<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="WpfApplication1.IndexOfSample"
WindowTitle="UIElementCollection IndexOf Sample">
<DockPanel Name="ParentElement">
<TextBlock DockPanel.Dock="Top" Name="TxtDisplay"></TextBlock>
<Button DockPanel.Dock="Top" Click="FindIndex">What is the Index Number
of the Element Just Added?</Button>
<DockPanel Name="MainDisplayPanel">
<TextBlock DockPanel.Dock="Top">Text 1</TextBlock>
<TextBlock DockPanel.Dock="Top">Text 2</TextBlock>
</DockPanel>
</DockPanel>
</Page>
//File:Window.xaml.cs
namespace WpfApplication1 {
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
public partial class IndexOfSample {
void FindIndex(object sender, RoutedEventArgs e)
{
TextBlock newText = new TextBlock();
MainDisplayPanel.Children.Add(newText);
newText.Text = "New element #" ;
DockPanel.SetDock(newText,Dock.Top);
TxtDisplay.Text = MainDisplayPanel.Children.IndexOf(newText)+"";
}
}
}
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