获取包含 Block 对象的 BlockCollection 对象

Question

获取包含给定块类型对象的 BlockCollection 对象（System.Windows.Documents 命名空间）的最简单（可能也更快）的方法是什么？

我找不到使用 Block 类上可用的任何直接方法来执行此操作。

public static BlockCollection FindContainingCollection(Block block)
{
   // ???        
}

Answer 1

因为我发布这篇文章已经一个月了，但没有得到答复，我将发布我最终做了什么。我这样写是相当愚蠢的，但我找不到任何更干净的方法来实现它，主要是因为 Blocks 属性不是通过公共接口公开的。

    public BlockCollection FindContainingCollection(Block block)
    {
        BlockCollection blocks = null;

        FlowDocument flowDoc = block.Parent as FlowDocument;

        if (flowDoc != null)
            blocks = flowDoc.Blocks;
        else
        {
            TableCell tableCell = block.Parent as TableCell;
            if (tableCell != null)
                blocks = tableCell.Blocks;
            else
            {
                ListItem listItem = block.Parent as ListItem;
                if (listItem != null)
                    blocks = listItem.Blocks;
                else
                {
                    Section section = block.Parent as Section;
                    if (section != null)
                        blocks = section.Blocks;
                    else
                    {
                        Figure figure = block.Parent as Figure;
                        if (figure != null)
                            blocks = figure.Blocks;
                        else
                        {
                            Floater floater = block.Parent as Floater;
                            if (floater != null)
                                blocks = floater.Blocks;
                        }
                    }
                }
            }
        }

        return blocks;
    }

Answer 2

使用 ElementAt(int32)

for(int i = 0; i < blocks.Count; i++) {
    Block block = blocks.ElementAt(i);
    Console.WriteLine("{0}", block.GetType());
}

Answer 3

Block 有一个属性 SiblingBlocks 可以满足您的需要。

BlockCollection containingCollection = block.SiblingBlocks

https:// msdn.microsoft.com/en-us/library/system.windows.documents.block.siblingblocks(v=vs.100).aspx