Contains Element? : Panel « Windows Presentation Foundation

  

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

    x:Class="ElemCollMethods.Pane1"

    WindowTitle="UI Element Collection Methods Sample">

 <StackPanel>

    <TextBlock Name="txt" FontSize="16">UI Element Collection - Methods</TextBlock>



    <TabControl>

        <TabItem MouseLeftButtonUp="ContainsElement">

            <TabItem.Header>Contains Element?</TabItem.Header>

        </TabItem>

    </TabControl>

    <StackPanel Name="sp1"></StackPanel>



 </StackPanel>

</Page>

//File:Window.xaml.cs



using System;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Windows.Data;

using System.Windows.Input;



namespace ElemCollMethods

{



  public partial class Pane1 : Page

  {

    System.Windows.Controls.Button btn, btn1, btn2, btn3;



        void ContainsElement(object sender, RoutedEventArgs e)

        {

            sp1.Children.Clear();

            btn = new Button();

      btn.Content = "Click to clear";

            sp1.Children.Add(btn);

            btn.Click += (ClearControls);

      btn1 = new Button();

      btn1.Content = "Click to clear";

            sp1.Children.Add(btn1);

            btn1.Click += (ClearControls);

      btn2 = new Button();

      btn2.Content = "Click to clear";

            sp1.Children.Add(btn2);

            btn2.Click += (ClearControls);

      btn3 = new Button();

      btn3.Content = "Click to clear";

            sp1.Children.Add(btn3);

            btn3.Click += (ClearControls);



            TextBlock txt1 = new TextBlock();

            sp1.Children.Add(txt1);

            txt1.Text = "This StackPanel contains UIElement btn1: " + sp1.Children.Contains(btn1).ToString();

        }

        

    void ClearControls(object sender, RoutedEventArgs e)

    {

            sp1.Children.Clear();

        }        

  }

}
Contains Element? : Panel « Windows Presentation Foundation « C# / C Sharp
