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Asked: 2026-05-15T17:13:53+00:00

In WPF-XAML, determining DataContext at designtime vs runtime. Why do we have to add

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In WPF-XAML, determining DataContext at designtime vs runtime.

Why do we have to add “d:DataContext” while we already have set the “DataContext” ?
Why Microsoft introduced DesignTime attributes (code that we have to add, a little bit complex) when it could already be determined automatically by itself using “DataContext” attribute. The only utility that I could see is for a DataContext set in code at RunTime. Otherwise Microsoft could use the DataContext and find the “Shape” of the data like it does with d:DataContext.

What I don’t understand properly ? What I’m missing ?

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1 Answer

  1. Editorial Team

    As yo noted yourself:
    In many projects/approaches the DataContext will be set dynamically at runtime.
    So you couldn’t know anything about the DataContext at designtime..

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