Xamarin.Forms ListView 大小到内容 [英] Xamarin.Forms ListView size to content
问题描述
我有一个非常大的表单(主要适用于平板电脑)，它有一个 GridView 嵌套了两个 stacklayouts 和 listview
I have a pretty large form (adapted mainly for tablets), that has a GridView nesting a two stacklayouts and listview
我很少有一个 ListView 包含几个单行项目的情况，我需要将它调整到内容大小.
I have few occurrences where I have a ListView that contains a few single-line items, and I need it to size to content.
这是我的源代码
<Grid Grid.Row="2" Grid.ColumnSpan="2" HorizontalOptions="FillAndExpand" x:Name="OrderPricingDetails">
<Grid.RowDefinitions>
<RowDefinition Height="90"/>
<RowDefinition Height="auto" x:Name="OrderPricingDetailsListRow"/>
<RowDefinition Height="90"/>
</Grid.RowDefinitions>
<StackLayout Grid.Row="0" Orientation="Vertical" Margin="10" Padding="10" x:Name="PackageSelectionSection" >
<Label Text="Order Pricing" FontAttributes="Bold" TextColor="Black" />
<Label Text="Listing details for this specific order" FontSize="Small" TextColor="#757575" />
<Frame CornerRadius="5" BackgroundColor="Transparent" HeightRequest="270" BorderColor="#c3c3c3" Padding="10,10,5,10" Margin="0,20,0,0">
<StackLayout>
<FlexLayout JustifyContent="SpaceBetween" HorizontalOptions="FillAndExpand" Direction="Row" AlignItems="Center" x:Name="SelectedPackageSection">
<StackLayout Orientation="Horizontal">
<Label Text="Selected Package " FontSize="Medium" />
</StackLayout>
<Label Text="ALA_CARTE_300" x:Name="selectedOfrferDesc" TextColor="#757575" FontAttributes="Bold" FontSize="Small" Grid.Column="1" Grid.ColumnSpan="2"/>
<Label Text="for" FontSize="Medium" />
<Label Text="LCD" x:Name="selectedOfferPrice" TextColor="#757575" FontAttributes="Bold" FontSize="Small" Margin="0,0,20,0" />
</FlexLayout>
</StackLayout>
</Frame>
</StackLayout>
<StackLayout Grid.Row="1" Orientation="Vertical" Margin="10" Padding="10" x:Name="ConnectionfeeSection" HorizontalOptions="FillAndExpand">
<ListView x:Name="OfferList" HasUnevenRows="True" VerticalOptions="Center" Margin="0,10,0,0" SelectionMode="None">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<Frame CornerRadius="5" OutlineColor="#c3c3c3" Padding="5,10,5,5" Margin="0,10,0,0" BackgroundColor="Transparent">
<StackLayout Orientation="Horizontal" Padding="5" BackgroundColor="Transparent" VerticalOptions="Center" >
<FlexLayout JustifyContent="SpaceBetween" HorizontalOptions="FillAndExpand" Direction="Row" AlignItems="Center" x:Name="SelectedConnectionfeeSection">
<StackLayout Orientation="Horizontal">
<Label Text="{Binding DisplayName}" FontSize="Medium" />
</StackLayout>
<Label Text="{Binding Amount}" x:Name="selectedConnectionfee" TextColor="#757575" FontAttributes="Bold" FontSize="Small" Margin="0,0,20,0" />
</FlexLayout>
</StackLayout>
</Frame>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackLayout>
<StackLayout Grid.Row="2" Orientation="Vertical" Margin="10" Padding="10" x:Name="ConnectionTotalSection" >
<Frame CornerRadius="5" BackgroundColor="Transparent" BorderColor="#c3c3c3" Padding="20,10,5,10" Margin="0,10,0,0">
<StackLayout>
<FlexLayout JustifyContent="SpaceBetween" HorizontalOptions="FillAndExpand" Direction="Row" AlignItems="Center" x:Name="SelectedConnectionTotalSection">
<StackLayout Orientation="Horizontal">
<Label Text="Total " FontSize="Medium" />
</StackLayout>
<Label Text="{Binding Total, StringFormat='{0:N}'}" x:Name="selectedConnectionTotal" TextColor="#757575" FontAttributes="Bold" FontSize="Small" Margin="0,0,20,0" />
</FlexLayout>
</StackLayout>
</Frame>
</StackLayout>
</Grid>
这是我背后的代码.
OrderPricingDetailsListRow.Height = 280;
OfferList.ItemsSource = connectionsNames;
int i = connectionsNames.Count;
int heightRowList = 90;
i = (i * heightRowList);
OfferList.HeightRequest = i;
我只是想消除列表视图和堆栈布局之间的差距
Simply I want to remove that gap between listview and stack layout
推荐答案
而不是使用 ListView 控件.只需使用 Stacklayout 并向其添加 BindableLayout 即可.它基本上将 Stacklayout 变成了一个 ListView 但没有滚动.
Instead of using a ListView control. Just use a Stacklayout and add a BindableLayout to it. It basically turns the Stacklayout into a ListView but without the scrolling.
<StackLayout x:Name="OfferList" BindableLayout.ItemsSource="{Binding ConnectionNames}">
<BindableLayout.ItemTemplate>
<DataTemplate>
<Frame CornerRadius="5" OutlineColor="#c3c3c3" Padding="5,10,5,5" Margin="0,10,0,0" BackgroundColor="Transparent">
<StackLayout Orientation="Horizontal" Padding="5" BackgroundColor="Transparent" VerticalOptions="Center" >
<FlexLayout JustifyContent="SpaceBetween" HorizontalOptions="FillAndExpand" Direction="Row" AlignItems="Center" x:Name="SelectedConnectionfeeSection">
<StackLayout Orientation="Horizontal">
<Label Text="{Binding DisplayName}" FontSize="Medium" />
</StackLayout>
<Label Text="{Binding Amount}" x:Name="selectedConnectionfee" TextColor="#757575" FontAttributes="Bold" FontSize="Small" Margin="0,0,20,0" />
</FlexLayout>
</StackLayout>
</Frame>
</DataTemplate>
</BindableLayout.ItemTemplate>
</StackLayout>
或者你也可以用 C# 代码来做，因为我注意到你没有绑定你的 ListView
Or you can do it in C# code too since I noticed you are not binding your ListView
DataTemplate useItemTemplate = null;
BindableLayout.SetItemTemplate(usersPanel, userItemTemplate);
这里有一个关于此功能的不错的博客.https://devblogs.microsoft.com/xamarin/xamarin-forms-3-5-a-little-bindable-love/
There is a pretty good blog on this feature here. https://devblogs.microsoft.com/xamarin/xamarin-forms-3-5-a-little-bindable-love/
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