将InkCanvas笔划转换为字节数组，然后再次返回 [英] Converting InkCanvas Strokes to a Byte Array and back again
问题描述
我正在开发一个程序，该程序将墨水笔触转换为字节数组以进行加密，然后将其保存在txt文件中.本质上，我需要将字节数组转换为墨水笔触.我已经完成了代码的前半部分(它将墨水笔触转换为字节数组):
I am working on a program which converts the inkcanvas strokes to a byte array for encryption and then saves it in a txt file. Essentially I need to convert a byte array to inkcanvas strokes. I have the first half of the code done (which converts the inkcanvas strokes to a byte array):
private byte[] InkCanvasToByte()
{
using (MemoryStream ms = new MemoryStream())
{
if(myInkCanvas.Strokes.Count > 0)
{
myInkCanvas.Strokes.Save(ms, true);
byte[] unencryptedSignature = ms.ToArray();
return unencryptedSignature;
}
else
{
return null;
}
}
}
但是我需要帮助编写一个将字节数组转换为墨水笔触的方法，以便将墨水笔触转换为jpg.
But I need help writing a method to convert the byte array into inkcanvas strokes in order to convert the inkcanvas strokes to a jpg.
到目前为止，我已经创建了一个打开字节数组文件并将其写入字节数组变量的方法:
So far I have created a method which opens the byte array file and writes it to a byte array variable:
private void ReadByteArrayFromFile()
{
string Chosen_File = "";
Microsoft.Win32.OpenFileDialog ofd = new Microsoft.Win32.OpenFileDialog();
ofd.Filter = "All Files (*.*)|*.*";
ofd.FilterIndex = 1;
ofd.Multiselect = false;
bool? userClickedOK = ofd.ShowDialog();
if (userClickedOK == true)
{
Chosen_File = ofd.FileName;
}
byte[] bytesFromFile = File.ReadAllBytes(Chosen_File);
}
现在我要做的就是通过墨水笔触将该字节数组转换回图像.如果找到一个解决方案，我将用解决方案来更新！
Now all I need to do is convert that byte array back into an image, either through inkcanvas strokes. I'll update this post with a solution if I find one!
编辑:嗯.我正在使用该链接中的代码，并且得到:输入流不是有效的二进制格式.起始内容(按字节)是:00-FB-03-03-06-48-11-45-35 -46-35-11-00-00-80-3F-1F ..."
Hmm. I'm using the code from that link and I get: "The input stream is not a valid binary format. The Starting contents (in byes) are: 00-FB-03-03-06-48-11-45-35-46-35-11-00-00-80-3F-1F ..."
我正在使用的代码是:
private void ReadByteArrayFromFile(string Chosen_File)
{
byte[] bytesFromFile = File.ReadAllBytes(Chosen_File);
try
{
BinaryFormatter bf = new BinaryFormatter();
MemoryStream ms = new MemoryStream(bytesFromFile);
MyCustomStrokes customStrokes = bf.Deserialize(ms) as MyCustomStrokes;
for(int i = 0; i < customStrokes.StrokeCollection.Length; i++)
{
if(customStrokes.StrokeCollection[i] != null)
{
StylusPointCollection stylusCollection = new
StylusPointCollection(customStrokes.StrokeCollection[i]);
Stroke stroke = new Stroke(stylusCollection);
StrokeCollection strokes = new StrokeCollection();
strokes.Add(stroke);
this.MyInkPresenter.Strokes.Add(strokes);
}
}
}
catch (Exception ex)
{
System.Windows.MessageBox.Show(ex.Message);
}
}
private void DecryptByteArray(byte[] encryptedArray)
{
}
}
[Serializable]
public sealed class MyCustomStrokes
{
public MyCustomStrokes() { }
/// <SUMMARY>
/// The first index is for the stroke no.
/// The second index is for the keep the 2D point of the Stroke.
/// </SUMMARY>
public Point[][] StrokeCollection;
}
}
推荐答案
我的问题是我没有将输出序列化到保存的文件，因此当我加载该文件时，将其反序列化会导致错误.这是正确的代码:
My problem was that I didn't serialize the output to the saved file and thus the when I loaded that file deserializing it tripped an error. Here is the correct code:
private void SaveByteArrayToFile(byte[] byteArray)
{
var dialog = new System.Windows.Forms.FolderBrowserDialog();
string filepath = "";
if (dialog.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
filepath += dialog.SelectedPath;
System.Windows.MessageBox.Show(filepath);
}
filepath += "Signature.txt";
MyCustomStrokes customStrokes = new MyCustomStrokes();
customStrokes.StrokeCollection = new Point[myInkCanvas.Strokes.Count][];
for (int i = 0; i < myInkCanvas.Strokes.Count; i++)
{
customStrokes.StrokeCollection[i] =
new Point[this.myInkCanvas.Strokes[i].StylusPoints.Count];
for (int j = 0; j < myInkCanvas.Strokes[i].StylusPoints.Count; j++)
{
customStrokes.StrokeCollection[i][j] = new Point();
customStrokes.StrokeCollection[i][j].X =
myInkCanvas.Strokes[i].StylusPoints[j].X;
customStrokes.StrokeCollection[i][j].Y =
myInkCanvas.Strokes[i].StylusPoints[j].Y;
}
}
MemoryStream ms = new MemoryStream();
BinaryFormatter bf = new BinaryFormatter();
bf.Serialize(ms, customStrokes);
File.WriteAllBytes(filepath, Encrypt(ms.GetBuffer()));
}
private void ReadByteArrayFromFile(string Chosen_File)
{
byte[] bytesFromFile = File.ReadAllBytes(Chosen_File);
byte[] decryptedBytes = Decrypt(bytesFromFile);
try
{
BinaryFormatter bf = new BinaryFormatter();
MemoryStream ms = new MemoryStream(decryptedBytes);
MyCustomStrokes customStrokes = bf.Deserialize(ms) as MyCustomStrokes;
for(int i = 0; i < customStrokes.StrokeCollection.Length; i++)
{
if(customStrokes.StrokeCollection[i] != null)
{
StylusPointCollection stylusCollection = new
StylusPointCollection(customStrokes.StrokeCollection[i]);
Stroke stroke = new Stroke(stylusCollection);
StrokeCollection strokes = new StrokeCollection();
strokes.Add(stroke);
this.MyInkPresenter.Strokes.Add(strokes);
}
}
}
catch (Exception ex)
{
System.Windows.MessageBox.Show(ex.Message);
}
}
[Serializable]
public sealed class MyCustomStrokes
{
public MyCustomStrokes() { }
/// <SUMMARY>
/// The first index is for the stroke no.
/// The second index is for the keep the 2D point of the Stroke.
/// </SUMMARY>
public Point[][] StrokeCollection;
}
这篇关于将InkCanvas笔划转换为字节数组，然后再次返回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！
