Implementing the view model class

Because the web services in Sitefinity follow the MVVM pattern, you must implement a view model class by performing the following:

1. From the context menu of the folder Web » Services » Data in the ProductsModule project, click Add » Class.
2. Name the class file ProductItemViewModel.cs and click Add.
3. Open the file ProductItemViewModel.cs.

4. Add the following using statements:

   using ProductsModule.Model;

   using Telerik.Sitefinity.GenericContent.Model;

   using Telerik.Sitefinity.Modules;

   using Telerik.Sitefinity.Modules.GenericContent;

5. Make the ProductItemViewModel class inherit the ContentViewModelBase class:

   public class ProductItemViewModel : ContentViewModelBase

   {

   }

6. Create the following constructors:

   public ProductItemViewModel()

       : base()

   {

   }

    

   public ProductItemViewModel(ProductItem contentItem, ContentDataProviderBase provider)

       : base(contentItem, provider)

   {

       this.Price = contentItem.Price;

       this.QuantityInStock = contentItem.QuantityInStock;

       this.WhatIsInTheBox = contentItem.WhatIsInTheBox;

   }

7. Define properties that match the properties in the ProductItem class. Following is the code for the Price, QuantityInStock, and WhatIsInTheBoxproperties:

   public decimal Price { get; set; }

    

   public int QuantityInStock { get; set; }

    

   public string WhatIsInTheBox { get; set; }

8. Implement the abstract members of the ContentViewModelBase class in the following way:

   protected override Content GetLive()

   {

       return this.provider.GetLiveBase<ProductItem>((ProductItem)this.ContentItem);

   }