我想在ListView中安排我的项目,其中包含文本和图像,如下例所示:
那么,我如何制作一个自动列......或模拟它?
显然,这种布局的难点在于不同的元素的宽度取决于其他元素的宽度。
编辑:使用@ WPInfo的答案,我已尝试过这个:
XAML
<Page.DataContext>
<local:MainViewModel></local:MainViewModel>
</Page.DataContext>
<ListView ItemsSource="{Binding Items}">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<TextBlock Text="{Binding}" />
<Border Background="CornflowerBlue" Grid.Column="1" />
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
CODE:
public class MainViewModel
{
public IList<string> Items { get; }
public MainViewModel()
{
Items = new List<string>()
{
"ABC",
"ABCDEF",
"ABCDEFGHI",
};
}
}
预期结果是:
然而,实际结果是:
目标是第一列与其中最宽的元素一样宽。
在WPF中,使用Grid.SharedSizeGroup
可以轻松解决这个问题。在UWP中没有这样的事情。
答案 0 :(得分:0)
问题是ListView孩子对彼此一无所知。没有简单的技巧让所有项目都知道最长的文本项目是什么,因此需要更复杂的解决方案。以下作品。它将根据字符串列表中的最大项确定固定的TextBlock大小,如果字体大小发生更改,它将更新它。显然,如果您决定文本或图像的固定列大小,可以使用更接近您的示例代码的更简单的解决方案,但我认为您已经知道了。
XAML:
<Page.DataContext>
<local:MainViewModel></local:MainViewModel>
</Page.DataContext>
<ListView ItemsSource="{Binding Items}">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<TextBlock Text="{Binding MyText, Mode=OneWay}" FontSize="{Binding ItemFontSize, Mode=OneWay}" Width="{Binding TextWidth, Mode=OneWay}" />
<Border Background="CornflowerBlue" Grid.Column="1" />
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
C#ViewModel
public class MainViewModel : INotifyPropertyChanged
{
public ObservableCollection<MyListViewItemsClass> Items { get; set; }
private List<string> ItemsFromModel;
private int _myFontSize;
public int MyFontSize
{
get { return _myFontSize; }
set
{
if (value != _myFontSize)
{
_myFontSize = value;
OnPropertyChanged("MyFontSize");
// Font size changed, need to refresh ListView items
LoadRefreshMyListViewItems();
}
}
}
public MainViewModel()
{
// set default font size
_myFontSize = 20;
// example data
ItemsFromModel = new List<string>()
{
"ABC",
"ABCDEF",
"ABCDEFGHI",
};
LoadRefreshMyListViewItems();
}
public void LoadRefreshMyListViewItems()
{
int itemMaxTextLength = 0;
foreach (var modelItem in ItemsFromModel)
{
if (modelItem.Length > itemMaxTextLength) { itemMaxTextLength = modelItem.Length; }
}
Items = new ObservableCollection<MyListViewItemsClass>();
// Convert points to pixels, multiply by max character length to determine fixed textblock width
// This assumes 96 DPI. Search for how to grab system DPI in C# there are answers on SO.
double width = MyFontSize * 0.75 * itemMaxTextLength;
foreach (var itemFromModel in ItemsFromModel)
{
var item = new MyListViewItemsClass();
item.MyText = itemFromModel;
item.ItemFontSize = MyFontSize;
item.TextWidth = width;
Items.Add(item);
}
OnPropertyChanged("Items");
}
public class MyListViewItemsClass
{
public string MyText { get; set; }
public int ItemFontSize { get; set; }
public double TextWidth { get; set; }
}
protected void OnPropertyChanged(PropertyChangedEventArgs e)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
handler(this, e);
}
public void OnPropertyChanged(string propertyName)
{
OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
}
public event PropertyChangedEventHandler PropertyChanged;
}
答案 1 :(得分:-1)
尝试为ListView设置ItemContainerStyle
属性:
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
然后你的ListView可能如下所示:
<ListView x:Name="list">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<TextBlock ... />
<Image Grid.Column="1" HorizontalAlignment="Right" ... />
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
之后,您可以为ListView的HorizontalAlignment
属性设置正确的值。