Reconsituting an OpenNetCF Signature on the Desktop

  • Thread starter Thread starter Darren Shaffer
  • Start date Start date
D

Darren Shaffer

All,

I'm struggling with bitmaps and byte arrays today. I'm using the OpenNetCF
Signature control and save the byte[] representing the signature into
SQLMobile.
If I read this byte[] from SQLMobile on device, I can reconstitute the
signature back
into the OpenNetCF Signature control with no issue.

If I replicate the table containing the signature byte[] to Yukon, I cannot
seem to
reconstitute the byte[] into a Bitmap that can be shown in a Full .NET
Framework
PictureBox on the desktop. I notice that on device, the SQLMobile image
column
represents the byte[] as F00000....

and after replicating to Yukon, the same image column looks like:

0xF00000...

I think I'm missing the Bitmap header information as Alex has explained in
responding to a few posts,
but wouldn't that info have to be written on device before replicating to
the desktop? Most examples
of this deal with writing the Bitmap on device to a local file and calling
it good, but I need to resolve
the bitmap to an Image column in SQLMobile in such a way that it can be
reconstituted in a
desktop application.

Thank you.
 
The GetSignature method of the Singature control in the SDF returns a byte
array of line points that have been recorded not the Bitmap bytes.

-Alex
 
thanks Alex.
--
Darren Shaffer
Principal Architect
Connected Innovation

Alex Yakhnin said:
The GetSignature method of the Singature control in the SDF returns a byte
array of line points that have been recorded not the Bitmap bytes.

-Alex

--
Alex Yakhnin, .NET CF MVP

Darren Shaffer said:
All,

I'm struggling with bitmaps and byte arrays today. I'm using the
OpenNetCF
Signature control and save the byte[] representing the signature into
SQLMobile.
If I read this byte[] from SQLMobile on device, I can reconstitute the
signature back
into the OpenNetCF Signature control with no issue.

If I replicate the table containing the signature byte[] to Yukon, I
cannot
seem to
reconstitute the byte[] into a Bitmap that can be shown in a Full .NET
Framework
PictureBox on the desktop. I notice that on device, the SQLMobile image
column
represents the byte[] as F00000....

and after replicating to Yukon, the same image column looks like:

0xF00000...

I think I'm missing the Bitmap header information as Alex has explained
in
responding to a few posts,
but wouldn't that info have to be written on device before replicating to
the desktop? Most examples
of this deal with writing the Bitmap on device to a local file and
calling
it good, but I need to resolve
the bitmap to an Image column in SQLMobile in such a way that it can be
reconstituted in a
desktop application.

Thank you.
Click to expand...
Click to expand...
 
using it now Sergey - thank you!

--
Darren Shaffer
Principal Architect
Connected Innovation

Sergey Bogdanov said:
Darren, you may consider this example [1] to get a user signature and save
it as monchrome bitmap.

[1] http://www.sergeybogdanov.com/Samples/SaveImage.zip

Best regards,
Sergey Bogdanov
http://www.sergeybogdanov.com


Darren said:
All,

I'm struggling with bitmaps and byte arrays today. I'm using the
OpenNetCF
Signature control and save the byte[] representing the signature into
SQLMobile.
If I read this byte[] from SQLMobile on device, I can reconstitute the
signature back
into the OpenNetCF Signature control with no issue.

If I replicate the table containing the signature byte[] to Yukon, I
cannot seem to
reconstitute the byte[] into a Bitmap that can be shown in a Full .NET
Framework
PictureBox on the desktop. I notice that on device, the SQLMobile image
column
represents the byte[] as F00000....

and after replicating to Yukon, the same image column looks like:

0xF00000...

I think I'm missing the Bitmap header information as Alex has explained
in responding to a few posts,
but wouldn't that info have to be written on device before replicating to
the desktop? Most examples
of this deal with writing the Bitmap on device to a local file and
calling it good, but I need to resolve
the bitmap to an Image column in SQLMobile in such a way that it can be
reconstituted in a
desktop application.

Thank you.
Click to expand...
Click to expand...
 
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