If I have a route like this:
api/account/{id}/devices
how do I get the id value from actionContext in an action filter?
When the route was api/account/{id} I used
actionContext.Request.RequestUri.Segments.Last()
Is there a reliable way to get any parameter from url string if I know the parameter name, but not where it resides in url?
(ActionContext.ActionArguments are null, btw).
@orsvon nudged me in a somewhat right direction:
What is Routedata.Values[""]?
In web api there is no ViewBag, but the idea is correct.
For anyone stumbling here:
If you have some filter or attribute and you need to get some parameter, you can do it like this:
public class ContractConnectionFilter : System.Web.Http.AuthorizeAttribute
{
private string ParameterName { get; set; }
public ContractConnectionFilter(string parameterName)
{
ParameterName = parameterName;
}
private object GetParameter(HttpActionContext actionContext)
{
try
{
return actionContext.RequestContext.RouteData.Values
//So you could use different case for parameter in method and when searching
.Where(kvp => kvp.Key.Equals(ParameterName, StringComparison.OrdinalIgnoreCase))
.SingleOrDefault()
//Don't forget the value, Values is a dictionary
.Value;
}
catch
{
return null;
}
}
protected override bool IsAuthorized(HttpActionContext actionContext)
{
object parameter = GetParameter(actionContext);
... do smth...
}
}
and use it like this:
[HttpGet, Route("account/{id}/devices/{name}")]
[ContractConnectionFilter(parameterName: "ID")] //stringComparison.IgnereCase will help with that
//Or you can omit parameterName at all, since it's a required parameter
//[ContractConnectionFilter("ID")]
public HttpResponseMessage GetDevices(Guid id, string name) {
... your action...
}