Question

Hi I have some codes that need to run for 1 time for a request. I have a BaseController which all controllers derived from. I write my code to BaseController onActionExecuting method but it is not good because for every action execution code is running. I can prenvent it with a basic if clause but i dont want to use it like that.

What is the best place for run a code 1 time for a request. I also want to reach HttpContext where i write this code. thanks

Answer 1

After your comment about child actions you could test if the current action is a child action and don’t execute the code. So you could have a custom action filter:

public class CustomFilterAttribute : ActionFilterAttribute
{
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        // this method happens before calling the action method

        if (!filterContext.IsChildAction)
        {
            // this is not the a child action => do the processing
        }
        base.OnActionExecuting(filterContext);
    }
}

and then decorate your base controller with this custom attribute. Similar test could be performed in the overridden OnActionExecuting method of your base controller if you prefer it instead of action attributes:

protected override void OnActionExecuting(ActionExecutingContext filterContext)
{
    if (!filterContext.IsChildAction)
    {
        // this is not the a child action => do the processing
    }
    base.OnActionExecuting(filterContext);
}