Getting a Request.Headers value

user_175893 0
Viewed 200748

Very simple I'm sure, but driving me up the wall! There is a component that I use in my web application that identifies itself during a web request by adding the header "XYZComponent=true" - the problem I'm having is, how do you check for this in your view?

The following wont work:

if (Request.Headers["XYZComponent"].Count() > 0)

Nor this:

if (Request.Headers.AllKeys.Where(k => k == "XYZComponent").Count() > 0)

Both throw exceptions if the header variable has not been set. Any help would be most appreciated.

namevaluecollection httpwebrequest http-headers asp.net-mvc c#
7 Answers

In dotnet core, Request.Headers["X-MyCustomHeader"] returns StringValues which will not be null. You can check the count though to make sure it found your header as follows:

var myHeaderValue = Request.Headers["X-MyCustomHeader"];
if(myHeaderValue.Count == 0) return Unauthorized();
string myHeader = myHeaderValue.ToString(); //For illustration purposes.
user_91890310
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