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Modern Work App Consult Blog
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Create a Windows module for React Native with asynchronous code in C#

Matteo Pagani's avatar
Matteo Pagani
Icon for Microsoft rankMicrosoft
Jun 08, 2020
We have already explored on this blog the opportunity to create native Windows modules for React Native. Thanks to these modules, you are able to surface native Windows APIs to JavaScript, so that yo...
Updated Jun 09, 2020
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hamzasari's avatar
hamzasari
Copper Contributor
Apr 21, 2021

Hi Matteo,

 

Very good documentation and your blog posts helped me a lot, thank you very much.

 

But, I have problems about calling a javascript method from C# code, for example I catch keydown event on Window.Current.CoreWindow.KeyDown and try to send string value of the pressed key to js side using parameter args.VirtualKey.ToString().

When I call the CallJSFunction from ReactContext, react context is always null and I can't call js function.

 

This approach works in debug mode in visual studio 2019, I can send the pressed key as string from c# and get it at js side.

But when in release mode, react context is always null.

Should I run metro bundler when getting a release build too? Metro Bundler seems like working when getting release build in output window in Visual Studio.

 

Can you please help me about this issue?

 

Thank you,

Hamza