PDFsharp & MigraDoc Foundation

PDFsharp - A .NET library for processing PDF & MigraDoc Foundation - Creating documents on the fly
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PostPosted: Sun May 07, 2023 8:35 am 
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Joined: Fri May 05, 2023 2:19 pm
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When using MigraDoc in a background job server (I use Hangfire), we have situations where setting the GlobalFontSettings.FontResolver property can occur several times leading to an exception. Even when using a mutex the setting code can still run. If the GlobalFontSettings is implemented as an instance class which is passed to the document renderer the problem will disappear.
In .NET Core and up it would in any case be better to refactor the code to be able to use the DI container via a IServiceProvider instance.


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PostPosted: Mon May 08, 2023 8:37 am 
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Arolla wrote:
When using MigraDoc in a background job server (I use Hangfire), we have situations where setting the GlobalFontSettings.FontResolver property can occur several times leading to an exception.
There is no exception when you set the same FontResolver multiple times. Make sure the FontResolver is a singleton and a mutex is used to create that singleton. Been there, done that.

As of now, it is by design that there is a single, global font resolver.

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Thomas
(Freelance Software Developer with several years of MigraDoc/PDFsharp experience)


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