Would it be considered poor design to send back a partial view with just a simple JavaScript alert in my ASP.NET MVC application?

Question

Would it be considered poor design to send back a partial view with just a simple JavaScript alert in my ASP.NET MVC application?

I have a unique Action method that handles exceptions by returning an _error partial view:

[AcceptVerbs(HttpVerbs.Post)]
public PartialViewResult Register(string id, int classid) {
    try
    {
        Thread.Sleep(3000);
        User user = r.FindUser(id);
        Users_Classes uc = new Users_Classes();
        uc.AddedDate = DateTime.Now;
        uc.ClassID = classid;
        user.Users_Classes.Add(uc);
        r.Save();
        ViewBag.classid = classid;
        return PartialView("_usersearch2", uc);
    }
    catch (DataException ex)
    { 
        return PartialView("_error");
    }

Here is the content of the _error partial view:

<script type="text/javascript">
    alert('The user might have been already Assinged, Search Again to get the latest users');
</script>

The current approach works well, but some may argue it is not a good design to display only an alert in a partial view. Are there better alternatives to achieve this functionality?

c#javascript asp.net-mvc-3

Answer 1

Answer №1

The issue arises when your implementation becomes tightly coupled with your user interface. Suddenly, the Controller is dictating how an error message should be visually presented to the client.

What if you decide to switch from displaying the error as an alert to showcasing it with a red border around a text input along with additional description text?

The responsibility of determining the visual display lies within the realm of your view. Your controller's role should solely be returning status codes, leaving the decision on how to proceed up to the view.

Answer 2

The issue arises when your implementation becomes tightly coupled with your user interface. Suddenly, the Controller is dictating how an error message should be visually presented to the client.

What if you decide to switch from displaying the error as an alert to showcasing it with a red border around a text input along with additional description text?

The responsibility of determining the visual display lies within the realm of your view. Your controller's role should solely be returning status codes, leaving the decision on how to proceed up to the view.

Answer 3

Answer №2

To improve your code, consider implementing error handling directly in your client-side JavaScript library instead of relying on inline scripts. This way, you can simply return a helpful error message without exposing the entire JavaScript functionality.

Answer 4

To improve your code, consider implementing error handling directly in your client-side JavaScript library instead of relying on inline scripts. This way, you can simply return a helpful error message without exposing the entire JavaScript functionality.

Answer 5

Answer №3

Typically, I would answer yes. However, there are occasions when a flawed design is exactly what is needed ;)

There's a special Controller method called Javascript that I occasionally utilize to generate executable javascript directly from my controller. This is done in rare situations where following the conventional approach is not practical:

[AcceptVerbs(HttpVerbs.Post)]
public PartialViewResult Register(string id, int classid) 
{
    try
    {
        ... stuff
    }
    catch (DataException ex)
    { 
        return Javascript("alert('The user might have been already Assinged, Search Again to get the latest users');");
    }
}

The existence of this method gives me comfort that I'm not completely disregarding best practices... unless, of course, I am misusing it, which is quite possible.

Answer 6

Typically, I would answer yes. However, there are occasions when a flawed design is exactly what is needed ;)

There's a special Controller method called Javascript that I occasionally utilize to generate executable javascript directly from my controller. This is done in rare situations where following the conventional approach is not practical:

[AcceptVerbs(HttpVerbs.Post)]
public PartialViewResult Register(string id, int classid) 
{
    try
    {
        ... stuff
    }
    catch (DataException ex)
    { 
        return Javascript("alert('The user might have been already Assinged, Search Again to get the latest users');");
    }
}

The existence of this method gives me comfort that I'm not completely disregarding best practices... unless, of course, I am misusing it, which is quite possible.

Would it be considered poor design to send back a partial view with just a simple JavaScript alert in my ASP.NET MVC application?

Answer №1

Answer №2

Answer №3

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