限制 GridView C# UWP 中的项目数

Question

我使用绑定到集合的网格视图。该集合包含未知数量的项目，我想限制 GridView 在一行中仅显示 5 个项目。每个项目都保存在一个包含文本块和图像的堆栈面板中。

一个。如何限制 GridView 的项目数？ B. 如果我不想限制它，我怎样才能制作一个 1 行的 gridview，用一个小箭头将网格滚动到一边？

这是我的 xaml 代码：

 <GridView Name="ListViewGrid" Background="Azure" 
              Grid.Row="2" 
              ItemsSource="{x:Bind ForeCasts}" 
              Foreground="Chartreuse" 
              HorizontalAlignment="Stretch" >
        <GridView.ItemTemplate>
            <DataTemplate x:DataType="data:ForeCast">
                <StackPanel Orientation="Vertical" Margin="20,20,20,20" Height="260" Width="260">
                    <TextBlock HorizontalAlignment="Center" Margin="10,10,10,10">
                        <Run Text="{x:Bind TempString}" FontSize="24" Foreground="Black"/>
                        <Run Text="&#x00B0;" FontFamily="Segoe Print" FontSize="24"/>
                        <Run Text="C" FontSize="24"/>
                    </TextBlock>
                    <Image Source="{x:Bind ImageString}" Width="60" Height="60"/>
                </StackPanel>
            </DataTemplate>
        </GridView.ItemTemplate>
    </GridView>

Answer 1

The collection is holding an unknown number of items and I want to limit the GridView to show only 5 items in one row.

GridView uses ItemsWrapGrid as the default ItemsPanel. And ItemsWrapGrid has a MaximumRowsOrColumns property. With this property we can limit the maximum rows or columns that will present before wrapping. This property works with Orientation属性。要在一行中只显示 5 个项目，我们可以这样设置：

<GridView.ItemsPanel>
    <ItemsPanelTemplate>
        <ItemsWrapGrid MaximumRowsOrColumns="5" Orientation="Horizontal" />
    </ItemsPanelTemplate>
</GridView.ItemsPanel>

请注意，MaximumRowsOrColumns 仅限制最大数量，如果 GridView 不够大，您可能会看到较少的项目。

If I don't want to limit it how can I make a gridview of 1 row which with a little arrow scroll the grid to the side?

要显示水平堆叠的集合，我们通常使用 ListView. If you do want to use GridView, you can using ItemsStackPanel 而不是 ItemsWrapGrid，如下所示：

<GridView.ItemsPanel>
    <ItemsPanelTemplate>
        <ItemsStackPanel Orientation="Horizontal" />
    </ItemsPanelTemplate>
</GridView.ItemsPanel>

要启用滚动，您可能还需要设置 ScrollViewer.HorizontalScrollBarVisibility property and ScrollViewer.HorizontalScrollMode 属性，如下所示：

<GridView Name="ListViewGrid"
          Grid.Row="2"
          HorizontalAlignment="Stretch"
          Background="Azure"
          Foreground="Chartreuse"
          ItemsSource="{x:Bind ForeCasts}"
          ScrollViewer.HorizontalScrollBarVisibility="Visible"
          ScrollViewer.HorizontalScrollMode="Enabled">
    <GridView.ItemTemplate>
        <DataTemplate x:DataType="data:ForeCast">
            <StackPanel Width="260"
                        Height="260"
                        Margin="20,20,20,20"
                        Orientation="Vertical">
                <TextBlock Margin="10,10,10,10" HorizontalAlignment="Center">
                    <Run FontSize="24" Foreground="Black" Text="{x:Bind TempString}" />
                    <Run FontFamily="Segoe Print" FontSize="24" Text="&#x00B0;" />
                    <Run FontSize="24" Text="C" />
                </TextBlock>
                <Image Width="60" Height="60" Source="{x:Bind ImageString}" />
            </StackPanel>
        </DataTemplate>
    </GridView.ItemTemplate>
    <GridView.ItemsPanel>
        <ItemsPanelTemplate>
            <ItemsStackPanel Orientation="Horizontal" />
        </ItemsPanelTemplate>
    </GridView.ItemsPanel>
</GridView>

限制 GridView C# UWP 中的项目数

Limiting number of items in a GridView C# UWP

c#

gridview

uwp

uwp-xaml