TabControl.ContentTemplateSelector 属性

参考

定义

命名空间:: System.Windows.Controls

程序集:: PresentationFramework.dll

重要

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获取或设置为选择用于显示控件内容的模板提供自定义逻辑的 DataTemplateSelector。

public:
 property System::Windows::Controls::DataTemplateSelector ^ ContentTemplateSelector { System::Windows::Controls::DataTemplateSelector ^ get(); void set(System::Windows::Controls::DataTemplateSelector ^ value); };

public System.Windows.Controls.DataTemplateSelector ContentTemplateSelector { get; set; }

member this.ContentTemplateSelector : System.Windows.Controls.DataTemplateSelector with get, set

Public Property ContentTemplateSelector As DataTemplateSelector

属性值

DataTemplateSelector

ContentTemplateSelector。默认值为 null。

示例

下面的示例使用 ContentTemplateSelector 属性根据所选人员的家乡以不同的方式显示内容 TabItem 。

<DataTemplate x:Key="DetailTemplate">
  <Border Width="300" Height="100" Margin="20"
          BorderBrush="Aqua" BorderThickness="1" Padding="8">
    <Grid>
      <Grid.RowDefinitions>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
      </Grid.RowDefinitions>
      <Grid.ColumnDefinitions>
        <ColumnDefinition Width="100"/>
        <ColumnDefinition/>
      </Grid.ColumnDefinitions>
      <TextBlock Grid.Row="0" Grid.Column="0" Text="First Name:"/>
      <TextBlock Grid.Row="0" Grid.Column="1" Text="{Binding Path=FirstName}"/>
      <TextBlock Grid.Row="1" Grid.Column="0" Text="Last Name:"/>
      <TextBlock Grid.Row="1" Grid.Column="1" Text="{Binding Path=LastName}"/>
      <TextBlock Grid.Row="2" Grid.Column="0" Text="Home Town:"/>
      <TextBox Grid.Row="2" Grid.Column="1" Text="{Binding Path=HomeTown}"/>
    </Grid>
  </Border>
</DataTemplate>

<DataTemplate x:Key="SeattleTemplate">
  <DataTemplate.Resources>
    <Style TargetType="TextBlock">
      <Setter Property="FontSize" Value="16"/>
    </Style>
  </DataTemplate.Resources>
  <Border Width="300" Height="100" Margin="20"
          BorderBrush="DarkSeaGreen" BorderThickness="3" Padding="15">
    <Grid>
      <Grid.RowDefinitions>
        <RowDefinition/>
        <RowDefinition/>
        <RowDefinition/>
      </Grid.RowDefinitions>
      <Grid.ColumnDefinitions>
        <ColumnDefinition Width="120"/>
        <ColumnDefinition/>
      </Grid.ColumnDefinitions>
      <TextBlock Grid.Row="0" Grid.Column="0" Text="Please welcome"/>
      <DockPanel Grid.Row="0" Grid.Column="1" >
        <TextBlock Text="{Binding Path=FirstName}"/>
        <TextBlock Text=" "/>
        <TextBlock Text="{Binding Path=LastName}"/>
      </DockPanel>
      <TextBlock Grid.Row="1" Grid.ColumnSpan="2" Text="from the Emerald City!"/>
    </Grid>
  </Border>
</DataTemplate>

<!--Bind to the collection MyFriends and use a DataTemplateSelector
to specify the appearance of the content.-->
<TabControl Name="tabCtrl1" Width="400" Height="200" 
         ItemsSource="{Binding Source={StaticResource MyFriends}}"
         ContentTemplateSelector="{StaticResource PersonSelector}"/>

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

namespace TabControlContentTemplateSelector
{
    // Create a class that represents a person.  
    // This class contains a person's first name, last name, 
    // and hometown.
    public class Person : INotifyPropertyChanged
    {
        private string firstname;
        private string lastname;
        private string hometown;

        public event PropertyChangedEventHandler PropertyChanged;

        public Person()
        {
        }

        public Person(string first, string last, string town)
        {
            this.firstname = first;
            this.lastname = last;
            this.hometown = town;
        }

        public override string ToString()
        {
            return firstname.ToString();
        }

        public string FirstName
        {
            get { return firstname; }
            set
            {
                firstname = value;
                OnPropertyChanged("FirstName");
            }
        }

        public string LastName
        {
            get { return lastname; }
            set
            {
                lastname = value;
                OnPropertyChanged("LastName");
            }
        }

        public string HomeTown
        {
            get { return hometown; }
            set
            {
                hometown = value;
                OnPropertyChanged("HomeTown");
            }
        }

        protected void OnPropertyChanged(string info)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(info));
            }
        }
    }

public class PersonTemplateSelector : DataTemplateSelector
{
    public override DataTemplate SelectTemplate(object item, DependencyObject container)
    {

