/// <summary>
/// Builds the query string based on the extra route values which were passed explicitly but not used in URL construction.
/// </summary>
/// <param name="valuesMediator">The route values mediator used for URL construction.</param>
/// <param name="values">The current route values.</param>
/// <returns>Returns the query string or <c>null</c> when it cannot be built.</returns>
protected virtual string BuildQueryString(RouteValuesMediator valuesMediator, RouteValueDictionary values)
{
var queryString = new List <KeyValuePair <string, object> >();
foreach (var entry in values)
{
if (systemRouteValueKeys.Contains(entry.Key) ||
valuesMediator.VisitedKeys.Contains(entry.Key) ||
valuesMediator.InvalidatedKeys.Contains(entry.Key) ||
entry.Value == null ||
OutgoingDefaults.HasValue(entry.Key, entry.Value) ||
IncomingDefaults.HasValue(entry.Key, entry.Value))
{
continue;
}
queryString.Add(entry);
}
if (queryString.Count == 0)
{
return(null);
}
var pairs = queryString.Select(e => HttpUtility.UrlEncode(e.Key) + "=" + HttpUtility.UrlEncode(e.Value.ToString()));
return(string.Join("&", pairs));
}
/// <summary>
/// Constructs the URL for the specified <paramref name="path"/> using the <paramref name="valuesMediator"/>.
/// </summary>
/// <param name="path">The path segments tree.</param>
/// <param name="valuesMediator">The route values mediator.</param>
/// <returns>Returns the constructed URL or <c>null</c> if the URL cannot be constructed.</returns>
protected virtual string ConstructUrl(FullPathSegment path, RouteValuesMediator valuesMediator)
{
return((string)path.GetUrlPart((s) => valuesMediator.ResolveValue(s)));
}
/// <summary>
/// Extracts the route values for the specified <paramref name="path"/> from the <paramref name="match"/>.
/// </summary>
/// <param name="path">The path segments tree.</param>
/// <param name="match">The successful match result to extract values from.</param>
/// <param name="valuesMediator">The route values mediator.</param>
protected virtual void ExtractRouteValues(FullPathSegment path, Match match, RouteValuesMediator valuesMediator)
{
path.ExtractRouteValues(match, valuesMediator.SetValue);
}
