private CollectionsQueryModelParameterDetails GetDetailsForActionParameter(ActionParameter actionParam)
{
string key = nameof(CollectionsQueryModelParameterDetails);
var value = actionParam.GetAdditionalDataOrDefault <CollectionsQueryModelParameterDetails>(key);
if (value == null)
{
value = new CollectionsQueryModelParameterDetails(actionParam.Type);
actionParam.SetAdditionalData(key, value);
}
return(value);
}
/// <summary>
/// Parses query parameter
/// </summary>
/// <param name="request">HTTP request from which to retrieve value(s).</param>
/// <param name="actionCtx">Action context of the parameter.</param>
/// <param name="parameter">The parameter to parse.</param>
/// <returns>
/// object, Value of the parameter
/// </returns>
/// <exception cref="System.NotImplementedException"></exception>
public override object ParseParameterValue(HttpRequest request, ActionContext actionCtx, ActionParameter parameter)
{
CollectionsQueryModelParameterDetails details = GetDetailsForActionParameter(parameter);
string key = null;
IEnumerable <KeyValuePair <string, StringValues> > source = null;
if (parameter.ParameterSource == ParameterSources.Query)
{
source = request.Query;
}
else if (parameter.ParameterSource == ParameterSources.Header)
{
source = request.Headers;
}
if (source != null)
{
key = source.FirstOrDefault(x => x.Key.ToLower() == parameter.Name).Key;
}
string[] values = new string[0];
if (key != null)
{
values = source.FirstOrDefault(x => x.Key == key).Value;
if (values == null)
{
values = new string[0];
}
}
if (details.IsArray || details.IsIEnumerable)
{
Array a = Array.CreateInstance(details.OriginalCollectionElementType, values.Length);
for (int i = 0; i < values.Length; i++)
{
a.SetValue(ParseSingleQueryValue(values[i], details.CollectionElementType, details.IsCollectionElementTypeNullable, parameter.Name, new Lazy <string>(() => parameter.ParentActionContext.ToString())), i);
}
return(a);
}
if (details.IsList)
{
IList parsedValues = Activator.CreateInstance(parameter.Type) as IList;
foreach (var value in values)
{
parsedValues.Add(ParseSingleQueryValue(value, details.CollectionElementType, details.IsCollectionElementTypeNullable, parameter.Name, new Lazy <string>(() => parameter.ParentActionContext.ToString())));
}
return(parsedValues);
}
throw new Exception($"Parameter {parameter} in action {actionCtx} is not array, list or IEnumerable.");
}
