Pager.xaml(查看)我不能让自定义控件的所选项目
<Grid xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="Client.View.Pager">
...
<ListBox x:Name="listBoxEntries"
ItemsSource="{Binding Path=ListCollectionView}"
BorderThickness="0"
Margin="0"
Style="{StaticResource common}"
HorizontalContentAlignment="Stretch"
VerticalContentAlignment="Stretch"
ItemTemplate="{StaticResource templateTableCategory}"
SelectedItem="{Binding Path=SelectedEntry, Mode=TwoWay}">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid Rows="{Binding Path=Rows}"
Columns="{Binding Path=Columns}"
IsItemsHost="True"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
...
</Grid>
Pager.xaml.cs(代码隐藏)
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using Client.Model;
using Client.ViewModel;
namespace Client.View
{
public partial class Pager
{
public static readonly DependencyProperty SelectedEntryProperty = DependencyProperty.Register("SelectedEntry", typeof(IPagableEntry), typeof(Pager));
...
public IPagableEntry SelectedEntry
{
get { return (DataContext as PagerViewModel).SelectedEntry; }
set { (DataContext as PagerViewModel).SelectedEntry = value; }
}
...
}
}
PagerViewModel.cs
namespace Client.ViewModel
{
public class PagerViewModel : ViewModelBase
{
...
IPagableEntry _selectedEntry;
public IPagableEntry SelectedEntry
{
get
{
return _selectedEntry;
}
set
{
_selectedEntry = value;
OnPropertyChanged("SelectedEntry");
}
}
...
}
}
MainPage.xaml(查看)
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Class="Client.View.MainPage"
Style="{StaticResource common}">
<Page.DataContext>
<viewModel:MainPageViewModel/>
</Page.DataContext>
...
<view:Pager x:Name="pagerTableCategories"
Grid.Row="0"
List="{Binding Path=PagerTableCategoriesItems}"
Rows="{Binding Path=PagerTableCategoriesRows}"
Columns="{Binding Path=PagerTableCategoriesColumns}"
SelectedEntry="{Binding Path=SelectedTableCategory, Mode=TwoWay}">
</view:Pager>
...
</Page>
个
MainPageViewModel.cs
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;
using Client.Model;
namespace Client.ViewModel
{
public class MainPageViewModel : ViewModelBase
{
...
IPagableEntry _selectedTableCategory;
public IPagableEntry SelectedTableCategory
{
get
{
return _selectedTableCategory;
}
set
{
_selectedTableCategory = value;
MessageBox.Show("Got it!");
}
}
...
}
}
我做了一个自定义面板 '寻呼机',这就是视图模型。 ,我想在我的MainPage中显示寻呼机。 我期望我选择一个项目,然后MainPageViewModel的属性SelectTableCategory将会改变,并且一个消息框显示为字符串“Got it!” 但它不起作用... 我的问题是什么?
ps。我不擅长英语。 我希望你的理解。
您的'SelectedEntry'属性应该知道关于您的View Model的** nothing **。因此,使用'DataContext'通过依赖项属性返回视图模型中的属性当然不是实现此目的的最佳方法。自定义依赖项属性不需要依赖作为特定视图模型类型的'DataContext'。 **编辑**标准的依赖属性应该可以解决这个问题。只需输入'propdp' - > Tab - > Tab,Visual Studio会为您提供一个。 –