ASP.NET MVC - HybridViewResult (ViewResult /PartialViewResult)

Question

Is it possible to build a hybrid ViewResult that returns in depedency of an AjaxRequest or HttpRequest a PartialViewResult or ViewResult?

IsAjaxRequest --> return PartialViewResult !IsAjaxRequest --> return ViewResult

As far as I know my HybridViewResult should derive from ViewResultBase.

But how to implement the FindView method?

Answer 1

can you not just make 2 different actions in that case? the 'shared' logic you could simply put in a [nonAction] method?

Answer 2

Try:

public class HybridViewResult : ActionResult
{
    public string ViewName { get; set; }
    public HybridViewResult () { }
    public HybridViewResult (string viewName ) { this.ViewName = viewName ; }
    public override void ExecuteResult(ControllerContext context)
    {
        if (context == null) throw new ArgumentNullException("context");
        var usePartial = ShouldUsePartial();
        ActionResult res = GetInnerViewResult(usePartial);
        res.ExecuteResult(context);
    }
    private ActionResult GetInnerViewResult(bool usePartial)
    {
        var view = ViewName;
        ActionResult res;
        if(String.IsNullOrEmpty(view)) {
             res = usePartial ? new PartialViewResult(view) : new ViewResult(view);
        }
        else {
             res = usePartial ? new PartialViewResult() : new ViewResult();
        }
        return res;
    }
    private bool ShouldUsePartial(ControllerContext context) {
        return false; //your code that checks if you need to use partial here
    }
}

Add any constructor & GetInnerViewResult variations as needed i.e. to pass Model.

Answer 3

This is a slightly more stripped down take on eglasius's answer. I'm actually tackling a similar problem except I need to return a JsonResult.

The (untested) NormalOrAjaxResult simply lets you specify an action result for the non ajax request and one for the ajax request. Because these are ActionResults you can mix up Redirect, View, Partial and Json view results.

public class NormalOrAjaxResult : ActionResult
{
    private readonly ActionResult _nonAjaxActionResult;
    private readonly ActionResult _ajaxActionResult;

    public NormalOrAjaxResult(ActionResult nonAjaxActionResult, ActionResult ajaxActionResult)
    {
        _nonAjaxActionResult = nonAjaxActionResult;
        _ajaxActionResult = ajaxActionResult;
    }

    public override void ExecuteResult(ControllerContext context)
    {
        var isAjaxRequest = context.HttpContext.Request["isAjax"];
        if (isAjaxRequest != null && isAjaxRequest.ToLower() == "true")
        {
            _ajaxActionResult.ExecuteResult(context);    
        } else
        {
            _nonAjaxActionResult.ExecuteResult(context);
        }
    }
}