//ActionResult not IActionResult
//public override void ExecuteResult(ActionContext context)
//{
// PrepareMessage(context);
// InnerResult.ExecuteResult(context);
//}
private void PrepareMessage(ActionContext context)
{
var tempData = context.HttpContext.RequestServices.GetRequiredService<ITempDataDictionary>();
var alert = new Alert(AlertClass, Message);
if (AppendToExistingMessages)
tempData.AddAlert(alert);
else tempData.SetAlert(alert);
}
public static void AddAlert(this ITempDataDictionary tempData, Alert alert)
{
if (!tempData.ContainsKey(Alerts))
{
tempData.Set(Alerts, new List<Alert>());
}
var alerts = tempData.Get<List<Alert>>(Alerts);
alerts.Add(alert);
tempData.Set(Alerts, alerts);
}
public static void SetAlert(this ITempDataDictionary tempData, Alert alert)
{
if(tempData != null && alert != null)
tempData.Set(Alerts, new List<Alert> { alert });
}