XAF 如何扩展应用程序模型<二> 编辑ListView自动保存

 

using System;
using System.ComponentModel;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;

using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Actions;
using DevExpress.Persistent.Base;
using DevExpress.ExpressApp.Model;
using DevExpress.ExpressApp.Win.SystemModule;

namespace XafExtendTest.Module.SystemModule
{
    public interface IModelClassAutoCommitListView : IModelNode
    {
        [Category("MyCustomProperty")]
        [Description("Control if change on editable listview will be autocommited")]
        bool AutoCommitListview { get; set; }
    }
    [ModelInterfaceImplementor(typeof(IModelClassAutoCommitListView),"ModelClass")]
    public interface IModelListViewAutoCommitListView : IModelClassAutoCommitListView
    {
    }
    public class AutoCommitListViewController : ViewController<ListView>,IModelExtender
    {
        protected override void OnViewControllersActivated()
        {
            base.OnActivated();
            var winDetailViewController = Frame.GetController<WinDetailViewController>();
            if (winDetailViewController != null && ((IModelListViewAutoCommitListView)View.Model).AutoCommitListview)
            {
                winDetailViewController.AutoCommitListView = true;
                View.QueryCanChangeCurrentObject += View_QueryCanChangeCurrentObject;
            }
        }

        void View_QueryCanChangeCurrentObject(object sender, CancelEventArgs e)
        {
            if(Frame.GetController<WinDetailViewController>().SuppressConfirmation)
                ObjectSpace.CommitChanges();
        }

        protected override void OnDeactivated()
        {
            base.OnDeactivated();
            var winDetailViewController = Frame.GetController<WinDetailViewController>();
            if (winDetailViewController != null && ((IModelListViewAutoCommitListView)View.Model).AutoCommitListview)
            {
                winDetailViewController.AutoCommitListView = true;
                View.QueryCanChangeCurrentObject -= View_QueryCanChangeCurrentObject;
            }
        }
        void IModelExtender.ExtendModelInterfaces(ModelInterfaceExtenders extenders)
        {
            extenders.Add<IModelClass, IModelClassAutoCommitListView>();
            extenders.Add<IModelListView, IModelListViewAutoCommitListView>();
        }
    }
}

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