Codejock Developer Community : MarkupLabel - capture image

MarkupLabel - capture image : drimage wrote:the following...

Wed, 04 Sep 2013 23:26:44 +0000

Author: arronlee
Subject: 15125
Posted: 04 September 2013 at 11:26pm

drimage wrote:

the following are some codes about how to capture images in vb.

Public Function TwainAcquireToRasterEdgeImageImage(ByVal HANDLE As Integer) As Integer
' Acquire a single image, from the currently selected Data Source to a DIB handle
Public Function TwainAcquireToDib(ByVal HANDLE As IntPtr) As IntPtr
' Acquire a single image, from the currently selected Data Source to a file
Public Function TwainAcquireToFile(ByVal FilePath As String, ByVal HANDLE As Integer) As RasterEdgeImageStatus

Hi, thanks for your sharing.
Becayse I am not so familiar with VB.NET processing, I focus more on capturing images using Twain Scanning in C#.NET. Can you offer some more tutorials about that?Thanks in advance.

Best regards,
Arron

MarkupLabel - capture image : the following are some codes about...

Wed, 05 Jun 2013 22:57:05 +0000

Author: drimage
Subject: 15125
Posted: 05 June 2013 at 10:57pm

the following are some codes about how to capture images in vb.

Public Function TwainAcquireToRasterEdgeImageImage(ByVal HANDLE As Integer) As Integer
' Acquire a single image, from the currently selected Data Source to a DIB handle
Public Function TwainAcquireToDib(ByVal HANDLE As IntPtr) As IntPtr
' Acquire a single image, from the currently selected Data Source to a file
Public Function TwainAcquireToFile(ByVal FilePath As String, ByVal HANDLE As Integer) As RasterEdgeImageStatus

MarkupLabel - capture image : This works fine if the XAML is...

Sat, 13 Feb 2010 16:14:47 +0000

Author: Andrew666
Subject: 15125
Posted: 13 February 2010 at 4:14pm

This works fine if the XAML is fully visible - but if it is partially or totally hidden (e.g. if the containing form is not visible) then it won't work, as it depends on BitBlt. Putting it in a PrintPreview control doesn't work either, as you can't do anything but print from that control.

It would be great if there was a "copy" method for the XAML markup label or access to a picture object...

--Andrew

MarkupLabel - capture image : Cool, nice work Chris! Thanks...

Mon, 07 Sep 2009 08:56:15 +0000

Author: jpbro
Subject: 15125
Posted: 07 September 2009 at 8:56am

Cool, nice work Chris! Thanks for this.

MarkupLabel - capture image : Using the MarkupLabel control...

Sun, 06 Sep 2009 20:02:07 +0000

Author: chrisABC
Subject: 15125
Posted: 06 September 2009 at 8:02pm

Using the MarkupLabel control you can create an image on the label from XAML, for example a Chart.

Here is some VB code that allows you to capture this image, with examples showing how to copy it to the Clipboard, Save to disk as a BMP, or Print to printer.

It uses API calls, and stores the captured image in a PictureBox (which is not visible). There may be easier or better ways to do this, but this seems to work fine.

You need a Form with a MarkupLabel on it. Add three Command Buttons and a PictureBox.

There is just one Function, and some Declarations
(uploads/20090906_195728_CaptureMarkupLa.zip).
And the following in the Button Click events:

Private Sub cmdCopy_Click()
Set Picture1.Picture = CaptureMarkupToPicturebox
Clipboard.Clear ' Clear Clipboard.
Clipboard.SetData Picture1.Image, vbCFBitmap
End Sub

Private Sub cmdPrint_Click()
Set Picture1.Picture = CaptureMarkupToPicturebox
Printer.PaintPicture Picture1.Image, 100, 100 ', p.Width * Resize, p.Height * Resize
Printer.EndDoc
End Sub

Private Sub cmdSave_Click()
Set Picture1.Picture = CaptureMarkupToPicturebox
SavePicture Picture1.Picture, "C:\mychart.bmp"
End Sub

Also set the PictureBox properties (eg in Form_Load)
Picture1.AutoSize = True
Picture1.Visible = False

I added this code to the excellent XamlCharts sample (which you can download from this Forum).
Now I can Print, Copy, or Save the resulting Chart images.