Windows 8 Store Apps Learning (55) Binding: MVVM mode

Introduced

Re-imagine the bindings of Windows 8 Store Apps

Add, delete, modify and query data through MVVM mode

Example

1, Model layer

Binding/mvvm/model/productdatabase.cs

* * * Model layer Data persistence operation (local or remote) * * This example is only a demo/using System;
Using System.Collections.Generic;
    
Using System.Linq; Namespace XamlDemo.Binding.MVVM.Model {public class Productdatabase {private list<product> _produc
    
        ts = null;  Public list<product> getproducts () {if (_products = null) {Random
    
                Random = new Random ();
    
                _products = new list<product> (); for (int i = 0; i < i++) {_products.
                            ADD (new Product {ProductId = i, Name = "Name" + i.tostring (). PadLeft (4, ' 0 '), Category = "Category" + (char) random.
                Next (65, 91)});
        } return _products; } Public list<product> GetProducts (String name, String category) {return getproducts (). Where (P => p.name.contains (Name) && p.category.contains (Category)).
        ToList (); public void Update (product product) {var oldproduct = _products. Single (p => p.productid = = product.
            PRODUCTID);
        Oldproduct = product;
            Public product Add (string name, string category) {Product product =new product (); Product. ProductId = _products.
            Max (P => p.productid) + 1; Product.
            name = name; Product.
    
            Category = Category; _products.
    
            Insert (0, product);
        return product; public void Delete (product product) {_products.
        Remove (product); }
    }
}

Binding/mvvm/model/product.cs

* * * Model layer of the entity class, if need to notify the need to implement INotifyPropertyChanged interface * * using System.ComponentModel;
        Namespace XamlDemo.Binding.MVVM.Model {public class Product:inotifypropertychanged {public Product ()
            {ProductId = 0;
            Name = "";
        Category = "";
        } private int _productid;
            public int ProductId {get {return _productid;}
                set {_productid = value;
            raisePropertyChanged ("ProductId");
        }} private string _name;
            public string Name {get {_name;}
                set {_name = value;
            raisePropertyChanged ("Name");
        }} private string _category;
            public string Category {get {return _category;}
      set {_category = value;          raisePropertyChanged ("Category");
        } public event PropertyChangedEventHandler propertychanged;
                protected void raisePropertyChanged (string name) {if (propertychanged!= null) {
            PropertyChanged (This, new PropertyChangedEventArgs (name)); }
        }
    }
}