how to add new button by to grid by click on another button?

how to add new button by to grid by click on another button?

I am learning C# Silverlight. I need to add to learn how to add to grid new button after clicking to another button. Here is my code:

using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using System.ComponentModel; using System.Runtime.InteropServices;   namespace SilverlightApplication1 {     public partial class MainPage : UserControl     {          public MainPage()         {             InitializeComponent();              Button btn = new Button();             btn.Width = 100;             btn.Height = 25;              btn.Content = "mytext";              rootCanvas.Children.Add(btn);              btn.MouseLeftButtonDown += new MouseButtonEventHandler(btn_MouseLeftButtonDown);           }          void btn_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)         {             Button btn1 = new Button();              btn1.Width = 100;             btn1.Height = 35;              rootCanvas.Children.Add(btn1);          }          }      } 

The problem that btn1 do not appear on the GRID.

And second question. If I will declare the btn1 in another class, how I should call it from function in this class?

I tried next code, it's look like left mouse event do not work. And I can't understand why.

using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using System.ComponentModel; using System.Runtime.InteropServices;   namespace SilverlightApplication1 {     public partial class MainPage : UserControl     {         Button btn1 = new Button();         Button btn2 = new Button();          public MainPage()         {             InitializeComponent();              btn1.Content = "hello";             btn1.Height = 30;             btn1.Width = 70;             btn1.MouseLeftButtonDown += new MouseButtonEventHandler(btn1_MouseLeftButtonDown);             btn1.MouseEnter += new MouseEventHandler(btn1_MouseEnter);             btn1.MouseRightButtonDown += new MouseButtonEventHandler(btn1_MouseRightButtonDown);             btn1.MouseLeftButtonUp += new MouseButtonEventHandler(btn1_MouseLeftButtonUp);              rootCanvas.Children.Add(btn1);           }          void btn1_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)         {             MessageBox.Show("Left Btn UP");         }          void btn1_MouseRightButtonDown(object sender, MouseButtonEventArgs e)         {             MessageBox.Show("Right Button Down");         }          void btn1_MouseEnter(object sender, MouseEventArgs e)         {          }          void btn1_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)         {             MessageBox.Show("Left Btn Down");         }      }        } 

XAML:

<UserControl x:Class="SilverlightApplication1.MainPage"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"      xmlns:toolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Toolkit"                  xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"     x:Name="test"      Width="1220" Height="960" >      <Grid x:Name="rootCanvas"   Width="640"   Height="480"   Background="Gray">      </Grid> </UserControl> 

Answers & Comments...

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