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学习总结

2018-06-18 02:22:26来源：未知阅读 ()

最近在学习win10开发UWP应用的时候遇到了一些问提，记录以作备用。

1. listview可以通过ItemTemplateSelector来给listview显示不同的DataTemplate

一个继承DataTemplateSelector的类，通过重写SelectTemplateCore的方法来指定不同的DataTemplate

2.在DataTemplate里面使用x:bind的时候，必须在DataTemplate那里指定x:DataType,不然编译会报错

3.listview的FooterTemplate和DataTemplate的内容所属的集合不一致，

在赋值的时候,是这样赋值的

        //初始化数据，TemplateType=2的那一项是占位项，用来显示画线的那一项
        //SpView的那一项是listview的footitem的那一项
        public SpliteViewViewModel()
        {
            spHelper = new List<SpliteViewHelper>()
            {
               new SpliteViewHelper() {SpliteviewName="标题1",groupType=1,SpIcon=new BitmapImage(new Uri("ms-appx:///Assets/LockScreenLogo.scale-200.png")) ,TemplateType=1},
               new SpliteViewHelper() {SpliteviewName="标题2",groupType=1,SpIcon=new BitmapImage(new Uri("ms-appx:///Assets/LockScreenLogo.scale-200.png")),TemplateType=1},
               new SpliteViewHelper() {SpliteviewName="标题3",groupType=1,SpIcon=new BitmapImage(new Uri("ms-appx:///Assets/LockScreenLogo.scale-200.png")),TemplateType=1},
                new SpliteViewHelper() {SpliteviewName="标题1",groupType=1,SpIcon=new BitmapImage(new Uri("ms-appx:///Assets/LockScreenLogo.scale-200.png")),TemplateType=2},
               new SpliteViewHelper() {SpliteviewName="标题4",groupType=1,SpIcon=new BitmapImage(new Uri("ms-appx:///Assets/LockScreenLogo.scale-200.png")),TemplateType=1},
               new SpliteViewHelper() {SpliteviewName="标题5",groupType=1,SpIcon=new BitmapImage(new Uri("ms-appx:///Assets/LockScreenLogo.scale-200.png")),TemplateType=1},
            };
            SpView = new SpliteViewHelper() { SpliteviewName = "底部标题", groupType = 1, SpIcon = new BitmapImage(new Uri("ms-appx:///Assets/LockScreenLogo.scale-200.png")), TemplateType = 1 };
        }

View Code

在前台绑定也是不同的

<ListView x:Name="SplitViewListView" SelectedItem="{Binding spviewmodel.selectitem}" ItemsSource="{Binding spviewmodel.spHelper}" Background="#372127" >
                    <Interactivity:Interaction.Behaviors>
                        <core:EventTriggerBehavior EventName="SelectionChanged">
                            <core:InvokeCommandAction Command="{Binding spviewmodel.SelectedCommand}" CommandParameter="{Binding ElementName=SplitViewListView,Path=SelectedItem}"/>
                        </core:EventTriggerBehavior>
                    </Interactivity:Interaction.Behaviors>
                    <ListView.ItemTemplateSelector>
                        <com:TemplateSelector  LineTemplate="{StaticResource LineTemplate}" NomalTemplate="{StaticResource NomalTemplate}"/>
                    </ListView.ItemTemplateSelector>
                    <ListView.FooterTemplate>
                        <DataTemplate >
                            <StackPanel  Orientation="Horizontal" Height="40" x:Name="footItem">
                                <Interactivity:Interaction.Behaviors>
                                    <core:EventTriggerBehavior EventName="Tapped">
                                        <core:InvokeCommandAction Command="{Binding spviewmodel.SelectedCommand}" CommandParameter="{Binding ElementName=footItem}"/>
                                    </core:EventTriggerBehavior>
                                </Interactivity:Interaction.Behaviors>
                                <Image Source="{Binding spviewmodel.SpView.SpIcon}" Width="40" Height="40" VerticalAlignment="Center"/>
                                <TextBlock Text="{Binding spviewmodel.SpView.SpliteviewName}" Foreground="White"></TextBlock>
                            </StackPanel>
                        </DataTemplate>
                    </ListView.FooterTemplate>
                </ListView>