Hey all I am new at WPF so here is my question: How can I change the text in a TextBlock from my mainWindow when the textBlock is in the window named curTemp.xaml? curTemp.xaml code: public partial class curTemp : UserControl { public string _valTempChange { get { return middleForcastCurrentTemp.Text; } set { middleForcastCurrentTemp.Text = value; } } public curTemp() { InitializeComponent(); } } Xaml of the above UserControl: Grid > TextBlock TextWrapping = "Wrap" Padding = "5" Foreground = "White" Panel.ZIndex = "7" HorizontalAlignment = "Left" VerticalAlignment = "Top" Margin = "15,-110,-43,0" Width = "198" Height = "122" > TextBlock.Effect > DropShadowEffect BlurRadius = "4" Direction = "0" ShadowDepth = "0" /> TextBlock.Effect > outlineText:OutlinedTextBlock Height = "146" Width = "192" TextOptions.TextRenderingMode = "Aliased" FontFamily = "Segoe UI" FontSize = "100" x:FieldModifier = "public" x:Name = "middleForcastCurrentTemp" FontWeight = "Medium" TextWrapping = "Wrap" TextAlignment = "Right" Stroke = "Black" StrokeThickness = "3" Fill = "White" Text = "10" /> TextBlock > Grid > And in my MainWindow code: public MainWindow() { InitializeComponent(); curTemp _curTempWindow = new curTemp(); _curTempWindow._valTempChange = "55" ; } When I run that code it never shows "55" in the textBlock. It only shows my default text "10". What am I doing incorrect here?

As you are using a user control, I think you are adding this after main window loaded. Change the value after loading the usercontrol or at form load event.

i set up a button and once everything is loaded i clicked on it and still it did not change.

Answers

WPF change UserControl textblock from another window

David G

1.7k

Hey all I am new at WPF so here is my question:

How can I change the text in a TextBlock from my mainWindow when the textBlock is in the window named curTemp.xaml?

curTemp.xaml code:

public partial class curTemp : UserControl
{
public string _valTempChange
{
get { return middleForcastCurrentTemp.Text; }
set { middleForcastCurrentTemp.Text = value; }
}
public curTemp()
{
InitializeComponent();
}
}

Xaml of the above UserControl:

<Grid>
<TextBlock TextWrapping="Wrap" Padding="5" Foreground="White" Panel.ZIndex="7" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="15,-110,-43,0" Width="198" Height="122">
<TextBlock.Effect>
<DropShadowEffect BlurRadius="4" Direction="0" ShadowDepth="0" />
</TextBlock.Effect>
<outlineText:OutlinedTextBlock Height="146" Width="192" TextOptions.TextRenderingMode="Aliased" FontFamily="Segoe UI" FontSize="100" x:FieldModifier="public" x:Name="middleForcastCurrentTemp"
FontWeight="Medium" TextWrapping="Wrap" TextAlignment="Right" Stroke="Black" StrokeThickness="3" Fill="White" Text="10"/>
</TextBlock>
</Grid>

And in my MainWindow code:


public MainWindow()  
        {  
            InitializeComponent();  
  
            curTemp _curTempWindow = new curTemp();  
  
            _curTempWindow._valTempChange = "55";  
  
        }