Question

我有3个区域，即菜单，工具栏和内容。当在菜单视图中单击模块（即客户）时，在编辑我需要将其保存到DB的文本框中的值之后，它将导航到内容区域中的相应视图。如何在工具栏视图中单击保存按钮时获取活动视图的底层视图模型并发送到DAL？ Shell.xaml：

<Grid DockPanel.Dock="Left" Width="65" Margin="1">
        <Border CornerRadius="1" BorderBrush="Black" BorderThickness="1">
            <StackPanel Orientation="Vertical" Margin="1" >
                <ContentControl Name="menuControl" PrismRegions:RegionManager.RegionName="{x:Static infra:RegionNames.MenuRegion}"/>
            </StackPanel>
        </Border>
    </Grid>
    <Grid DockPanel.Dock="Top" Margin="1">
        <Border CornerRadius="1" BorderBrush="Black" BorderThickness="1" >
            <StackPanel Orientation="Vertical" Margin="2">
                <ContentControl Name="toolbarControl" PrismRegions:RegionManager.RegionName="{x:Static infra:RegionNames.ToolbarRegion}"/>
            </StackPanel>
        </Border>
    </Grid>
    <Grid DockPanel.Dock="Right" Margin="2">
        <Border CornerRadius="1" BorderBrush="Black" BorderThickness="1">
    <StackPanel Margin="5" >
            <ContentControl Name="contentControl"  DockPanel.Dock="Top" PrismRegions:RegionManager.RegionName="{x:Static infra:RegionNames.ContentRegion}"/>
    </StackPanel>
        </Border>
    </Grid>

Menu.xaml：

<Button Grid.Row="0" Name="btnHome" Background="Transparent" Margin="1" ToolTip="Home" Command="{x:Static inf:ApplicationCommands.NavigationCommand}" CommandParameter="{x:Type mod:HomeView}">
        <TextBlock Height="32" Width="32" Text ="">
            <TextBlock.Background>
                <ImageBrush Stretch="Fill" ImageSource="/Modules;component/Icons/home_32.png"/>
            </TextBlock.Background>
        </TextBlock>
    </Button>
    <Button Grid.Row="1" Name="btnBank" Background="Transparent" Margin="1" ToolTip="Bank" Command="{x:Static inf:ApplicationCommands.NavigationCommand}" CommandParameter="{x:Type mod:BankView}">
        <TextBlock Height="32" Width="32" Text ="">
            <TextBlock.Background>
                <ImageBrush Stretch="Fill" ImageSource="/Modules;component/Icons/bank_64.png"/>
            </TextBlock.Background>
        </TextBlock>
    </Button>
    <Button Grid.Row="2" Name="btnCustomer" Background="Transparent" Margin="1" ToolTip="Customer" Command="{x:Static inf:ApplicationCommands.NavigationCommand}" CommandParameter="{x:Type mod:CustomerView}">
    <TextBlock Height="32" Width="32" Text ="">
        <TextBlock.Background>
                <ImageBrush Stretch="Fill" ImageSource="/Modules;component/Icons/customer_128.ico"/>
        </TextBlock.Background>
    </TextBlock>
    </Button>
    <Button Grid.Row="3" Name="btnEmployee" Background="Transparent" Margin="1" ToolTip="Employee" Command="{x:Static inf:ApplicationCommands.NavigationCommand}" CommandParameter="{x:Type mod:EmployeeView}">
    <TextBlock Height="32" Width="32" Text ="">
        <TextBlock.Background>
                <ImageBrush Stretch="Fill" ImageSource="/Modules;component/Icons/employee_128.png"/>
        </TextBlock.Background>
    </TextBlock>
    </Button>

Toolbar.xaml：

<Button Grid.Column="0" Margin="1" Name="btnAdd" Height="35" Width="35"  ToolTip="Add" Background="Transparent" Command="{Binding AddCommand}" CommandParameter="Add" >
            <TextBlock Height="30" Width="30" Text ="">
                <TextBlock.Background>
                <ImageBrush Stretch="Fill" ImageSource="/Modules;component/Icons/plus_32.png"/>
                </TextBlock.Background>
            </TextBlock>
        </Button>
    <Button Grid.Column="1" Margin="1" Name="btnEdit" Height="35" Width="35" ToolTip="Edit" Background="Transparent" Command="{Binding EditCommand}" CommandParameter="Edit"  >
            <TextBlock Height="30" Width="30" Text ="">
                <TextBlock.Background>
                    <ImageBrush Stretch="Fill" ImageSource="/Modules;component/Icons/pencil_32.png"/>
                </TextBlock.Background>
            </TextBlock>
        </Button>
    <Button Grid.Column="2" Margin="1" Name="btnSave" Height="35" Width="35" ToolTip="Save" Background="Transparent" Command="{Binding SaveCommand}" CommandParameter="Save" >
            <TextBlock Height="30" Width="30" Text ="">
                <TextBlock.Background>
                    <ImageBrush Stretch="Fill" ImageSource="/Modules;component/Icons/save_32.png"/>
                </TextBlock.Background>
            </TextBlock>
        </Button>
    <Button Grid.Column="3" Margin="1" Name="btnPrint" Height="35" Width="35" ToolTip="Print" Background="Transparent" Command="{Binding PrintCommand}" CommandParameter="Print" >
            <TextBlock Height="30" Width="30" Text ="">
                <TextBlock.Background>
                    <ImageBrush Stretch="Fill" ImageSource="/Modules;component/Icons/print_32.png"/>
                </TextBlock.Background>
            </TextBlock>
        </Button>

UI设计：

Attached the Image

Answer 1

基本上，您的视图状态完全出现在viewmodel中。在你的Button出场的情况下，表单的viewmodel保存你可以做的是：

在工具栏视图模型中：提出单击“保存”按钮的事件

myEventAggregator.RaiseEvent<SaveButtonClicked>().Publish(args);

在viewmodel构造函数上：订阅当您单击工具栏区域中的“保存”按钮时引发的事件

myEventAggregator.GetEvent<SaveButtonClicked>().Subscribe(yourSubscriberDelegate);

退出表格或取消表格：取消订阅该活动。（这可确保您没有多个活动表单同时保存数据）

myEventAggregator.GetEvent<SaveButtonClicked>().UnSubscribe(yourSubscriberDelegate);

为此，您需要事件聚合器了解发布和订阅。查找更多详情here

如何从WPF Prism中的另一个视图获取视图/区域的基础视图模型

1 个答案: