I want to capture image via SNAPI API from Symbol (currently Zebra) barcode scanner, model DS4208 (we're also using another but compatible models from Zebra).
Barcode capturing/recognition works pretty well, but looks like SnapiDLL.SNAPI_SnapShot(hScanner) call don't work correctly: no WM_XFERSTATUS message received at all.
Here is small & simplified code snippet:
// Set image format
short[] parms = new short[2] { (short)SnapiParamIds.ImageFileType, (short)SnapiImageTypes.Jpeg };
var retCode = SnapiDLL.SNAPI_SetParameters(parms, 2, _devHandles[0]);
Debug.WriteLine($"SNAPI_SetParameters retCode={retCode}");
Application.DoEvents();
Thread.Sleep(50);
retCode = SnapiDLL.SNAPI_SnapShot(_devHandles[0]);
Debug.WriteLine($"SNAPI_SnapShot retCode={retCode}");
Application.DoEvents();
Thread.Sleep(50);
retCode = SnapiDLL.SNAPI_PullTrigger(_devHandles[0]);
Debug.WriteLine($"SNAPI_PullTrigger retCode={retCode}");
Application.DoEvents();
Thread.Sleep(50);
Return codes always 0 (i.e. no error), but no WM_XFERSTATUS message received by my message handler.
P.S. C# application from Zebra's SDK which is using CoreScanner driver and OCX, is working fine and able to capture images and video. But I'd like to avoid CoreScanner driver installation for some reasons; for barcode scanning small and simple SNAPI.dll works pretty fine, and I expect to get it work for image capturing too - probably, I'm doing something wrong...
P.P.S. Guys, please DO NOT COMMENT if you have NO EXPERIENCE WORKING WITH SYMBOL BARCODE SCANNERS & SNAPI, and CAN NOT PROVIDE a working snippet!
After contacting Zebra tech support (they are successors of Symbol/Motorola barcode scanner business), I figured out that the imaging/video functionality is broken in SNAPI.dll for the x64 OSes (but most of the rest API calls are working properly). Unfortunately, SNAPI isn't supported by Zebra anymore, and I should use Zebra's CoreScanner API. The good news is: this API is working fine, as it supposed to be. Not a very good news: I should use additional installation package from Zebra.
Related
I am using the library DryWetMIDI for .net 7 and I am trying to connect a MIDI output device to MAUI. When I connect a input device it seems to work fine but the only output from the outputdevice I could get was the following error: Internal error (OUT_SENDSHORTRESULT_INVALIDHANDLE). When I tried everything in a simple console application it works perfectly.
Also because of my lack in experience in Maui I don’t really know if I should change something in the project dependencies or in the builder. Or maybe declare the MIDI in the App or the Appshell...
So I tried to create a input device and a output device and connect them to eachother (This is what the DryWetMIDI suggested). Next I try to get the events from the input and the outup device, the input device works but the output device doesnt.
I use the following code where the ouput device doesnt work in Maui:
private InputDevice inputDevice;
private OutputDevice outputDevice;
private DevicesConnector devicesConnector;
void ConnectMidi()
{
//create input device
inputDevice = InputDevice.GetByName("Keystation Mini 32");
inputDevice.EventReceived += OnEventReceived;
//create ouput device;
outputDevice = OutputDevice.GetByName("Microsoft GS Wavetable Synth");
outputDevice.EventSent += OnEventSent;
//connect them
devicesConnector = inputDevice.Connect(outputDevice);
inputDevice.StartEventsListening();
}
public void OnEventReceived(object sender, MidiEventReceivedEventArgs e)
{
var midiDevice = (MidiDevice)sender;
Debug.WriteLine("This gets called when a key is pressed") ;
}
public void OnEventSent(object sender, MidiEventReceivedEventArgs e)
{
var midiDevice = (MidiDevice)sender;
Debug.WriteLine("This gets never called");
}
If there is anohter solution using a diffrent library or something else I would love to hear it!
Hopefully this makes my problem clear and thanks in advance.
(This is also my first post so feedback would also be nice)
I'm the author of the DryWetMIDI. I've analyzed the problem:
The bug is not with the library, it's a MAUI related one.
The error comes from midiOutOpen system Windows function which fails for Microsoft GS Wavetable Synth in a MAUI project but works for any other project types.
I've reported the bug in MAUI repo: https://github.com/dotnet/maui/issues/12368. So what we have is to wait for response from Microsoft.
Update:
The bug has been moved to WinUI repo: https://github.com/microsoft/microsoft-ui-xaml/issues/8055. Also you can mark your project as Unpackaged and the issue should go away.
Since Vista, Windows is shipped with WIA 2.0 (wiaaut.dll).
According to the following KB article and many of my findings on various forums, duplex scanning is no longer possible using WIA 2.0. Yet, the article mentions the use of native WIA 2.0, what would make duplex scanning possible.
(https://support.microsoft.com/en-us/kb/2709992)
According to the WIA 2.0 documentation (https://msdn.microsoft.com/en-us/library/windows/desktop/ms630196(v=vs.85).aspx), duplex scanning is possible but using the new WIA_IPS_DOCUMENT_HANDLING_SELECT (3088) property.
My issues are:
I have no idea how to use native WIA, I suspect when using C# its just not possible.
I cant find a way to set the new WIA_IPS_DOCUMENT_HANDLING_SELECT property, as the property is not present in my wiaDevice properties. According to WiaDef.h, its property id is still 3088 and the only possible value is 0x400 (1024).
If anyone could help me (and I think many others) out on this, it would be much appreciated!
Greetings,
M.
After a few more hours of searching I found a clue in the following post.
https://stackoverflow.com/a/7580686/3641369
As I used a one-pass duplex scanner, both front and back sides where scanned at the same time. By setting the device properties (device properties, not item properties) Document_Handling_Select to 5 (Feeder + Duplex) and Pages to 1 and calling the transfer method 2 times, I finally got the font and back side of the scan.
Setting wiaDev.Properties["Document Handling Select"] = 5 specifies the use of the feeder and scanning duplex.
Setting wiaDev.Properties["Pages"] = 1 specifies that the scanner should keep 1 page in memory, this allowing to keep both front side and back side of the page in memory during 1 scan pass.
if (duplex)
{
wiaDev.Properties["Document Handling Select"].set_Value(5);
wiaDev.Properties["Pages"].set_Value(1);
}
Getting the Wia item and setting item properties such as color and dpi.
var item = wiaDev.Items[1];
item.Properties["6146"].set_Value((int)clr);
item.Properties["6147"].set_Value(dpi);
item.Properties["6148"].set_Value(dpi);
Then calling the transfer method twice returns two different images
var img = (ImageFile)wiaCommonDialog.ShowTransfer(item, FormatID.wiaFormatJPEG);
ImageFile imgduplex = null;
if(duplex)
imgduplex = (ImageFile)wiaCommonDialog.ShowTransfer(item, FormatID.wiaFormatJPEG);
Hope this helps someone!
Okay. Well, I know this question has a good chance of being closed within the first 10 minutes, but I am going to ask it anyways for I have spent almost day and an half trying to find a solution. Still, I can't figure this one out. There is not much info on this on the Internet not even on the HASP (safenet) website although they have demos.
I have a HASP HL USB dongle. I try to convert their demo and test run it but for the life of me I simply can't get it to login even. It keeps raising Aladdin.HASP.HaspStatus.HaspDotNetDllBroken exception.
However, if I run the C version of their demo, it works perfectly.
Here is the Csharp version of my code:
Aladdin.HASP;
HASP myHasp = new HASP();
var thestatus = myHasp.Login(vender_code);
myHasp.Logout;
I would like to login to USB HASP and get its HaspID and the settings in its memory.
Thanks in advance,
It might be that you aren't having all dependencies for the HASP runtime. I'm packing with the app:
hasp_windows_NNNNN.dll (NNNNN = your number)
hasp_net_windows.dll
MSVCR71.DLL (added manually)
msvc runtime 80
One runtime library is required by HASP and it doesn't tell you which one unless you put it in the DEPENDS.EXE utility (you probably have you on your Visual Studio installation).
