Return void in an Actionresult method?

Question

I have this method below, and I need to have a condition that depending on it will open a new tab with a url:

public ActionResult Index()
{
    //condição
    return Response.Write(@"<script type='text/javascript' language='javascript'>window.open('page.html','_blank').focus();</script>");
}

tried

ScriptManager.RegisterStartupScript(this, this.GetType(), Guid.NewGuid().ToString(), sb.ToString(), true);

But it always returns that it is not possible to return void in a method ActionResult. And I really need you to open a new tab.

Answer 1

ActionResult is to use methods for this if you will not use a ActionResult so there’s no need to force it

The Response.Write is not part of the namespace System.Web.Mvc, return of an Actionresult must contain:

• System.Web.Mvc.ContentResult
• System.Web.Mvc.EmptyResult
• System.Web.Mvc.FileResult
• System.Web.Mvc.HttpStatusCodeResult
• System.Web.Mvc.JavaScriptResult
• System.Web.Mvc.JsonResult
• System.Web.Mvc.RedirectResult
• System.Web.Mvc.RedirectToRouteResult
• System.Web.Mvc.ViewResultBase

So if you want to use a "string" as output use Contentresult:

public ContentResult Index()  
{  
    return Content(@"<script type='text/javascript' language='javascript'>window.open('page.html','_blank').focus();</script>"));  
}

Which by default will return as text/html

Answer 2

maybe something along those lines:

public ActionResult NewWindow()
{
    return Content("<script>window.open('{url}','_blank')</script>");
}