无法使用文本框进行管理。分配了模板的文本绑定

Question

我有模型合作伙伴：

public class Partner
{
public Guid Id { get; set; }
public string Title { get; set; }
public string Comment { get; set; }
public override string ToString()
{
return Title;
}
}

使用此xaml:查看

<Window x:Class="WpfExtandedTextBox.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:ModelViews="clr-namespace:WpfExtandedTextBox"
d:DataContext="{d:DesignInstance ModelViews:ViewModel}"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800" Loaded="Window_Loaded">
<Window.Resources>
<ControlTemplate x:Key="entityTextBoxTemplate" TargetType="TextBox">
<StackPanel Orientation="Horizontal">
<TextBox MinWidth="200" Text="{Binding Partner.Title, Mode=TwoWay}"/>
<TextBlock MaxWidth="0" Visibility="Hidden" Text="{Binding Partner.Id, Mode=TwoWay}"/>
<Button x:Name="OpenPartnerList" Content="..." Click="OpenPartnerList_Click"/>
<Button x:Name="OpenPartner" Content="O" Click="OpenPartner_Click"/>
<Button x:Name="ClearPartner" Content="X" Click="ClearPartner_Click"/>
</StackPanel>
</ControlTemplate>
</Window.Resources>
<StackPanel Orientation="Vertical" >
<TextBox x:Name="TextBoxSelectedPartner" Template="{StaticResource entityTextBoxTemplate}" HorizontalAlignment="Center" VerticalAlignment="Center" />
<!--<Button x:Name="ChoosePartner" Click="ChoosePartner_Click" Content="Choose partner"/>
<DataGrid ItemsSource="{Binding Partners}" AutoGenerateColumns="True" />-->
</StackPanel>
</Window>

和视图模型：

public class ViewModel : BaseViewModel
{
private List<Partner> partners;
public List<Partner> Partners
{
get { return this.partners; }
}
private Partner partner;
public Partner Partner
{
get { return this.partner; }
set
{
this.partner = value;
NotifyPropertyChanged();
}
}
public ViewModel()
{
AppDbContext db = new AppDbContext();
this.partners = db.Partners.ToList();
db.Dispose();
}
}

我想创建具有3个按钮的TextBox：1-用于从某些列表中选择合作伙伴2-用于打开带有合作伙伴详细信息的窗口3-用于清除TextBox

为此，我创建了ControlTemplate"entityTextBoxTemplate"：TextBox用于存储Partner。标题和隐藏的TextBlock用于存储Partner。Id。我假设从列表中选择合作伙伴后，TextBox和TextBlock将分别填充Title和Id，但这不起作用，我不知道为什么。有人能帮我解决这个问题吗？

更新时间：合作伙伴填充在以下代码中：

private void PartnerListView_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
viewModel.Partner = ((PartnerListView)sender).SelectedPartner;
}

更新2:

我的BaseViewModel：

public class BaseViewModel
{
public event PropertyChangedEventHandler PropertyChanged;
public void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}

我的固定BaseViewModel：

public class BaseViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}

我只是忘记指定实现的接口："：INotifyPropertyChanged">

Answer 1

您的类Partner可能是INotifyPropertyChanged(我给您设置了Title的代码，您对象的其他参数也是如此(

public class Partner : INotifyPropertyChanged
{
private string title;
public string Title
{
get { return this.title; }
set
{
if (this.title != value)
{
this.title = value;
this.NotifyPropertyChanged("Title");
}
}
}
public override string ToString()
{
return Title;
}
public event PropertyChangedEventHandler PropertyChanged;
public void NotifyPropertyChanged(string propName)
{
if (this.PropertyChanged != null)
this.PropertyChanged(this, new PropertyChangedEventArgs(propName));
}
}