Mvvm绑定datagrid或listview的selectItems的方法

单选，很简单，将SelectedItem与ViewModel的属性进行双向绑定就OK了

多选，由于ListView的SelectedItems不能进行绑定，需要将ListView的SelectionChanged事件转换成命令绑定到ViewModel，同时将SelectedItems传递到ViewModel层

示例：
首先添加程序集引用System.Windows.Interactivity.dll

xaml
添加命名空间引用

HTML code

<UserControl ... xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" />

 

HTML code

<ListView ItemsSource="{Binding Source={StaticResource CustomerGroups}}" x:Name="dataGrid1" > <ListView.GroupStyle> <StaticResourceExtension ResourceKey="CustomerGroupStyle" /> </ListView.GroupStyle> <ListView.View> <GridView> <GridView.Columns> <GridViewColumn DisplayMemberBinding="{Binding DisplayName,Mode=OneWay}" Header="Name" /> <GridViewColumn DisplayMemberBinding="{Binding Email,Mode=OneWay}" Header="E-Mail" /> <GridViewColumn DisplayMemberBinding="{Binding TotalSales,Mode=OneWay, ConverterCulture=zh-CN, StringFormat=c}" Header="Total Sales" /> </GridView.Columns> </GridView> </ListView.View> <i:Interaction.Triggers> <i:EventTrigger EventName="SelectionChanged"> <i:InvokeCommandAction Command="{Binding SelectionChangeCommand}" CommandParameter="{Binding SelectedItems,ElementName=dataGrid1}"/> </i:EventTrigger> </i:Interaction.Triggers> </ListView>

viewmodel：

C# code

        public RelayCommand<IList> SelectionChangeCommand

        {

            get

            {

                return new RelayCommand<IList>

                    (

                        (selectedItems) =>

                        {

                            TotalSelectedSales = 0;



                            CustomerViewModel firstCustomer = null;



                            if (selectedItems.Count > 0)

                                firstCustomer = selectedItems[0] as CustomerViewModel;



                            // 将选中第一条CustomerViewModel传递到主页面

                            selectedCustomer = firstCustomer;



                            // 更新按钮的可执行状态

                            EditCustomerCommand.RaiseCanExecuteChanged();

                            DeleteCustomerCommand.RaiseCanExecuteChanged();



                            foreach (dynamic Item in selectedItems)

                                TotalSelectedSales += Item.TotalSales;



                            RaisePropertyChanged("TotalSelectedSales");

                        }

                    );

            }

        }