WPF Tabcontrol绑定

问题描述

有我的密码

     <TabControl x:Name="TabControlSQL" Margin="10,10,10" Grid.Row="2" SelectionChanged="TabControlSQL_SelectionChanged" ItemsSource="{Binding}">
            <TabControl.Resources>
                <DataTemplate x:Key="TabHeader" DataType="TabItem">
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition></ColumnDefinition>
                            <ColumnDefinition></ColumnDefinition>
                            <ColumnDefinition></ColumnDefinition>
                            <ColumnDefinition></ColumnDefinition>
                            <ColumnDefinition></ColumnDefinition>
                            <ColumnDefinition></ColumnDefinition>
                            <ColumnDefinition></ColumnDefinition>
                            <ColumnDefinition></ColumnDefinition>
                        </Grid.ColumnDefinitions>
                        <TextBlock Text="{Binding SourceImageTab}" FontSize="20" Foreground="Red"></TextBlock>//binding not work
                        <TextBlock Grid.Column="0" Text="[" />
                        <TextBlock Grid.Column="1" Text="{Binding RelativeSource={RelativeSource AncestorType=TabItem },Path=Header}" />
                        <TextBlock Grid.Column="2" Text="]" />
                        <Button Background="Transparent" BorderBrush="Transparent" Grid.Column="2" Height="15" Width="15" Padding="0" Name="btnUnLock" Click="btnUnLock_Click" Margin="10,0">
                            <Image HorizontalAlignment="Center" VerticalAlignment="Center" Source="{Binding SourceImageTab}" Height="12" ></Image>//binding not work
                        </Button>
                        <Button Background="Transparent" BorderBrush="Transparent" Grid.Column="3" Height="15" Width="15" Name="btnDelete" Padding="0"  Margin="3,0" Click="btnDelete_Click" CommandParameter="{Binding RelativeSource={RelativeSource AncestorType={x:Type TabItem}},Path=Name}">
                            <Image HorizontalAlignment="Center" VerticalAlignment="Center" Source="..//Resources/cancel.png" Height="12" ></Image>
                        </Button>
                    </Grid>
                </DataTemplate>
            </TabControl.Resources>
        </TabControl>
        <TextBlock Text="{Binding SourceImageTab}" FontSize="20" Foreground="Red"></TextBlock>//this work

为什么只有一个绑定有效？第一和第二个不，为什么？也许问题是tabcontrol绑定？我还添加了Window.Inizialized {DataContext = this}，谢谢

这是财产

public string SourceImageTab
    {
        get
        {
            return "..//Resources/locked.png";
        }
    }

解决方法

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