InkStroke to Byte Array to String [英] InkStroke to Byte Array to String

问题描述

我的项目必须序列化一个Ink Stroke并将其作为ValueSet传输

所以我的想法是从InkCanvas获得一个Byte数组ala

InkPresenter.StrokeContainer.SaveAsync（IOutputStream）

但没有得到任何结果或空字节数组

任何代码提示？

如何将Stream转换为Byte数组，我应该使用哪种流类型

-Hannes

解决方案

Hi
Hannes

InkPresenter.StrokeContainer .SaveAsync（IOutputStream）用于将墨迹保存到流中。

所以你需要先创建一个流。我建议你可以使用

InMemoryRandomAccessStream 保存InkStrokes。然后你可以使用
DataReader 加载流并获取字节数组。

您可以参考以下代码：

 //创建流
 InMemoryRandomAccessStream testStream = new InMemoryRandomAccessStream（）; 
 using（IOutputStream outputStream = testStream.GetOutputStreamAt（0））
 {
 //向流中保存inkstrokes 
等待inkCanvas.InkPresenter.StrokeContainer.SaveAsync（outputStream）; 
 await outputStream.FlushAsync（ ）; 
} 
 //使用datareader读取流
 var dr = new DataReader（testStream.GetInputStreamAt（0））; 
 //创建字节数组
 var bytes = new byte [testStream.Size]; 
 //加载流
 aw ait dr.LoadAsync（（uint）testStream.Size）; 
 //保存到字节数组
 dr.ReadBytes（bytes）; 
 

                                                                                            &NB属;                               

最好的问候，

罗伊

My Project have to serialize a Ink Stroke and Transfer it as ValueSet

So my idea is to get a Byte Array from InkCanvas ala

InkPresenter.StrokeContainer.SaveAsync(IOutputStream)

but didnt get any results or empty Byte Array

Any Code hint?

how to convert the Stream to Byte Array, which stream type I should use

-Hannes

解决方案

Hi Hannes

InkPresenter.StrokeContainer.SaveAsync(IOutputStream) is used to save the inkstrokes to a stream.

So you need to create a stream first. I suggest that you could use InMemoryRandomAccessStream to save the InkStrokes. Then you could use DataReader load the stream and get the byte arrays.

You could refer the following codes:

                            //create stream
                            InMemoryRandomAccessStream testStream = new InMemoryRandomAccessStream();
                            using (IOutputStream outputStream = testStream.GetOutputStreamAt(0))
                            {
                                //save inkstrokes to the stream 
                                await inkCanvas.InkPresenter.StrokeContainer.SaveAsync(outputStream);
                                await outputStream.FlushAsync();
                            }
                            //use datareader to read the stream
                            var dr = new DataReader(testStream.GetInputStreamAt(0));
                            //create byte array
                            var bytes = new byte[testStream.Size];
                            //load stream
                            await dr.LoadAsync((uint)testStream.Size);
                            //save to byte array
                            dr.ReadBytes(bytes); 

                                                                                                                       

Best regards,

Roy

这篇关于InkStroke to Byte Array to String的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！