Instead of having to maintain simple validation logic in two places (your business classes and your jQuery code), you can now use the Data Annotations attributes and metadata "buddy" classes to decorate your models. Those decorated models will automatically generate the appropriate jQuery code to enforce all of your validation rules on the client side before the form is ever submitted. Let's see how this works.
First, we need a model class. Let's do something simple like Customer:
public partial class Customer
{
public string Name { get; set; }
public int Age { get; set; }
}
This is great. I love the fact that it doesn't look ugly and view developers can look at it and immediately know what fields are available and they don't need to sift through a pile of persistence garbage or validation logic. You might have noticed that I've made this class partial. The reason I'm doing this is because I'm going to create another file called Customer.metadata.cs. There are other samples on the web that don't do this, but I like cleanly separating the definition of my model from the validation logic for that model. Here's a look at my Customer.metadata.cs file:
[MetadataType(typeof(CustomerMetaData))]
public partial class Customer
{
class CustomerMetaData
{
[Required(ErrorMessage="You must supply a name for a customer.")]
[StringLength(50, ErrorMessage = "A customer name cannot exceed 50 characters.")]
public string Name { get; set; }
}
}
What I've done here is used a metadata "buddy class" (that's what posts from Scott Guthrie and Scott Hanselman have been calling them, so I'm sticking with convention here). This buddy class is a placeholder for all my validation logic attributes and the runtime will then merge all this stuff onto the actual model. MVC 2 will then examine the model and , with a few lines of code in the view, generate the appropriate jQuery client-side validation logic.
In your view code, add the following 3 script declarations:
<script type="text/javascript" src="../../Scripts/jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="../../Scripts/jquery.validate.min.js"></script>
<script type="text/javascript" src="../../Scripts/MicrosoftMvcJQueryValidation.js"></script>
Finally, somewhere before the start of your form tag, add the following markup to the view code:
<% Html.EnableClientValidation(); %>
This will invoke the code that reads through the strongly typed model for your view, figures out all of the validation logic that applies, and generates the appropriate jQuery code.
While you could write your own jQuery validation code if you felt like it, using data annotations and MVC 2, you no longer have to maintain your validation logic in two places. The attributes apply to a single view model and all you have to do is change one of those attributes and the generated jQuery code will change as well. This is a huge timesaver and promises to dramatically increase overall productivity of developers building large-scale MVC 2 applications, especially LOB apps with lots of data entry forms.
Reasons why you must trust ASPHostPortal.com
Every provider will tell you how they treat their support, uptime, expertise, guarantees, etc., are. Take a close look. What they’re really offering you is nothing close to what ASPHostPortal does. You will be treated with respect and provided the courtesy and service you would expect from a world-class web hosting business.
You’ll have highly trained, skilled professional technical support people ready, willing, and wanting to help you 24 hours a day. Your web hosting account servers are monitored from three monitoring points, with two alert points, every minute, 24 hours a day, 7 days a week, 365 days a year. The followings are the list of other added- benefits you can find when hosting with us:
- DELL Hardware
Dell hardware is engineered to keep critical enterprise applications running around the clock with clustered solutions fully tested and certified by Dell and other leading operating system and application providers.
- Recovery Systems
Recovery becomes easy and seamless with our fully managed backup services. We monitor your server to ensure your data is properly backed up and recoverable so when the time comes, you can easily repair or recover your data.
- Control Panel
We provide one of the most comprehensive customer control panels available. Providing maximum control and ease of use, our Control Panel serves as the central management point for your ASPHostPortal account. You’ll use a flexible, powerful hosting control panel that will give you direct control over your web hosting account. Our control panel and systems configuration is fully automated and this means your settings are configured automatically and instantly.
- Excellent Expertise in Technology
The reason we can provide you with a great amount of power, flexibility, and simplicity at such a discounted price is due to incredible efficiencies within our business. We have not just been providing hosting for many clients for years, we have also been researching, developing, and innovating every aspect of our operations, systems, procedures, strategy, management, and teams. Our operations are based on a continual improvement program where we review thousands of systems, operational and management metrics in real-time, to fine-tune every aspect of our operation and activities. We continually train and retrain all people in our teams. We provide all people in our teams with the time, space, and inspiration to research, understand, and explore the Internet in search of greater knowledge. We do this while providing you with the best hosting services for the lowest possible price.
- Data Center
ASPHostPortal modular Tier-3 data center was specifically designed to be a world-class web hosting facility totally dedicated to uncompromised performance and security
- Monitoring Services
From the moment your server is connected to our network it is monitored for connectivity, disk, memory and CPU utilization – as well as hardware failures. Our engineers are alerted to potential issues before they become critical.
- Network
ASPHostPortal has architected its network like no other hosting company. Every facet of our network infrastructure scales to gigabit speeds with no single point of failure.
- Security
Network security and the security of your server are ASPHostPortal’s top priorities. Our security team is constantly monitoring the entire network for unusual or suspicious behavior so that when it is detected we can address the issue before our network or your server is affected.
- Support Services
Engineers staff our data center 24 hours a day, 7 days a week, 365 days a year to manage the network infrastructure and oversee top-of-the-line servers that host our clients’ critical sites and services.