Xamarin Forms 显示数据网格

Question

我是 xamarin 表单的初学者，我必须以网格形式显示动态数据。我的数据有多个列和行，并不总是适合屏幕大小。所以我必须水平和垂直滚动。第一列是数据的描述，我称之为行标题。我的目标是在列“下方”和行标题“下方”移动/滚动数据。列和行标题必须始终可见。
也许有人有同样的问题/解决方案并指出我正确的方向？还是样品？

其他信息：
要更清楚。如果用户向左滚动数据区域，则列标题必须向左滚动。因为并非所有列都可以显示在屏幕上。与行标题相同。如果用户向下滚动数据区域，它必须向下滚动。
在 excel 中，该函数被命名为“冻结窗格”： 我丑陋的简报：

谢谢

Answer 1

您可以使用 Grid 作为根布局，使用 ScrollView 来显示数据。

当数据超出屏幕时，ScrollView 可以滚动。

<Grid.ColumnDefinitions>


        <ColumnDefinition Width="200" />
        <ColumnDefinition Width="200" />
        <ColumnDefinition Width="200" />
        <ColumnDefinition Width="200" />
        <ColumnDefinition Width="200" />

    </Grid.ColumnDefinitions>

<!--Columns-->
<Label Text="title0" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightPink" Grid.Row="0" Grid.Column="1" />
<Label Text="title1" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightBlue" Grid.Row="0" Grid.Column="2" />
<Label Text="title2" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightPink" Grid.Row="0" Grid.Column="3" />
<Label Text="title3" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightBlue" Grid.Row="0" Grid.Column="4" />


        <!--Row Header-->
<Label Text="title0" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightPink" Grid.Row="1" Grid.Column="0" />
<Label Text="title1" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightBlue" Grid.Row="2" Grid.Column="0" />
<Label Text="title2" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightPink" Grid.Row="3" Grid.Column="0" />
<Label Text="title3" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightBlue" Grid.Row="4" Grid.Column="0" />
<Label Text="title4" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightPink" Grid.Row="5" Grid.Column="0" />
<Label Text="title5" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightBlue" Grid.Row="6" Grid.Column="0" />
<Label Text="title6" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightPink" Grid.Row="7" Grid.Column="0" />
<Label Text="title7" HorizontalTextAlignment="Center" VerticalTextAlignment="Center" BackgroundColor="LightBlue" Grid.Row="8" Grid.Column="0" />


 <!--Data-->




</Grid>

</ScrollView>

Answer 2

如果您使用 xamarin.forms 同步融合数据网格 (SfDataGrid)，您有两个选项可以解决此问题：

1)-第一个使用 SfDataGrid 的Unbound Rows 和Unbound Columns 功能。

2)-第二次使用 SfDataGrid 的 Freeze Panes（也称为 Frozen Views）功能。

如果是我，我会选择第二个选项，即 Freeze Panes ，它的外观如下：

syncfusion 有一个免费的社区许可证，您可以使用，一旦您在那里开设一个免费帐户page，就可以生成社区许可证密钥。

一旦您有了密钥，请按照setup instructions 了解如何设置 SfDataGrid，SfDataGrid 只是一个小的 NuGet 包。

然后在您的 App 类构造器中将密钥作为 RegisterLicense 方法的参数。

public App()
{
    //Register Syncfusion license
    Syncfusion.Licensing.SyncfusionLicenseProvider.RegisterLicense("YOUR LICENSE KEY");

    InitializeComponent();

    MainPage = new App1.MainPage();
}

有关licensing的更多信息。

Answer 3

这适用于我在 Android 和 iOS 上。在 UWP 上滚动不流畅。但这对我来说并不重要：

<Grid BackgroundColor="Black">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="150" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="80" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Label HorizontalTextAlignment="Center" VerticalTextAlignment="Center" Text="Empty" Grid.Row="0" Grid.Column="0" />
<AbsoluteLayout Grid.Column="1"
Grid.Row="0"
VerticalOptions="FillAndExpand" >
<ScrollView x:Name="colScrollView"
Orientation="Horizontal"
VerticalScrollBarVisibility="Never"
HorizontalScrollBarVisibility="Never"
AbsoluteLayout.LayoutBounds="0,0,1,1"
AbsoluteLayout.LayoutFlags="All">
<Grid BackgroundColor="LightGoldenrodYellow">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100" />
<ColumnDefinition Width="100" />
<ColumnDefinition Width="100" />
<ColumnDefinition Width="100" />
<ColumnDefinition Width="100" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Label Text="Column" Grid.Row="0" Grid.Column="0" />
<Label Text="Column" Grid.Row="0" Grid.Column="1" />
<Label Text="Column" Grid.Row="0" Grid.Column="2" />
<Label Text="Column" Grid.Row="0" Grid.Column="3" />
<Label Text="Column" Grid.Row="0" Grid.Column="4" />
</Grid>
</ScrollView>
<BoxView AbsoluteLayout.LayoutBounds="0,0,1,1"
AbsoluteLayout.LayoutFlags="All"
BackgroundColor="Transparent"></BoxView>
</AbsoluteLayout>
<AbsoluteLayout Grid.Column="0"
Grid.Row="1"
VerticalOptions="FillAndExpand">
<ScrollView x:Name="rowScrollView"
Orientation="Vertical"
VerticalScrollBarVisibility="Never"
HorizontalScrollBarVisibility="Never"
AbsoluteLayout.LayoutBounds="0,0,1,1"
AbsoluteLayout.LayoutFlags="All">

