我在绑定方面有一些问题。我不知道怎么做。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using GalaSoft.MvvmLight;
using ManyViews.Model;
using System.Collections.ObjectModel;
using System.Windows.Input;
using GalaSoft.MvvmLight.Command;

namespace ManyViews.ViewModel
{
    class ListViewModel : ViewModelBase
    {
        public void show()
        {
            System.Windows.MessageBox.Show("Raise");
        }
        public ListViewModel()
        {
            EventChecked = new RelayCommand(() => show());
        }
        public ICommand EventChecked { get; set; }
        public ObservableCollection<ListStruct> ShowList
        {
            get { return ListM.Items; }
            set { ListM.Items = value; RaisePropertyChanged("ShowList"); }
        }
        ListModel ListM = new ListModel();
    }
}


如果需要选择其他上下文,我总是使用静态资源,但是在这种情况下,EventTrigger中没有属性数据上下文。

<UserControl x:Class="ManyViews.View.List"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
         xmlns:test="clr-namespace:ManyViews.ViewModel"
         mc:Ignorable="d"
         d:DesignHeight="300" d:DesignWidth="300">
<UserControl.Resources>
    <test:ListViewModel x:Key="Test"></test:ListViewModel>
</UserControl.Resources>
<Grid>
    <ListView ItemsSource="{Binding ShowList}">
        <ListView.ItemTemplate>
            <DataTemplate>
                <CheckBox Content="{Binding name}">
                    <i:Interaction.Triggers >
                        <i:EventTrigger EventName="Checked">
                            <i:InvokeCommandAction  Command="{Binding DataContext.EventChecked, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type test:ListViewModel}}}"></i:InvokeCommandAction>
                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                </CheckBox>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>
</Grid>




在这种情况下我有错误


  “ System.Windows.Data错误:4:找不到绑定源
  参考'RelativeSource FindAncestor,
  AncestorType ='ManyViews.ViewModel.ListViewModel',AncestorLevel ='1''。
  BindingExpression:Path = DataContext.EventChecked; DataItem = null;目标
  元素是'InvokeCommandAction'(HashCode = 43550996);目标物业
  是“命令”(类型为“ ICommand”)”

最佳答案

AncestorType={x:Type test:ListViewModel}是您的问题。

视觉树中没有test:ListViewModel高于当前项目。只有不同的控件,没有(视图)模型。

对其进行更改以搜索ListView

<i:InvokeCommandAction
     Command="{Binding DataContext.EventChecked, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type ListView}}}">
</i:InvokeCommandAction>

09-07 00:17