在aspx视图引擎中使用Viewbag的语法？

Question

I know ViewBag is used in Razor view engine but not sure how to access viewBag's dynamic properties in aspx view engine.

As I want to put text inside Html.ValidationSummary() through Viewbag I am using the following syntax but getting error "has no applicable method named 'ValidationSummary' but appears to have an extension method by that name. Extension methods cannot be dynamically dispatched. Consider casting the dynamic arguments or calling the extension method without the extension method syntax."

Syntex:

<%= Html.ValidationSummary(ViewBag.ValidationSummary)%>

Answer 1

It is complaining because ValidationSummary has no single parameter overload that takes a parameter of type dynamic ; that is what ViewBag properties are. Cast the property to a string.

<%= Html.ValidationSummary((string)ViewBag.ValidationSummary)%>