[英]wpf c# change an element in selected tab
我有一個這樣的XAML代碼:
<Grid x:Name="LayoutRoot">
<TabControl Margin="0,53,0,0">
<TabItem Header="First">
<Grid Background="#FFE5E5E5">
<TextBlock />
</Grid>
</TabItem>
<TabItem Header="Second" >
<Grid Background="#FFE5E5E5">
<TextBlock />
</Grid>
</TabItem>
<TabItem Header="Third">
<Grid Background="#FFE5E5E5">
<TextBlock />
</Grid>
</TabItem>
</TabControl>
<Button Content="Button" HorizontalAlignment="Right" Margin="0,8,174,0" VerticalAlignment="Top" Width="75"/>
<TextBox Height="20.96" Margin="30,9,267,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top"/>
</Grid>
如果在文本框中鍵入某些內容,則在每個tabitem中都使用C#,然后單擊按鈕,現在選擇的TabItem為“第三”,請幫助我現在如何更改該Selected TabItem中的文本塊? 是的,文本框和按鈕位於選項卡的外部。
這里是:
<Grid x:Name="LayoutRoot">
<TabControl Margin="0,53,0,0" Name="tabControl">
<TabItem Header="First">
<Grid Background="#FFE5E5E5">
<TextBlock />
</Grid>
</TabItem>
<TabItem Header="Second" >
<Grid Background="#FFE5E5E5">
<TextBlock />
</Grid>
</TabItem>
<TabItem Header="Third">
<Grid Background="#FFE5E5E5">
<TextBlock />
</Grid>
</TabItem>
</TabControl>
<Button Content="Button" HorizontalAlignment="Right" Margin="0,8,174,0" VerticalAlignment="Top" Width="75" Click="Button_Click"/>
<TextBox Height="20.96" Margin="30,9,267,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Name="textBox"/>
</Grid>
備用代碼:
private void Button_Click(object sender, RoutedEventArgs e)
{
var match = tabControl.Items.OfType<TabItem>().Where(tab => tab.Header.ToString() == textBox.Text).FirstOrDefault();
if (match != null) match.IsSelected = true;
}
希望我對你正確
更新看起來我第一次都不了解您。 這是您案例的正確支持代碼:
private void Button_Click(object sender, RoutedEventArgs e)
{
tabControl.Items.OfType<TabItem>().Where(tab => tab.IsSelected == true).First().Header = textBox.Text;
}
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