在流中保存和加载 Ink Canvas StrokeCollection [英] Save and load Ink Canvas StrokeCollection to/from stream

问题描述

我正在尝试在 WPF 中序列化墨水画布.所以我使用 StrokeCollection.Save 将笔画保存到 MemoryStream.但是，当我尝试将流加载到 InkCanvas 中时，我收到一个 ArgumentException 说明ISF 数据的长度必须大于零."
这是代码示例:

I'm trying to serialize an ink canvas in WPF. So I'm using StrokeCollection.Save to save the strokes to a MemoryStream. But when I try to load the stream into the InkCanvas I get an ArgumentException stating "The length of the ISF data must be greater than zero."
Here's the code sample:

using (MemoryStream ms = new MemoryStream())
{
    inkcanvas.Strokes.Save(ms);
    inkcanvas.Strokes = new System.Windows.Ink.StrokeCollection(ms);
}

我在这里遗漏了什么?

推荐答案

您是否检查了 Position 你的流?

Did you check the Position of the your stream?

我认为将笔画保存到其中后，它会指向它的结尾.
尝试将位置重置为第一个字符，如下所示:

I think that after saving the stroke into it it will point to the end of it.
Try to reset the position to the first character, like this:

using (MemoryStream ms = new MemoryStream())
{
    inkcanvas.Strokes.Save(ms);
    ms.Position = 0;
    inkcanvas.Strokes = new System.Windows.Ink.StrokeCollection(ms);
}

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