UserControl element inaccessible due to its protection level

Question

I am writing a Windows Phone 8.1 App (WinRT).

my user control: XAML:

<UserControl x:Name="LoadingProgressBarPage"
x:Class="Project1.Custom.General.UserControls.LoadingOverlayFullScreen"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Merakyahoga.com.Custom.General.UserControls"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
 mc:Ignorable="d"
FontFamily="{StaticResource PhoneFontFamilyNormal}"

Foreground="{x:Null}"
d:DesignHeight="800" d:DesignWidth="480" >

<Grid x:Name="LayoutRoot">
    <Grid.RowDefinitions>
        <RowDefinition Height="1*"/>
        <RowDefinition Height="1*"/>
        <RowDefinition Height="1*"/>
    </Grid.RowDefinitions>
    <StackPanel 
        Name="LayoutRoot_StackPanelMain"
        Grid.Row="1"
                Orientation="Vertical">
        <ProgressBar Name="ProgressBar" 
                     IsIndeterminate="True"
                     Foreground="{StaticResource DefaultTheme_DarkBlueColor}" 

                     Height="50" 
                     Width="480" 
                     VerticalAlignment="Center"/>

        <StackPanel Name="LayoutRoot_SubStackPanel"
                    Orientation="Horizontal"
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center">

            <Image Name="ImageHolder_Main"
                   Width="54">    
            </Image>

            <TextBlock Name="ProgressBarText"
                   Text="Please Wait.." 
                       Margin="10,0,0,0"
                   FontWeight="Normal"
                   HorizontalAlignment="Center"
                       FontSize="18"
                       Foreground="{StaticResource DefaultTheme_DarkBlueColor}" VerticalAlignment="Center"/>

        </StackPanel>

    </StackPanel>
</Grid>

cs:

namespace Project1.Custom.General.UserControls
{
    public partial class LoadingOverlayFullScreen : UserControl
    {


        public LoadingOverlayFullScreen()      
        {
            InitializeComponent()

            //WINRT:
            this.LayoutRoot.Height = Window.Current.Bounds.Height;
            this.LayoutRoot.Width = Window.Current.Bounds.Width;

        }

    }

}

In my mainpage.cs:

LoadingOverlayFullScreen LoadingOverlayFullScreenObject = new LoadingOverlayFullScreen();
        //test:
LoadingOverlayFullScreenObject.ProgressBarText = "Hello"; //ERROR Here >> **element inaccessible due to its protection level**

Answer 1

By naming the TextBlock element, you cause the XAML compiler to generate a class member having that name, i.e. ProgressBarText. But the accessibility for that member is not public, but rather internal.

If you really want for the field to be public, you can add the x:FieldModifier attribute:

<TextBlock Name="ProgressBarText"
           x:FieldModifier="public"
           Text="Please Wait.." 
           Margin="10,0,0,0"
           FontWeight="Normal"
           HorizontalAlignment="Center"
           FontSize="18"
           Foreground="{StaticResource DefaultTheme_DarkBlueColor}"
           VerticalAlignment="Center"/>

That said, it would be better to expose the Text property of the TextBlock object as a string property in your code-behind. Or even better, use data-binding to control the Text value of the TextBlock (but your code example is not complete enough for me to say how exactly you would do that).