void BuildOrderedSetOfKeysForRouteValues(ActionDescriptorCollection actions)
{
Contract.Requires(actions != null);
for (var i = 0; i < actions.Items.Count; i++)
{
var action = actions.Items[i];
if (action.AttributeRouteInfo != null)
{
continue;
}
var routeValues = new string[RouteKeys.Length];
for (var j = 0; j < RouteKeys.Length; j++)
{
action.RouteValues.TryGetValue(RouteKeys[j], out routeValues[j]);
}
if (!OrdinalIgnoreCaseEntries.TryGetValue(routeValues, out var entries))
{
entries = new List <ActionDescriptor>();
OrdinalIgnoreCaseEntries.Add(routeValues, entries);
}
entries.Add(action);
if (!OrdinalEntries.ContainsKey(routeValues))
{
OrdinalEntries.Add(routeValues, entries);
}
}
}
public IReadOnlyList <TItem> Select(RouteValueDictionary values)
{
// Select works based on a string[] of the route values in a pre-calculated order. This code extracts
// those values in the correct order.
var routeKeys = RouteKeys;
var routeValues = new string[routeKeys.Length];
for (var i = 0; i < routeKeys.Length; i++)
{
values.TryGetValue(routeKeys[i], out var value);
routeValues[i] = value as string ?? Convert.ToString(value, CultureInfo.InvariantCulture) ?? string.Empty;
}
// Now look up, first case-sensitive, then case-insensitive.
if (OrdinalEntries.TryGetValue(routeValues, out var matches) ||
OrdinalIgnoreCaseEntries.TryGetValue(routeValues, out matches))
{
Debug.Assert(matches != null);
Debug.Assert(matches.Count >= 0);
return(matches);
}
return(Array.Empty <TItem>());
}