        // The content of each TabItem is a Person object.
        if (item is Person)
        {
            Person person = item as Person;

            Window win = Application.Current.MainWindow;

            // Select one of the DataTemplate objects, based on the 
            // person's home town.
            if (person.HomeTown == "Seattle")
            {
                return win.FindResource("SeattleTemplate") as DataTemplate;
            }
            else
            {
                return win.FindResource("DetailTemplate") as DataTemplate;
            }
        }

        return null;
    }
}

Imports System.ComponentModel

Public Class Person
    Implements INotifyPropertyChanged

    ' Events
    Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged

    ' Methods
    Public Sub New()
    End Sub

    Public Sub New(ByVal first As String, ByVal last As String, ByVal town As String)
        Me._firstname = first
        Me._lastname = last
        Me._hometown = town
    End Sub

    Private Sub OnPropertyChanged(ByVal info As String)
        RaiseEvent PropertyChanged(Me, New PropertyChangedEventArgs(info))
    End Sub

    Public Overrides Function ToString() As String
        Return Me._firstname.ToString
    End Function


    ' Properties
    Public Property FirstName() As String
        Get
            Return Me._firstname
        End Get
        Set(ByVal value As String)
            Me._firstname = value
            Me.OnPropertyChanged("FirstName")
        End Set
    End Property

    Public Property HomeTown() As String
        Get
            Return Me._hometown
        End Get
        Set(ByVal value As String)
            Me._hometown = value
            Me.OnPropertyChanged("HomeTown")
        End Set
    End Property

    Public Property LastName() As String
        Get
            Return Me._lastname
        End Get
        Set(ByVal value As String)
            Me._lastname = value
            Me.OnPropertyChanged("LastName")
        End Set
    End Property


    ' Fields
    Private _firstname As String
    Private _hometown As String
    Private _lastname As String
End Class

Public Class PersonTemplateSelector
    Inherits DataTemplateSelector

    Public Overrides Function SelectTemplate(ByVal item As Object, _
                     ByVal container As DependencyObject) As DataTemplate

        ' The content of each TabItem is a Person object.
        If TypeOf item Is Person Then

            Dim person As Person = item

            Dim win As Window = Application.Current.MainWindow

            ' Select one of the DataTemplate objects, based on the 
            ' person's home town.
            If person.HomeTown = "Seattle" Then
                Return win.FindResource("SeattleTemplate")
            Else
                Return win.FindResource("DetailTemplate")

            End If
        End If

        Return Nothing
    End Function

End Class

注解

通常，为同一类型的对象创建 DataTemplateSelector 多个 DataTemplate 对象时，需要提供自己的逻辑，以便根据每个数据对象的属性选择 DataTemplate 应用。请注意，如果有不同类型的对象，可以在该DataTemplate属性上设置DataType属性。如果这样做，则无需创建。DataTemplateSelector 此外，如果对象的类型相同，但具有不同的属性，还可以考虑使用 DataTrigger 或数据转换器。有关详细信息，请参阅数据模板化概述。

若要创建模板选择器，请创建继承自 DataTemplateSelector 该方法并重写方法的 SelectTemplate 类。定义类后，可以将类的实例分配给元素的模板选择器属性。

ContentTemplateSelector如果同时设置了属性和ContentTemplate属性，则忽略此属性。

XAML 属性用法

<object ContentTemplateSelector="{ResourceExtension DataTemplateSelectorClassKey}"/>

XAML 属性元素用法

<object>  
  <object.ContentTemplateSelector>  
    <MyDataTemplateSelectorImplementation .../>  
  </object.ContentTemplateSelector>  
</object>

XAML 值

ResourceExtension
下列项之一： StaticResource或 DynamicResource。请参阅 XAML 资源。

DataTemplateSelectorClassKey
用于标识所请求的选择器实现的密钥。该键是指实现实际 SelectTemplate 替代的派生类。有关如何映射自定义类的信息，请参阅 WPF XAML 的 XAML 命名空间和命名空间映射。还可以以编程方式将类的 DataTemplateSelector 实例作为资源添加到资源字典。

MyDataTemplateSelectorImplementation
派生 DataTemplateSelector 自和重写的 SelectTemplate类。有关如何映射自定义类的信息，请参阅 WPF XAML 的 XAML 命名空间和命名空间映射。

依赖项属性信息


标识符字段	ContentTemplateSelectorProperty
元数据属性设置为 `true`	无

适用于

TabControl.ContentTemplateSelector 属性

定义

属性值

示例

注解

XAML 属性用法

XAML 属性元素用法

XAML 值

依赖项属性信息

适用于

其他资源