WPF MVVM 简单实现

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public class DelegateCommands:ICommand    {        public bool CanExecute(object parameter)        {            if (CanExecuteHander == null)                return true;            return CanExecuteHander(parameter);        }        public event EventHandler CanExecuteChanged;        public void Execute(object parameter)        {            if (ExecuteHander == null)                return;            ExecuteHander(parameter);        }        public Func<object, bool> CanExecuteHander;        public Action<object> ExecuteHander;    }

/// <summary>    /// 通知属性    /// </summary>    public class NotifyPropertyChanged:INotifyPropertyChanged    {        public event PropertyChangedEventHandler PropertyChanged;        public void RasePropertyChange(string propertyName)        {            if (PropertyChanged != null)            {                this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));            }        }    }

public class AddViewModel:NotifyPropertyChanged    {        private int input1;        public int Input1        {            get { return this.input1; }            set            {                this.input1 = value;                this.RasePropertyChange("Input1");            }        }        private int input2;        public int Input2        {            get { return this.input2; }            set            {                this.input2 = value;                this.RasePropertyChange("Input2");            }        }        private int result;        public int Result        {            get { return this.result; }            set            {                this.result = value;                this.RasePropertyChange("Result");            }        }        public DelegateCommands Add { get; set; }        public void AddResult(object parameter)        {            this.Result = this.Input1 + this.Input2;        }        public AddViewModel()        {            this.Add = new DelegateCommands();            Add.ExecuteHander += new Action<object>(AddResult);        }    }

<StackPanel Orientation="Horizontal" Margin="20">        <TextBox Text="{Binding Input1}" ></TextBox>        <TextBox Text="{Binding Input2}"></TextBox>        <TextBox Text="{Binding Result}"></TextBox>        <Button Command="{Binding Add}">加</Button>    </StackPanel>

 public MainWindow()        {            InitializeComponent();            this.DataContext = new AddViewModel();        }

注：在xaml文件中绑定数据以及命令的数据源，WPF默认情况下会使用冒泡的方式找DataContent的对象

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