To log in (and read some bytes):
byte[] key = new byte[16];
HaspFeature feature = HaspFeature.FromFeature(4);
string vendorCode = "your vendor string, get it from your tools";
Hasp hasp = new Hasp(feature);
HaspStatus status = hasp.Login(vendorCode);
if (HaspStatus.StatusOk != status)
{
// no license to run
return false;
}
else
{
// read some memory here
HaspFile mem = hasp.GetFile(HaspFileId.ReadOnly);
mem.Read(key, 0, 16);
status = hasp.Logout();
if (HaspStatus.StatusOk != status)
{
//handle error
}
}
Hope it helps. My HASPed software works like a charm. BTW, wasn't able to put envelope around .NET app under no combination of settings.
I have coding I almost always use with my Omnikey RFID CardMan 5321 smart cards. Problem is we received new cards today which are marked "HID iCLASS GL" which do not appear to be working well with our coding.
Without going through the whole source, our problem is arising when we are calling the following line, which basically tells us the length of the data:
lResult = SCardTransmit(hCard, 0, bytCommand, lLen, 0, byReadBuffer, iReturnlength)
We are returning only a length of 2, which the data is marked as "x69 x86". Even if I tell it to read all 255 chr's the rest are just marked as null.
Now I know our reader can read these cards since the OMNIKEY Diagnostic tool is showing us the following:
Status: Smart Card Inserted
FW: 5.10
Port: USB
Lib: 1.0
Smart Card Nme: iCLASS 32KS 8x2+16
ART: Valid
Protocol: ISO 15693 (Part 2)
PICCtoPCD: 26,48 kbps
PCDtoPICC: 26,48 kbps
Frequ: 13.56 MHz
As I explained before, everything is working fine in my coding except no data is being returned for my card besides "x69 x86", which is surely not correct.
If anyone has any experience reading from a HID iCLASS card, I would greatly appreciate some feedback on how to. Even if we have to license software, that is ok.
Thanks in advance!
in case you are trying to access physical access data, I would thoroughly check the crypto protocol between reader and host first and also meke sure you are using a reader with teh latest firmware (5.20 for the OMNIKEY 5321).
I would also introduce code to check the card system withour secure communication channel between host and reader application.
Further references:
http://www.hidglobal.com/documents/ok_contactless_developer_guide_an_en.pdf
The reason cause you get a 2 Byte array is cause your command runs on an error so the chip returns only SW1 and SW2 Flag
in your case it's meaning is
x69 --> Command not allowed (further qualification in SW2, see table 17)
x86 --> Command not allowed (no current EF)
So you might proof that your application file on the chip is correctly selected
further information #
http://www.cardwerk.com/smartcards/smartcard_standard_ISO7816-4_5_basic_organizations.aspx#table17
How to remove the SIP button of Windows mobile? I need a solution for Windows Mobile V6.
Please post some sample app, or link about how to remove the SIP button.
I have tried out this technique..
SHFullScreen(this.Handle, SHFS_HIDESIPBUTTON);
This is not working for me. If you know please post full code.
If you only want to remove the SIP, this works for me (I'm using CeGCC as my compiler), and no .dll linking is needed (tested on a HTC Universal running WM6.1).
HWND hWndSipButton = FindWindow(TEXT("MS_SIPBUTTON"), NULL);
if(hWndSipButton != NULL) {
ShowWindow(hWndSipButton, SW_HIDE);
}
Keep in mind you'll also need to insert this code at places right after windows mobile likes to restore the SIP (e.g. put it in response to a WM_ACTIVATE message too).
If you want the entire display surface for your application, then this should do the trick:
iDisplayWidth = GetSystemMetrics(SM_CXSCREEN);
iDisplayHeight = GetSystemMetrics(SM_CYSCREEN);
SHFullScreen(hwndClient, SHFS_HIDESIPBUTTON | SHFS_HIDETASKBAR | SHFS_HIDESTARTICON);
MoveWindow(hwndClient, 0, 0, iDisplayWidth, iDisplayHeight, TRUE);