我如何从ViewModel类的ListView中获取所有选定的项目? [英] How can i get all selected item(s) from ListView in ViewModel class?

问题描述

我使用Caliburn.Micro库用MVVM(C#)和XAML编写了一个程序，如何从ListView控件中获得所有选定项(不仅是一项)?

I wrote a program with MVVM (C#) and XAML using Caliburn.Micro library, how can I get all selected items from ListView control (not only one item)?

使用绑定方法SelectedItem="{Binding SelectedItem}"刚获得第一个选定项！

With binding method SelectedItem="{Binding SelectedItem}" just got first selected item!

推荐答案

要将选定的项放入ViewModel中，请首先在模型中创建一个bool类型的属性，该属性将与ListViewItem的IsSelected属性绑定

To get selected items into the ViewModel, first create a property of bool type in your model that will be bound with IsSelected property of ListViewItem.

模型类的属性:

 public bool IsSelected
    {
        get { return isSelected; }
        set 
        { 
            isSelected = value;
            RaiseChange("IsSelected");
        }
    }

XAML样式:

 <ListView.ItemContainerStyle>
        <Style TargetType="ListViewItem">
            <Setter Property="IsSelected" Value="{Binding IsSelected}" />
        </Style>
    </ListView.ItemContainerStyle>
</ListView>

ViewModel中的最终属性:

 public List<DataGridItem> SelectedItem
    {
        get
        {
            return list.Where(item=>item.IsSelected).ToList();
        }
    }

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