根据所选选项卡设置按钮的可见性 [英] Set Visibility of Button depending from selected Tab

问题描述

我有一个Button和一个带有某些选项卡的TabControl。如果选择了第二个选项卡，我想隐藏该按钮。这是我的方法，但是如果单击第二个选项卡，该按钮不会消失。

I have a Button and a TabControl with some Tabs. I want to hide the button, if the second tab is selected. This is my approach, but the button does not disappear if I click on the second tab. What could be wrong?

<Button Content="New" x:Name="NewButton">

    <Button.Style>
        <Style TargetType="Button">
            <Style.Triggers>

                <DataTrigger Binding="{Binding TabMainControl.SelectedIndex}" Value="1">
                    <Setter Property="Visibility" Value="Hidden" />
                </DataTrigger>

            </Style.Triggers>
        </Style>
    </Button.Style>

</Button>



<TabControl TabStripPlacement="Top"  x:Name="TabMainControl">

    <TabItem Header="Name" x:Name="NameTab">...</TabItem>

    <TabItem Header="Code" x:Name="CodeTab">...</TabItem>

    <TabItem Header="Maleware" x:Name="MalewareTab">...</TabItem>

    <TabItem Header="Custom" x:Name="CustomTab">...</TabItem>

</TabControl>

推荐答案

因为要绑定到另一个元素的属性在您的应用程序中，您应该使用 Binding.ElementName属性 和路径像这样：

Because you want to bind to the property of another element in your application you should use Binding.ElementName Property and Path like this:

<DataTrigger Binding="{Binding  ElementName=TabMainControl, Path=SelectedIndex}" Value="1">
    <Setter Property="Visibility" Value="Hidden" />
</DataTrigger>

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