Question

I added reference to the System.Web.DataVisualization to my MVC project.
Now when I try to add the namespace to my web.config I am getting error

CS0234: The type or namespace name ‘DataVisualization’ does not exist in the namespace ‘System.Web.UI’ (are you missing an assembly reference?)

So then I try to use the same in my controller. This works perfectly.

using System.Web.UI.DataVisualization;

Then the same should work in my Razor view

So I try to use this in my Razor view

@using System.Web.UI.DataVisualization;

This again not not work giving me the same error

How come I can use the namespace in my controller and not in my views?

Am I missing something…

Answer 1

If you go to the project references, go to properties on “System.Web.DataVisualization,” then set “CopyLocal” to true, you’ll then be able to put

@using System.Web.UI.DataVisualization

in your Razor view.