如何捕获或渲染Canvas元素的图像

问题描述

我有xaml网格控件。在网格内我有InkCanvas和文本框。我想将整个网格转换为图像。但我只得到文本框内容。

I have xaml grid control. and inside grid I have InkCanvas and textbox. I want to convert the whole grid as image. but i am getting only textbox content.

我读过画布控件不适用于RenderAsync。  但我想要的是，将网格控件捕获为缩略图。有没有其他方法可以做到这一点。请帮帮我。

I read canvas control will not work with RenderAsync.  But I want is, capture grid control as thumbnail. Is there any alternate way to do this. Please help me.

谢谢，

Pallam Madhukar Windows Phone开发人员

Pallam Madhukar Windows Phone Developer

推荐答案

这是对的限制使用InkCanvas：

This is a limitation for RenderTargetBitmap.RenderAsync to working with InkCanvas:

从
here 

"渲染的内容需要在主窗口的可视树中。"这就是为什么canvas不能被这种方法使用。

"The rendered content needs to be in the main window's visual tree." So that is why canvas cannot be used by this method.

另一种方法是使用
Win2D

这是一个简单的文档：  

Here is a simple document about it: 

http://microsoft.github.io/Win2D/html/M_Microsoft_Graphics_Canvas_CanvasDrawingSession_DrawInk.htm

注意，由于您没有标记您的问题，我不确定您的项目类型。请注意，上述方法仅在Windows 10中受支持。 

Note, since you haven't tagged your question I'm not sure about your project type. Please notice the above method is only supported in Windows 10. 

顺便说一句，您还可以使用此关键字"Windows 10，UWP，InkCanvas"搜索您最喜爱的搜索引擎和RenderTargetBitmap"。关于如何使用InkCanvas做一个很好的博客。

By the way, you can also search with your favorite search engine with this key word "Windows 10, UWP, InkCanvas and RenderTargetBitmap". There is a good blog about how you can do it with InkCanvas.

祝你好运，

Barry 

Barry 

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