="20"/>
                            <ColumnDefinition Width="*"/>
                        </Grid.ColumnDefinitions>

                        <Label Grid.Column="0" Content="Name: "/>

                        <TextBox Grid.Column="1" Text="{Binding Title, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>

                        <Button Grid.Column="3" Content="Speichern"/>
                    </Grid>
                </StackPanel>
            </Grid>
        </DataTemplate>
    </FrameworkElement.Resources>
    <Grid>
        <TabControl>
            <TabItem ContentTemplate="{StaticResource myTemplate}"
                     Header="{Binding Title}"
                     Content="{Binding}">
                <TabItem.DataContext>
                    <local:TabItemContent Title="TitleTest"/>
                </TabItem.DataContext>
            </TabItem>
            <TabItem Header="Tab 2"/>
            <TabItem Header="Tab 3"/>
        </TabControl>
    </Grid>
</Window>

Работает отлично

MVVM實現示例：

namespace TabItemHeaderBinding
{
    public class TabItemImageContent : TabItemContent
    {
        private object _imageSource;

        public object ImageSource { get => _imageSource; set =>Set(ref _imageSource, value); }
    }
}

using System.Collections.ObjectModel;

namespace TabItemHeaderBinding
{
    public class TabItemContentViewModel
    {
        public ObservableCollection<TabItemImageContent> Tabs { get; }
            = new ObservableCollection<TabItemImageContent>()
            {
                new TabItemImageContent() {Title = "First", ImageSource="/Febr20y;component/Image/block.png"},
                new TabItemImageContent() {Title = "Second", ImageSource="/Febr20y;component/Image/RAnimated1.gif"},
                new TabItemImageContent() {Title = "Third", ImageSource="/Febr20y;component/Image/plus.jpg"},
            };
    }
}

<Window x:Class="TabItemHeaderBinding.ThbMvvmWindow"
        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:TabItemHeaderBinding"
        mc:Ignorable="d"
        Title="ThbMvvmWindow" Height="450" Width="800">
    <FrameworkElement.Resources>
        <DataTemplate x:Key="myTemplate" DataType="{x:Type local:TabItemImageContent}">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"/>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>
                <Image Grid.Column="0" Source="{Binding ImageSource}"/>
                <Border BorderBrush="Black" BorderThickness="0 0 0.2 0"/>
                <StackPanel Grid.Column="1">
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="50"/>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="20"/>
                            <ColumnDefinition Width="*"/>
                        </Grid.ColumnDefinitions>

                        <Label Grid.Column="0" Content="Name: "/>

                        <TextBox Grid.Column="1" Text="{Binding Title, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>

                        <Button Grid.Column="3" Content="Speichern"/>
                    </Grid>
                </StackPanel>
            </Grid>
        </DataTemplate>
    </FrameworkElement.Resources>
    <FrameworkElement.DataContext>
        <local:TabItemContentViewModel/>
    </FrameworkElement.DataContext>
    <Grid>
        <TabControl ItemsSource="{Binding Tabs}"
                    ContentTemplate="{DynamicResource myTemplate}">
            <TabControl.ItemContainerStyle>
                <Style TargetType="TabItem">
                    <Setter Property="Header" Value="{Binding Title}"/>
                </Style>
            </TabControl.ItemContainerStyle>
        </TabControl>
    </Grid>
</Window>