public FormFlowInstance <TState> CreateInstance <TState>(
TState state,
IReadOnlyDictionary <object, object> properties = null)
{
if (state == null)
{
throw new ArgumentNullException(nameof(state));
}
if (typeof(TState) != _flowDescriptor.StateType)
{
throw new InvalidOperationException(
$"{typeof(TState).Name} is not compatible with {_flowDescriptor.StateType.Name}.");
}
var instanceId = FormFlowInstanceId.Generate(
_flowDescriptor,
_actionContext.HttpContext.Request,
_actionContext.RouteData);
var instance = (FormFlowInstance <TState>)_stateProvider.CreateInstance(
_flowDescriptor.Key,
instanceId,
_flowDescriptor.StateType,
state, properties);
_actionContext.HttpContext.Features.Set(new FormFlowInstanceFeature(instance));
return(instance);
}
