自定义文档分页器:“指定的视觉已经是另一个视觉的子元素或CompositionTarget的根." [英] Custom Document Paginator: "Specified Visual is already a child of another Visual or the root of a CompositionTarget."

问题描述

您好，我使用冯远的文章

我从内容中以编程方式创建流文档，获取其IDocumentPaginatorSource.DocumentPaginator对象，并将其包装在paginator包装器的实例中:

I create a flow document programmatically from my content, grab its IDocumentPaginatorSource.DocumentPaginator object and wrap that in an instance of the paginator wrapper:

代码块

推荐答案

您好，我有在丰元的文章中围绕Flow Document Paginator概念创建了代码:

我的程序将此自定义分页器的一个实例馈送到DocumentPageView对象，该对象与一组用于分页(向后，向前等)的按钮结合在一起.

My program feeds an instance of this custom paginator into a DocumentPageView object that is coupled with a set of buttons for paging through (back, forward, etc).

有时我会得到指定的Visual已经是另一个Visual的子级或CompositionTarget的根."在将内部DocumentPage添加到较小页面的子代的行上:

Sometimes I get "Specified Visual is already a child of another Visual or the root of a CompositionTarget." on the line where the inner DocumentPage is being added to the children of the smaller page:

代码块

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