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How to Access a Control on MainPage from a different user control named Page1

I have two pages in a Silverlight 4 application: MainPage and Page1. On MaingPage I have a RichTextBox1 within a Grid named myGrid. I would like to access this RichTextBox1 from the ClickEvent of a Button1 on Page1 (that from a page different than the one on which RichTextBox1 lies in a Grid).
I would be grateful for advice on how to achieve this.

saragani

Can you post your XAML of both pages?

FaheemAhmadGul

ASKER

Thank you for your comment.
There are actually 3 pages in this simple test application. I am including the code behind files for the the three pages in the code window. I would like to be able to type something such as "Happy" programmatically (by clicking Button1 on Page1 into the RichTextBox on MainPage. However at present I am unable to access RichTextBox which lies inside a Grid on MainPage from Page1.
The XAML for all three of them is as follows:

MainPage.xaml

UserControl x:Class="QuickNavigationC.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400" Loaded="UserControl_Loaded">

<Grid x:Name="LayoutRoot" Background="White" >

<Border Height="312" Width="412" BorderBrush="Gray" BorderThickness="3" >

</Border>

<Grid Name="ParentGrid" Height="300" Width="400" Background="#FFF2D7B7">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />

</Grid.RowDefinitions>

<Grid Grid.Row="0" Margin="0,0,0,0" Height="150" Width="400" Background="#FF009600">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>

<Button Grid.Row="0" Grid.Column="0" Name="cmdPage1" Click="cmdPage1_Click" Content="Go To Page 1"></Button>
<Button Grid.Row="1" Grid.Column="0" Name="cmdPage2" Click="cmdPage2_Click" Content="Go to Page 2"></Button>
<Button Grid.Row="2" Grid.Column="0" Name="cmdPage3" Content="Stay put"></Button>

<RichTextBox Grid.Column="1" Grid.ColumnSpan="2" Grid.RowSpan="3" Name="txtNotes"></RichTextBox>
</Grid>

<Grid Grid.Row="1" Margin="0,0,0,0" Height="150" Width="400" Name="gridPlaceHolder">
<Button Content="New Controls Will Load Here"></Button>
</Grid>

</Grid>
</Grid>
</UserControl>

Page1.xaml

<UserControl x:Class="QuickNavigationC.Page1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">

<Grid x:Name="LayoutRoot" Background="White">
<Button Name="Button1" Margin="0" Content="Clicking me shoud type"Happy" into the Box Above" Click="Button1_Click"></Button>
</Grid>
</UserControl>

Page2.xaml

<UserControl x:Class="QuickNavigationC.Page2"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">

<Grid x:Name="LayoutRoot" Background="White">
<Button Name="cmdHappy" Content="I am Page 2"></Button>
</Grid>
</UserControl>

//MainPage.xaml.cs

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;

namespace QuickNavigationC
{
    public partial class MainPage : UserControl
    {

       
        public MainPage()
        {
            InitializeComponent();
        }

        private void cmdPage1_Click(object sender, RoutedEventArgs e)
        {

            txtNotes.Selection.Text = "You have clicked go to Page 1. ";
            Page1 newPage = new Page1();
            gridPlaceHolder.Children.Clear();       
            gridPlaceHolder.Children.Add(newPage);
           


        }

        private void cmdPage2_Click(object sender, RoutedEventArgs e)
        {
            txtNotes.Selection.Text = "You have clicked go to Page 2. ";
            Page2 newPage = new Page2();
            gridPlaceHolder.Children.Clear();
            gridPlaceHolder.Children.Add(newPage); 

        }

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {

        }
    }
}



//Page1.xaml.cs

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;

namespace QuickNavigationC
{
    public partial class Page1 : UserControl
    {
       
        public Page1()
        {
            InitializeComponent();
        }

       


    }
}


//Page1.xaml.cs

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;

namespace QuickNavigationC
{
    public partial class Page2 : UserControl
    {
        public Page2()
        {
            InitializeComponent();
        }
    }
}

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saragani

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FaheemAhmadGul

ASKER

Brilliant. This worked perfectly. I am extremely grateful. This has solved my problem. I would be very keen to understand and learn the alternative approach you have suggested also. I will post this question as a new related question and would be grateful if you could explain the alternative approach also if at all possible. Thanks.

saragani

Ok.

Glad to help :-)