|ZYCWPF| Interaction.Triggers 触发后台属性更新后台属性时报错的总题，有示例

<Window x:Class="SQRC_ViewModel觖发修改ViewModel属性.MainWindow"

         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions"

          xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"

 

         Title="{Binding Title}" Height="350" Width="525">

     <Grid>

         <Border Name="brInkMessage" Grid.Column="1" Grid.Row="2">

             <StackPanel>

                 <TextBox x:Name="txt3" Text="{Binding IsLogin, UpdateSourceTrigger=PropertyChanged}" />

                 <i:Interaction.Triggers>

                     <ei:DataTrigger Binding="{Binding IsLogin}" Value="True">

                         <ei:ChangePropertyAction TargetObject="{Binding}" PropertyName="Title"  Value="Changed" />

                     </ei:DataTrigger>

                 </i:Interaction.Triggers>

             </StackPanel>

         </Border>

     </Grid>

 </Window>

using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Linq;

 using System.Text;

 using System.Windows;

 using System.Windows.Controls;

 using System.Windows.Data;

 using System.Windows.Documents;

 using System.Windows.Input;

 using System.Windows.Media;

 using System.Windows.Media.Imaging;

 using System.Windows.Navigation;

 using System.Windows.Shapes;

 

 namespace SQRC_ViewModel觖发修改ViewModel属性

 {

     /// <summary>

     /// MainWindow.xaml 的交互逻辑

     /// </summary>

     public partial class MainWindow : Window

     {

         public MainWindow()

         {

             InitializeComponent();

             this.DataContext = new MainWindowViewModel();

         }

     }

 

     class MainWindowViewModel : NotificationObject

     {

         private string title;

         /// <summary>

         /// ??

         /// </summary>

         public string Title

         {

             get { return title; }

             set

             {

                 title = value;

                 this.RaisePropertyChanged("Title");

             }

         }

 

         private bool isLogin;

         /// <summary>

         /// ??

         /// </summary>

         public bool IsLogin

         {

             get { return isLogin; }

             set

             {

                 isLogin = value;

                 this.RaisePropertyChanged("IsLogin");

             }

         }

     }

 

     class NotificationObject : INotifyPropertyChanged

     {

         public event PropertyChangedEventHandler PropertyChanged;

 

         public void RaisePropertyChanged(string propertyName)

         {

             if (this.PropertyChanged != null)

             {

                 this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs(propertyName));

             }

         }

     }

 } 

以上我的XAML中写了一个数据触发器，当IsLogin=true的时候将Title改为Changed
运行是正常的
但是把觖发器中的
<ei:DataTrigger Binding="{Binding IsLogin}" Value="True">
改为
<ei:DataTrigger Binding="{Binding IsLogin}" Value="False">
后就出现错误了
提示：Cannot find a property named "Title" on type "StackPanel"

这个要怎么解决

谢谢

PS:可能你们会说，我这样的业务逻辑不对，但是会存在这个情况，当多皮肤的时候，有一个皮肤想根据登录情况来自定自己的标题，这样是他自定义的其他模版都没有，所以在XAML中修改是比较好的情况

谢谢