asp.net core - How to pass variable from controller to filter

Question

I have a controller. On the controller's post method, there is a variable (an object variable) I want to pass to my action filter: the method:

public void OnActionExecuted(ActionExecutedContext context)...

Any suggestions on how achieve this?

If i understand your question, you are trying to access action method's parameter in action filter. Can you try to access it from context's route values? — LP13
– LP13, Commented Nov 17, 2018 at 3:41

Gabriel Luci · Accepted Answer · 2018-11-17 04:18:37Z

5

Use HttpContext.Items. It's a key / value collection that exists for the duration of a single request.

In your controller, add something:

HttpContext.Items["Something"] = "something I need later";

Then in the OnActionExecuted method pull it out:

var something = context.HttpContext.Items["Something"] as string;

Everything you pull out will be of type object so make sure you cast it to what it was.

answered Nov 17, 2018 at 4:18

Gabriel Luci

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