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

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

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

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)