private bool TryBindFromUri(HttpControllerContext controllerContext, ParameterSwapInfo found, out HttpActionDescriptor method)
{
var requestParam = HttpUtility.ParseQueryString(controllerContext.Request.RequestUri.Query).Get(found.ParamName);
requestParam = (requestParam == null) ? null : requestParam.Trim();
var paramTypes = found.SupportedTypes;
if (requestParam == string.Empty && paramTypes.Length > 0)
{
//if it's empty then in theory we can select any of the actions since they'll all need to deal with empty or null parameters
//so we'll try to use the first one available
method = MatchByType(paramTypes[0], controllerContext, found);
if (method != null)
{
return(true);
}
}
if (requestParam != null)
{
foreach (var paramType in paramTypes)
{
//check if this is IEnumerable and if so this will get it's type
//we need to know this since the requestParam will always just be a string
var enumType = paramType.GetEnumeratedType();
var converted = requestParam.TryConvertTo(enumType ?? paramType);
if (converted)
{
method = MatchByType(paramType, controllerContext, found);
if (method != null)
{
return(true);
}
}
}
}
method = null;
return(false);
}
private static ReflectedHttpActionDescriptor MatchByType(Type idType, HttpControllerContext controllerContext, ParameterSwapInfo found)
{
var controllerType = controllerContext.Controller.GetType();
var methods = controllerType.GetMethods().Where(info => info.Name == found.ActionName).ToArray();
if (methods.Length > 1)
{
//choose the one that has the parameter with the T type
var method = methods.FirstOrDefault(x => x.GetParameters().FirstOrDefault(p => p.Name == found.ParamName && p.ParameterType == idType) != null);
return(new ReflectedHttpActionDescriptor(controllerContext.ControllerDescriptor, method));
}
return(null);
}
