How can I remove this element from Grid using its name

Question

1.22/5 (3 votes)

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hello friends

this code works

XML

<Grid Name="Layout">
    <TextBlock Name="tbPrueba" Text="Prueba" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="50,20,0,0"/>
    <Button Name="buEliminar" Content="Eliminar" HorizontalAlignment="Left" VerticalAlignment="Top"
            Width="75" Margin="50,56,0,0" Click="buEliminar_Click"/>
</Grid>

C#

private void buEliminar_Click(object sender, RoutedEventArgs e)
{
    UIElement Hijo = Layout.FindName("tbPrueba") as UIElement;
    Layout.Children.Remove(Hijo);
}

but when I add the control from code, this does not work

C#

TextBlock MyTextBlock = new TextBlock()
{
    Name = "tbPrueba",
    Text = "Prueba",
    HorizontalAlignment = HorizontalAlignment.Left,
    VerticalAlignment = VerticalAlignment.Top,
    Margin = new Thickness(50, 20, 0, 0),
};
Layout.Children.Add(MyTextBlock);

...

C#

        private void buEliminar_Click(object sender, RoutedEventArgs e)
        {
// Not work why ?
            UIElement Hijo = Layout.FindName("tbPrueba") as UIElement;
            Layout.Children.Remove(Hijo);
        }

please tell me what's going on

Posted 9-Aug-13 15:07pm

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stibee · Accepted Answer · 2013-08-11T19:14:00

Possibility 1:

C#

private void buEliminar_Click(object sender, RoutedEventArgs e)
{
 UIElement Hijo = (UIElement)LogicalTreeHelper.FindLogicalNode(Layout, "tbPrueba");
 //UIElement Hijo = Layout.FindName("tbPrueba") as UIElement;
 Layout.Children.Remove(Hijo);
}

Details:
http://msdn.microsoft.com/en-us/library/system.windows.logicaltreehelper.findlogicalnode.aspx[^]

Possibility 2:

C#

TextBlock MyTextBlock = new TextBlock()
     {
       Name = "tbPrueba",
       Text = "Prueba",
       HorizontalAlignment = HorizontalAlignment.Left,
       VerticalAlignment = VerticalAlignment.Top,
       Margin = new Thickness(50, 20, 0, 0),
     };
     Layout.Children.Add(MyTextBlock);
     this.RegisterName("tbPrueba", MyTextBlock);

C#

private void buEliminar_Click(object sender, RoutedEventArgs e)
{
 //UIElement Hijo = (UIElement)LogicalTreeHelper.FindLogicalNode(Layout, "tbPrueba");
 UIElement Hijo = Layout.FindName("tbPrueba") as UIElement;
 Layout.Children.Remove(Hijo);
}

There is something written about that:
http://stackoverflow.com/questions/1755377/why-cant-i-access-a-textbox-by-name-with-findname[^]