Wpf 动态添加的图元未在动态调整的网格中正确显示
我有一个ItemsControl,它应该在网格中显示图像 ItemsControl如下所示:Wpf 动态添加的图元未在动态调整的网格中正确显示,wpf,dynamically-generated,wpf-grid,Wpf,Dynamically Generated,Wpf Grid,我有一个ItemsControl,它应该在网格中显示图像 ItemsControl如下所示: <ItemsControl x:Name="ICGridThumbnails"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <Grid ShowGridLines="True" Name="GThumbnails" Loaded="GThumbnails_Load
<ItemsControl x:Name="ICGridThumbnails">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Grid ShowGridLines="True" Name="GThumbnails" Loaded="GThumbnails_Loaded" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Image Grid.Row="{Binding GridRow}" Grid.Column="{Binding GridColumn}" Margin="{Binding Margin}" RenderOptions.BitmapScalingMode="NearestNeighbor" RenderOptions.EdgeMode="Aliased" Source="{Binding BitmapSource}"></Image>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
项是具有GridColumn、GridRow和BitmapSource属性的对象
在计算所有这些对象并将数组设置为ItemsSource之后,我将计算行数和列数:
private void GThumbnails_Loaded(Object sender, RoutedEventArgs e) {
_GThumbnails = (Grid)sender;
RearrangeThumbnailGrid();
}
private void RearrangeThumbnailGrid() {
int countPerRow = (int)Math.Floor(Application.Current.MainWindow.ActualWidth / ThumbnailBar.ThumbnailWidthLarge);
_GThumbnails.ColumnDefinitions.Clear();
_GThumbnails.RowDefinitions.Clear();
// Columns
for (int i = 0; i < countPerRow; ++i) {
ColumnDefinition cd = new ColumnDefinition();
cd.Width = new GridLength(141);
_GThumbnails.ColumnDefinitions.Add(cd);
}
// Rows
for (int i = 0; i < (Thumbs.LargeThumbnails.Length / countPerRow) + 1; ++i) {
RowDefinition rd = new RowDefinition();
rd.Height = new GridLength(200);
_GThumbnails.RowDefinitions.Add(rd);
}
}
正如我的屏幕截图所示,所有项目都加载到VisualTree中,并且它们具有正确的列和行值。此外,网格将正确显示。BitmapSource属性似乎工作正常,因为在我的屏幕截图上可以看到白色背景上的图像
唯一的问题是,所有项目似乎都显示在左上角的第一个单元格中。也可能忽略行和列的值。
我尝试使用来自的建议,但不起作用。设置ItemContainer的Grid.Row和Grid.Column附加属性:
<ItemsControl x:Name="ICGridThumbnails">
<ItemsControl.ItemContainerStyle>
<Style TargetType="ContentPresenter">
<Setter Property="Grid.Row" Value="{Binding GridRow}" />
<Setter Property="Grid.Column" Value="{Binding GridColumn}" />
</Style>
</ItemsControl.ItemContainerStyle>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Grid ShowGridLines="True" Name="GThumbnails" Loaded="GThumbnails_Loaded" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Image Margin="{Binding Margin}" RenderOptions.BitmapScalingMode="NearestNeighbor" RenderOptions.EdgeMode="Aliased" Source="{Binding BitmapSource}"></Image>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
实际问题是DataTemplate中的映像不是网格的直接子级。这就是为什么必须在ItemContainer上设置属性的原因。是的,我从mm8s的回答中理解了这一点,也谢谢!您还可以绑定行数和列数,如中所示。非常好用,谢谢!
<ItemsControl x:Name="ICGridThumbnails">
<ItemsControl.ItemContainerStyle>
<Style TargetType="ContentPresenter">
<Setter Property="Grid.Row" Value="{Binding GridRow}" />
<Setter Property="Grid.Column" Value="{Binding GridColumn}" />
</Style>
</ItemsControl.ItemContainerStyle>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Grid ShowGridLines="True" Name="GThumbnails" Loaded="GThumbnails_Loaded" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Image Margin="{Binding Margin}" RenderOptions.BitmapScalingMode="NearestNeighbor" RenderOptions.EdgeMode="Aliased" Source="{Binding BitmapSource}"></Image>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>