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我有一个ItemsControl应该显示Images在Grid.

ItemsControl如下所示：

<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>

由于我想将可变数量的元素加载到网格中，因此我无法在标记中定义行和列。

BindingsGridRow和GridColumn在后面的代码中计算：

int countPerRow = (int)Math.Floor(Application.Current.MainWindow.ActualWidth / ThumbnailBar.ThumbnailWidthLarge);

double marginWidth = (Application.Current.MainWindow.ActualWidth - (countPerRow * ThumbnailBar.ThumbnailWidthLarge)) / (countPerRow - 1);

if (page % countPerRow == 0) {
    item.Margin = new Thickness(0, 10, 0, 0);
} else {
    item.Margin = new Thickness(marginWidth, 10, 0, 0);
}

item.GridRow = (int)Math.Floor((double)((page - 1) / countPerRow));
item.GridColumn = (page % countPerRow) - 1;

Thumbs.LargeThumbnails[page] = item;
ICGridThumbnails.ItemsSource = null;
ICGridThumbnails.ItemsSource = Thumbs.LargeThumbnails;

item是一个具有属性GridColumn和GridRow的对象BitmapSource。

在计算完所有这些对象并将数组设置为之后，ItemsSource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);
    }
}

从我的屏幕截图中可以看出，所有项目都加载到 VisualTree 中，并且它们具有正确的Column和Row值。网格也将正确显示。该BitmapSource属性似乎工作正常，因为可以Image在我的屏幕截图上看到一个（白色背景上的 35）。

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。也有可能忽略 Row和的值。Column在此处输入图像描述

我尝试使用此处的建议，但这不起作用。

4

1 回答 1

1

设置ItemContainer 的属性Grid.Row和附加属性：Grid.Column

<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>
于 2018-06-04T14:04:53.300 回答