1. Malek Taha
  2. PowerBuilder
  3. Monday, 11 March 2024 22:11 PM UTC

Hi 

    I imported Bruce Armstrong  qrcodegenerator dll into my pb 2023R3 application and it worked fine.

 

I created a function that takes a string text and return a Blob using the same code that Mr. Armstrong used in the demo.

It worked fine if i have a picture control in a window.

When i have a picture control in a datawindow it does not work.

Can someone please help me on how i can do this.

 

This is crucial to our application as it generates labels and we use datawindows to make these labels

Thank You

Malek Taha

 

ls_base64 = inv_generator.of_generateqrcode( "This_is_a_testQR" )

co = create CoderObject

lblb_qrcode = co.base64decode(ls_base64)

destroy co

p_1.setpicture( lblb_qrcode ) // this worked

dw_1.object.p_1.setpicture( lblb_qrcode) // This does not work

 

 

Bruce Armstrong Accepted Answer Pending Moderation
  1. Thursday, 14 March 2024 17:30 PM UTC
  2. PowerBuilder
  3. # 1

The issue is that what I'm returning from the C# wrapper for QrCoder is a byte array (64 bit encoded so I can pass it back to PowerBuilder as a string), not a bitmap.  What you might want to do is modify the wrapper assembly code so that you can pass in a filename to save the data to.  

Then change this:
byte[] qrCodeBytes = pngByteQRCode.GetGraphic(20);
string qrCodeString = Convert.ToBase64String(qrCodeBytes);
return qrCodeString;

To something like

Bitmap bitmap=pngByteQRCode.GetGraphic(20);
bitmap.Save( <filename you passed in>, System.Drawing.Imaging.ImageFormat.Jpeg)

Comment
There are no comments made yet.
John Fauss Accepted Answer Pending Moderation
  1. Thursday, 14 March 2024 02:59 AM UTC
  2. PowerBuilder
  3. # 2

The contents of malek_test.bmp do not appear to be correctly formed, although Paint can open it, the Picture DWObject in PB cannot.

Using Paint, I opened malek_test.bmp, then immediately did a "Save As" to a JPG file named "malek_new_test.jpg". After changing the script to assign the JPG to the Picture DWobject in dw_1, the jpg file displays. Returning to Paint, I did another "Save As" to a BMP named "malek_new_test.bmp". After changing the script again to now assign the NEW BMP, it displays also:

I don't know how you created the BMP named "malek_test.bmp", but that process appears to be faulty in some manner and results in PB not being able to display it in a Picture DWObject. I'm not going to be any help to you in determining what is causing this incorrect BMP.

By the way, the BMP graphics format is a very bloated format. JPG's are much more compact.

Best regards, John

Comment
There are no comments made yet.
John Fauss Accepted Answer Pending Moderation
  1. Tuesday, 12 March 2024 00:53 AM UTC
  2. PowerBuilder
  3. # 3

Hi, Malek - 

As you have noted, there is no SetPicture method for a DataWindow's Picture DWObject. As far as I know, the only way you can display a picture stored in a Blob variable in a Picture DWObject is by first writing the blob to a file, then setting the Picture DWObject's Filename property to the newly-created file's path and name. Admittedly, this is not ideal for what you are needing to accomplish.

Best regards, John

Comment
There are no comments made yet.
Malek Taha Accepted Answer Pending Moderation
  1. Wednesday, 13 March 2024 19:49 PM UTC
  2. PowerBuilder
  3. # 4

Hi John

       Attached is a sample application in 2022R3 that Bruce armstrong wrote and i added a couple of objects for testing

 

on clicking encode, 

1 it generates a QR code blob which i saved to a file (malek_test.bmp)and do a Setfile of the blob to p_1 on the left top and P_2 on the left bottom both sets and read as expected

2)  I set the right top datawindow with a picture control with the saved file generated from the blob (malek_test.bmp) and this does not work

3)  I set the right bottom datawindow with a picture control with a stock bitmap of a qrcode (malek.bmp) and this does work

 

The code is in the encode button

Not sure what i am missing

Please advise

Thanks

malek

 

 

 

Attachments (1)
Comment
There are no comments made yet.
  • Page :
  • 1


There are no replies made for this question yet.
However, you are not allowed to reply to this question.