Hi i am creating sample Winui3 packaged application in c# i need textblock fontsize dynamically calculate with screen resulation please suggest me. the below piece of code working fine for WPF but not Winui3 is there any alternative to this? private void Window_Loaded(object sender, RoutedEventArgs e) { double controlsize = ((SystemParameters.PrimaryScreenWidth / 12) / 3 * 2) / 5 * 0.7; System.Windows.Application.Current.Resources.Remove("ControlFontSize"); System.Windows.Application.Current.Resources.Add("ControlFontSize", controlsize); } Step3 : In the Xaml page use FontSize="{DynamicResource ControlFontSize}" for the control like: <TextBlock Text="Button" HorizontalAlignment="Left" FontSize="{DynamicResource ControlFontSize}" Margin="239,163,0,0" VerticalAlignment="Top" Width="75"/>

There is no DynamicResource in WinUI You can just change the font size by code by naming the TextBlock <TextBlock x:Name="TextBlock1" then TextBlock1.FontSize = controlsize;

How to Scale textblock fontsize in Winui3 application according to screen resolution?

Accepted answer

Castorix31 83,206 Reputation points

2022-03-09T07:59:34.213+00:00

There is no DynamicResource in WinUI

You can just change the font size by code by naming the TextBlock

<TextBlock x:Name="TextBlock1"

then

TextBlock1.FontSize = controlsize;
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Sachi 221 Reputation points

2022-03-09T09:23:39.72+00:00

what this controlsize will do ?

if u refer my code means that code not working in Winui3 i am getting error for "SystemParameters.PrimaryScreenWidth" is does not exist

Because There is NO Height and width property for Window in Winui3 can u please suggest me as per my code what i can use in place of "SystemParameters.PrimaryScreenWidth" in winui3

Castorix31 83,206 Reputation points

2022-03-09T10:02:26.753+00:00

what this controlsize will do ?

I copied it from you code...

what i can use in place of "SystemParameters.PrimaryScreenWidth"

Read the doc :
Maps to SM_CXSCREEN. See GetSystemMetrics.

Then just call GetSystemMetrics with SM_CXSCREEN...

Sachi 221 Reputation points

2022-03-09T11:12:58.337+00:00

double controlsize;
controlsize = ((((int)SystemMetric.SM_CXSCREEN )/ 12) / 3 * 2) / 5 * 0.7;
i am using like this but getting 0 value for control is this correct or i need to modify something?
please suggest me ur code.

Castorix31 83,206 Reputation points

2022-03-09T11:35:53.903+00:00

If I copy your formula, I get controlsize = 14.7 :

int nScreenWidth = GetSystemMetrics(SM_CXSCREEN); double controlsize = (((nScreenWidth) / 12) / 3 * 2) / 5 * 0.7;

with :

[DllImport("User32.dll", CharSet = CharSet.Auto, SetLastError = true)] public static extern int GetSystemMetrics(int nIndex); public const int SM_CXSCREEN = 0; public const int SM_CYSCREEN = 1;

Sachi 221 Reputation points

2022-03-09T13:46:15.627+00:00

Hi one more help how to make controls (Textblock) Focusable in winui3 because in WPF we can get property Focusable but its not there in Winui3 how can i get it focus

Castorix31 83,206 Reputation points

2022-03-09T14:51:16.887+00:00

You can set

TextBlock1.IsTabStop = true;

But as there is no caret in TextBlock like in TextBox, it will only be visible if a text is selected

Sachi 221 Reputation points

2022-03-10T04:27:35.74+00:00

Thank you so much its working and how to apply color to winui3 window the background and foreground property is not there so

laurentcutey-3677 16 Reputation points

2022-03-10T08:30:10.907+00:00

Don't ask several different questions in the same thread (it will become unreadable for users to find the answer)
Mark the answer as right answer and ask a different question in a new thread
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How to Scale textblock fontsize in Winui3 application according to screen resolution?

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