webview 打印

Question

我要打印一个包含 webview 的页面，如何根据webview的内容多少来分页？
当webview包含 base64 图片的时候打印预览 webview 区域出现一个大黑块，如何解决？

Answer 1

你好，

我可以重现你所说的黑块问题，不过我们取消之后再来第二次打印预览，就会发现base 64图片可以正常显示，我认为这个可能是一个解析图片的时间差问题，当图片被成功解析到内存之后就不会出现黑块啦。

另外，为什么要根据WebView内容来分页？打印所使用的是WebView在XAML页面中的高度，如果WebView的高度为100，那么打印出来的高度也为100，你需要设置的是WebView的高度。

--James

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Answer 2

当我的webview的高度超出屏幕的高度，打印预览的时候只显示屏幕可见区域，需要滚动条显示的区域怎样分页显示在下一页？

Answer 3

你好，

这应该没有办法，要么就是你把WebView的高度设置一个更大的值，打印的内容都是XAML的内容而非WebView内承载的内容。

--James

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Answer 4

我就是这么做的，webview的高度超出屏幕高度，滚动条滚动的是Grid的内容，可是打印的时候如何分页呢？像 sample 里面的 textblock 分页那样

Answer 5

你好，

请参考一下Sample里面的BasePrintPage.cs里面的AddOnePrintPreviewPage 方法。

通过 printPageDescription 的方式来定义打印页面的大小，从而实现对XAML内容的分页。

--James

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