Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

MVC3 Newbie Question about dialog messages

Posted on 2012-04-12
4
Medium Priority
?
580 Views
Last Modified: 2012-06-21
Hi,
I am new to MVC (not web form). So when I first create MVC3 Application and choose Internet Template, VS generates a bunch of folders and files for me.

I noticed that the validation messages are scattered everywhere across the whole project in every logic layer. e.g.
in M - AccountModel you get:
[StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]

in V - Register.cshtml you get:
@Html.ValidationSummary(true, "Account creation was unsuccessful. Please correct the errors and try again.")
 
in C -  AccountController.cs you get:
switch (createStatus) {
                case MembershipCreateStatus.DuplicateUserName:
                    return "User name already exists. Please enter a different user name.";
                    .....


It is generated by VS, so I suppose it is a recommanded standard? I am scratching my head and asking myself, no way the industry will follow this spaghetti hard-coded messages in all layers? What is the .resx equivalent, and time and currency localization structure in MVC? Can I keep all these in the view layer, say, all in the .cshtml files, and not use controllers, or model properties/attributes to keep hard-coded messages?

I am a newbie, please help me :P
0
Comment
Question by:ThomasQ
  • 2
4 Comments
 
LVL 21

Expert Comment

by:Dale Burrell
ID: 37836417
MVC follows the DRY method (Don't Repeat Yourself).

Property validation is applied to properties in your model using attributes as you have indicated.

In the view you are telling the view where to display a summary of validation messages - same as in web forms. And in general you may tell the view where to display individual validations messages. Which is the correct logical way to do it, the model specifies what needs to be validated and how, the view specifies where and how to display validation messages.

In the controller you are carrying out checks/validation that are not specific to a property of the model, and in this case cannot be detected until you come to try and create the user. You can add an AJAX validation check to see if the user already exists, but at the end of the day you have to try a create the user with a given username before you can succeed of fail - you can't try that any earlier.

All very straight forward and certainly not spaghetti code :)
0
 
LVL 21

Accepted Solution

by:
Dale Burrell earned 2000 total points
ID: 37836425
0
 
LVL 14

Expert Comment

by:binaryevo
ID: 37837633
dale_burrell hit the nail on the head the only thing i would have to add and is probably a personal preference more than anything, is the use of another design / sub pattern between your view and your controller called Model View View Model ( MVVM ).  Take a look at the links below they may help you:


http://stephenwalther.com/blog/archive/2009/04/13/asp-net-mvc-tip-50-ndash-create-view-models.aspx

http://blogs.microsoft.co.il/blogs/helpercoil/archive/2010/08/28/asp-net-mvc-and-the-mvvm-pattern.aspx
0
 

Author Closing Comment

by:ThomasQ
ID: 37840441
I just have not fit in the MVC design concept. Normally I would make the data layer and logic layer report enumeration values, then the UI would interrupt them into text messages.
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
Simulator games are perfect for generating sample realistic data streams, especially for learning data analysis. It is even useful for demoing offerings such as Azure stream analytics, PowerBI etc.
When cloud platforms entered the scene, users and companies jumped on board to take advantage of the many benefits, like the ability to work and connect with company information from various locations. What many didn't foresee was the increased risk…
How can you see what you are working on when you want to see it while you to save a copy? Add a "Save As" icon to the Quick Access Toolbar, or QAT. That way, when you save a copy of a query, form, report, or other object you are modifying, you…
Suggested Courses

564 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question