c++ winrt uwp how to get value out of dependency property

To get the value of a dependency property in C++/WinRT for UWP, you can use the GetValue method provided by the DependencyObject class. Here's an example:

cppCopy code
#include <winrt/Windows.UI.Xaml.h>

#include <winrt/Windows.UI.Xaml.Controls.h>

#include <iostream>



int main()

{

    winrt::init_apartment();



    // Create an instance of a XAML control

    winrt::Windows::UI::Xaml::Controls::Button button;



    // Set a value to a dependency property

    winrt::Windows::UI::Xaml::Controls::Button::ContentProperty().SetValue(button, L"Hello, World!");



    // Get the value of the dependency property

    winrt::hstring content = winrt::Windows::UI::Xaml::Controls::Button::ContentProperty().GetValue(button).as<winrt::hstring>();



    // Print the value

    std::wcout << L"Button content: " << content.c_str() << std::endl;



    return 0;

}

In this example, a Button control is created, and its Content property is set to "Hello, World!" using the SetValue method. Then, the value of the Content property is retrieved using the GetValue method, and it is converted to a winrt::hstring. Finally, the value is printed to the console.

Note that you need to include the appropriate headers for the WinRT types you are using (Windows.UI.Xaml and Windows.UI.Xaml.Controls in this case). Also, make sure to initialize the WinRT runtime with winrt::init_apartment() before using any WinRT functionality.