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/// <summary>
/// Add UrlHelper extension methods that construct outgoing URL's but
/// remove route values that are excluded by the Bind attribute's
/// Include or Exclude. The methods to mirror are those that take an
/// object as an argument:
///
/// public string Action(string actionName, object routeValues);
/// public string Action(string actionName, string controllerName
/// , object routeValues);
/// public string Action(string actionName, string controllerName
/// , object routeValues, string protocol);
///
/// public string RouteUrl(object routeValues);
/// public string RouteUrl(string routeName, object routeValues);
/// public string RouteUrl(string routeName, object routeValues
/// , string protocol);
/// </summary>
public static class UrlHelperExtensions
{
public static string Action(this UrlHelper helper, string actionName
, object routeValues, bool onlyBoundValues)
{
RouteValueDictionary finalRouteValues =
new RouteValueDictionary(routeValues);
if (onlyBoundValues)
{
RemoveUnboundValues(finalRouteValues, routeValues);
}
// Internally, MVC calls an overload of GenerateUrl with
// hard-coded defaults. Since we shouldn't know what these
// defaults are, we call the non-extension equivalents.
return helper.Action(actionName, routeValues);
}
public static string Action(this UrlHelper helper, string actionName
, string controllerName, object routeValues
, bool onlyBoundValues)
{
RouteValueDictionary finalRouteValues =
new RouteValueDictionary(routeValues);
if (onlyBoundValues)
{
RemoveUnboundValues(finalRouteValues, routeValues);
}
return helper.Action(actionName, controllerName, finalRouteValues);
}
public static string Action(this UrlHelper helper, string actionName
, string controllerName, object routeValues
, string protocol, bool onlyBoundValues)
{
RouteValueDictionary finalRouteValues =
new RouteValueDictionary(routeValues);
if (onlyBoundValues)
{
RemoveUnboundValues(finalRouteValues, routeValues);
}
return helper.Action(actionName, controllerName
, finalRouteValues, protocol);
}
public static string RouteUrl(this UrlHelper helper, object routeValues
, bool onlyBoundValues)
{
RouteValueDictionary finalRouteValues =
new RouteValueDictionary(routeValues);
if (onlyBoundValues)
{
RemoveUnboundValues(finalRouteValues, routeValues);
}
return helper.RouteUrl(finalRouteValues);
}
public static string RouteUrl(this UrlHelper helper, string routeName
, object routeValues, bool onlyBoundValues)
{
RouteValueDictionary finalRouteValues =
new RouteValueDictionary(routeValues);
if (onlyBoundValues)
{
RemoveUnboundValues(finalRouteValues, routeValues);
}
return helper.RouteUrl(routeName, finalRouteValues);
}
public static string RouteUrl(this UrlHelper helper, string routeName
, object routeValues, string protocol
, bool onlyBoundValues)
{
RouteValueDictionary finalRouteValues =
new RouteValueDictionary(routeValues);
if (onlyBoundValues)
{
RemoveUnboundValues(finalRouteValues, routeValues);
}
return helper.RouteUrl(routeName, finalRouteValues, protocol);
}
/// <summary>
/// Reflect into the routeValueObject and remove any keys from
/// routeValues that are not bound by the Bind attribute
/// </summary>
private static void RemoveUnboundValues(RouteValueDictionary routeValues
, object source)
{
if (source == null)
{
return;
}
var type = source.GetType();
BindAttribute b = null;
foreach (var attribute in type.GetCustomAttributes(true))
{
if (attribute is BindAttribute)
{
b = (BindAttribute)attribute;
break;
}
}
if (b == null)
{
return;
}
foreach (var property in type.GetProperties())
{
var propertyName = property.Name;
if (!b.IsPropertyAllowed(propertyName))
{
routeValues.Remove(propertyName);
}
}
}
}