One of the strong features to come in MVC 2 was the ability to create metadata classes that allowed you to specify the metadata that was linked to the model. You could decorate properties with the StringLength, Range and RegularExpression attribute. Sometimes you want to add HTML attributes to your elements, say if you want to set the tab index for an input control. You could do this, but then you’re adding extra mark-up that could be placed elsewhere:
The crux of the code lies with a class that derives from DataAnnotationsModelMetadataProvider. This class implements the default model metadata provider. All you need to do is override CreateMetadata and find the AdditionalValues collection. This is where you’ll insert your own custom object. Here’s the code below:
Calling the base class you can find the metadata for the property. One of the properties is AdditonalValues. This value gets a dictionary that contains additional metadata about the model. Basically what’s happening in the code above is when the view is rendered, the framework will look through all the attributes associated to the property. If it finds an attribute called AdditionalHtml (which we haven’t created yet), it will add it the properties AdditionalValues property. Make sense? Let’s add the AdditionalHtml class now:
The class is intended to be used as an attribute, hence why it’s deriving from Attribute. There’s one public method called OptionalAttributes, and all that does is add values to a dictionary and returns that. This dictionary will be used as the input for the AdditionalValues in the previous section. The public properties relate to attributes you can use on HTML input’s, such as readonly, maxlength and css classes.
To use this new attribute, you need to decorate the properties in your metadata class like this:
This class is linked to the model, Employee, by using the MetadataType attribute:
And finally to use this, I’m using a templated helper to output the view. Because the two properties are strings, the templated helper must be called string.cshtml and reside in the EditorTemplates folder
The final step is to let the framework know it should use this as the default ModelMetadataProvider. This is done through the global.asax file:
When the view is rendered, the framework uses the templated helper to display any properties whose data type is string. If it finds one, it grabs the metadata and checks if it’s been decorated with the AdditionalHtml attribute. If it does, it renders that as the additional html attributes. The result is below:
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.
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.
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.