OptionalRouteConstraint Class  
Definition
Important
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Defines a constraint on an optional parameter. If the parameter is present, then it is constrained by InnerConstraint.
public ref class OptionalRouteConstraint : Microsoft::AspNetCore::Routing::IRouteConstraint
	public class OptionalRouteConstraint : Microsoft.AspNetCore.Routing.IRouteConstraint
	type OptionalRouteConstraint = class
    interface IRouteConstraint
	type OptionalRouteConstraint = class
    interface IRouteConstraint
    interface IParameterPolicy
	type OptionalRouteConstraint = class
    interface IParameterPolicy
    interface IRouteConstraint
	Public Class OptionalRouteConstraint
Implements IRouteConstraint
		- Inheritance
 - 
				OptionalRouteConstraint
 
- Implements
 
Constructors
| OptionalRouteConstraint(IRouteConstraint) | 
		 Creates a new OptionalRouteConstraint instance given the   | 
        	
Properties
| InnerConstraint | 
		 Gets the IRouteConstraint associated with the optional parameter.  | 
        	
Methods
| Match(HttpContext, IRouter, String, RouteValueDictionary, RouteDirection) | 
		 Determines whether the URL parameter contains a valid value for this constraint.  |