Hi everybody,
I am problem with restoring data of byte[] type to be loaded on an Ink object. The data was earlier converted to byte[] then finally to hexadecimal data and store on a text file. Is there anyone who can help me solve this problem. Thanks.
Note: The Ink object is from Microsoft.Ink namespace.
Code:
private void LoadXML()
{
try
{
// This object will encode our byte data to a UTF8 string
UTF8Encoding utf8 = new UTF8Encoding();
Ink loadedInk = new Ink();
string filePath = Application.StartupPath + "\\siganture.txt" +
StreamReader sreader = new StreamReader(filePath);
string Signature = sreader.ReadToEnd();
// load the ink into a new ink object
// once an ink object has been "dirtied" it can never load ink again
loadedInk.Load(utf8.GetBytes(strSignature)); <- Error Occurs here
// temporarily disable the ink collector and swap ink objects
ic.Enabled = false;
ic.Ink = loadedInk;
ic.Enabled = true;
// Repaint the inkable region
this.pictureBox.Invalidate();
}
catch (Exception ex)
{
//error handling processes
}
}
Error Message:
"System.Runtime.InteropServices.COMException (0x8000FFFF): Catastrophic failure\r\n at Microsoft.Ink.InkDispClass.Load(Object Data)\r\n at Microsoft.Ink.Ink.Load(Byte[] inkdata)\r\n at SignatureForm.LoadSiganture() in c:\\....\\signatureform.cs:line 2163\r\n at signatureForm.btnCancel_Click(Object sender, EventArgs e) in c:\\...\\signatureform.cs:line 705\r\n at System.Windows.Forms.Control.OnClick(EventArgs e)\r\n at System.Windows.Forms.Button.OnClick(EventArgs e)\r\n at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)\r\n at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button,
Int32 clicks)\r\n at System.Windows.Forms.Control.WndProc(Message& m)\r\n at System.Windows.Forms.ButtonBase.WndProc(Message& m)\r\n at System.Windows.Forms.Button.WndProc(Message& m)\r\n at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)\r\n
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)\r\n at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)\r\n at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)\r\n at System.Windows.Forms.ComponentManager.System.Windows.Forms.UnsafeNativeMethods+IMsoComponentManager.
FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)\r\n at System.Windows.Forms.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)\r\n at System.Windows.Forms.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)\r\n at System.Windows.Forms.Application.Run(Form mainForm)\r\n at MainForm.Main() in c:\\....\\mainform.cs:line 557"
den2005
Error Restoring Signature (Hexadecimal format)
c&#35; crack
Hi Den,
did you try to use FileStream and read byte[] rather than read as string then convert to byte[]
Try this:
FileStream fStream = new FileStream(filePath);
loadedInk.Load(arOfByte);byte[] arOfByte = new byte[fStream.Length];
fStream.Read(arOfByte, 0, arOfByte.Length];
blablabla...
Sonic1981
This can be done relatively simply by considering a pair of characters at a time.
If the format of the file can be changed to a binary format, then yes - writing the data directly out as binary and then reading it as binary would be simpler. I would suggest a change of filename from ".txt" at that stage though...
Jon
Chris_Botha
den2005