Can you use dot notation with ViewData in Razor Pages?

user_10122964 0
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I'm using Razor Pages and trying to access a property from ViewData:

@{
    ViewData["Property"] = "Value";
}

I know this works:

<h1>@ViewData["Property"]

However, the app crashes when I try to access it with dot notation:

<h1>@ViewData.Property</h1>

Why does this hapen?

I know dot notation works with ViewBag since it allows me to access properties dynamically.

razor-pages dictionary c#
2 Answers

ViewData is object of type ViewDataDictionary which is actually IDictionary<string,object> while ViewBag is dynamic. dynamic allows to use dot notation while dictionary in C# allows to get values only via [key], so your app crashes because there is no such property Property in ViewDataDictionary even if there is such key.

user_56368580

The ViewData is IDictionary which means you can access data using key (ViewData[yourkey]). But your concern is also valid, we want to access property so we can reduce risk of some teammates mis type the key.

And for that reason, I always prefer to use @Model.YourProperty. Then next question, if you got a common used field for all pages such as Languague, LoginName, ... Then I suggest to have a base Model to contain all those properties. And all page model needs to inherit/implement those properties.

user_129663380
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