Silverlight MVVM

通知属性修改

using System;using System.ComponentModel;using System.Linq.Expressions;using System.Runtime.Serialization;namespace Microsoft.Practices.Prism.ViewModel{    [DataContract]    public abstract class NotificationObject : INotifyPropertyChanged    {        protected NotificationObject();        public event PropertyChangedEventHandler PropertyChanged;        protected void RaisePropertyChanged<T>(Expression<Func<T>> propertyExpression);        protected void RaisePropertyChanged(params string[] propertyNames);        protected virtual void RaisePropertyChanged(string propertyName);    }}

Command 注册类

using System;namespace Microsoft.Practices.Prism.Commands{    public class DelegateCommand<T> : DelegateCommandBase    {        public DelegateCommand(Action<T> executeMethod);        public DelegateCommand(Action<T> executeMethod, Func<T, bool> canExecuteMethod);        public bool CanExecute(T parameter);        public void Execute(T parameter);    }}

添加触发事件

添加一个触发事件类

using System;using System.Net;using System.Reflection;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Ink;using System.Windows.Input;using System.Windows.Interactivity;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;namespace DTO.SL{    /// <summary>    /// Trigger触发的事件类    /// </summary>    public class ExecuteCommandAction : TriggerAction<FrameworkElement>    {        public static readonly DependencyProperty CommandNameProperty =            DependencyProperty.Register("CommandName", typeof(string), typeof(ExecuteCommandAction), null);        public string CommandName        {            get { return (string)GetValue(CommandNameProperty); }            set { SetValue(CommandNameProperty, value); }        }        public static readonly DependencyProperty CommandParameterProperty =            DependencyProperty.Register("CommandParameter", typeof(object), typeof(ExecuteCommandAction), null);        public object CommandParameter        {            get { return GetValue(CommandParameterProperty); }            set { SetValue(CommandParameterProperty, value); }        }        private static bool IsCommandProperty(PropertyInfo property)        {            return typeof(ICommand).IsAssignableFrom(property.PropertyType);        }        /// <summary>        /// 重写Invoke方法        /// </summary>        /// <param name="parameter"></param>        protected override void Invoke(object parameter)        {            if (AssociatedObject == null)            {                return;            }            ICommand command = null;            var dataContext = AssociatedObject.DataContext;            foreach (var item in dataContext.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance))            {                if (IsCommandProperty(item) && string.Equals(item.Name, CommandName, StringComparison.Ordinal))                {                    command = (ICommand)item.GetValue(dataContext, null);                }            }            if ((command != null) && command.CanExecute(CommandParameter))            {                command.Execute(CommandParameter);            }        }    }}

Xaml代码

       xmlns:Custom="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"        xmlns:myConvert="clr-namespace:DTO.SL;assembly=DTO.SL"          <Button Width="100" Height="50" Content="大" >                <Custom:Interaction.Triggers>                    <Custom:EventTrigger EventName="Click">                        <myConvert:ExecuteCommandAction CommandName="MaxCommand"></myConvert:ExecuteCommandAction>                    </Custom:EventTrigger>                </Custom:Interaction.Triggers>            </Button>

CS代码

using Microsoft.Practices.Prism.ViewModel;using Microsoft.Practices.Prism.Commands;        private ICommand maxCommand;        public ICommand MaxCommand        {            get { return maxCommand; }            set { maxCommand = value; }        }     MaxCommand = new DelegateCommand(() =>                {                    //事件内容                });