<Grid BackgroundColor="LightBlue">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="100" />
<RowDefinition Height="100" />
<RowDefinition Height="100" />
<RowDefinition Height="100" />
<RowDefinition Height="100" />
</Grid.RowDefinitions>
<Label Text="Cell" Grid.Column="0" Grid.Row="0" />
<Label Text="Cell" Grid.Column="0" Grid.Row="1" />
<Label Text="Cell" Grid.Column="0" Grid.Row="2" />
<Label Text="Cell" Grid.Column="0" Grid.Row="3" />
<Label Text="Cell" Grid.Column="0" Grid.Row="4" />
</Grid>
</ScrollView>
<BoxView AbsoluteLayout.LayoutBounds="0,0,1,1"
AbsoluteLayout.LayoutFlags="All"
BackgroundColor="Transparent"></BoxView>
</AbsoluteLayout>
<AbsoluteLayout Grid.Column="1"
Grid.Row="1"
VerticalOptions="FillAndExpand">
<ScrollView x:Name="dataScrollView"
Orientation="Both"
AbsoluteLayout.LayoutBounds="0,0,1,1"
AbsoluteLayout.LayoutFlags="All">
<Grid BackgroundColor="LightGreen">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100" />
<ColumnDefinition Width="100" />
<ColumnDefinition Width="100" />
<ColumnDefinition Width="100" />
<ColumnDefinition Width="100" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="100" />
<RowDefinition Height="100" />
<RowDefinition Height="100" />
<RowDefinition Height="100" />
<RowDefinition Height="100" />
</Grid.RowDefinitions>
<Label Text="Cell" Grid.Column="0" Grid.Row="0" />
<Label Text="Cell" Grid.Column="0" Grid.Row="1" />
<Label Text="Cell" Grid.Column="0" Grid.Row="2" />
<Label Text="Cell" Grid.Column="0" Grid.Row="3" />
<Label Text="Cell" Grid.Column="0" Grid.Row="4" />

<Label Text="Cell" Grid.Column="1" Grid.Row="0" />
<Label Text="Cell" Grid.Column="1" Grid.Row="1" />
<Label Text="Cell" Grid.Column="1" Grid.Row="2" />
<Label Text="Cell" Grid.Column="1" Grid.Row="3" />
<Label Text="Cell" Grid.Column="1" Grid.Row="4" />

<Label Text="Cell" Grid.Column="2" Grid.Row="0" />
<Label Text="Cell" Grid.Column="2" Grid.Row="1" />
<Label Text="Cell" Grid.Column="2" Grid.Row="2" />
<Label Text="Cell" Grid.Column="2" Grid.Row="3" />
<Label Text="Cell" Grid.Column="2" Grid.Row="4" />

<Label Text="Cell" Grid.Column="3" Grid.Row="0" />
<Label Text="Cell" Grid.Column="3" Grid.Row="1" />
<Label Text="Cell" Grid.Column="3" Grid.Row="2" />
<Label Text="Cell" Grid.Column="3" Grid.Row="3" />
<Label Text="Cell" Grid.Column="3" Grid.Row="4" />

<Label Text="Cell" Grid.Column="4" Grid.Row="0" />
<Label Text="Cell" Grid.Column="4" Grid.Row="1" />
<Label Text="Cell" Grid.Column="4" Grid.Row="2" />
<Label Text="Cell" Grid.Column="4" Grid.Row="3" />
<Label Text="Cell" Grid.Column="4" Grid.Row="4" />
</Grid>
</ScrollView>
</AbsoluteLayout>
</Grid>

后面的代码：

public MyPage()
{
InitializeComponent();
dataScrollView.Scrolled += DataScrollView_Scrolled;
}

private async void DataScrollView_Scrolled(object sender, ScrolledEventArgs e)
{
await rowScrollView.ScrollToAsync(0, e.ScrollY, false);
await colScrollView.ScrollToAsync(e.ScrollX, 0, false);
}