License Initialization

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Set the License In the Code

The following shows how to set the license in the code.

JavaScript
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// Option 1: Set the license when using the RTU (Ready-To-Use) class `BarcodeScanner`.
// Note: The license initialization is deferred until `launch()` is called.
const barcodeScanner = new Dynamsoft.BarcodeScanner({
  license: "YOUR_LICENSE_KEY",
});
// Option 2: Set the license when using the Foundational API.
// Note: The license initialization is also deferred.
Dynamsoft.License.LicenseManager.initLicense("YOUR_LICENSE_KEY");

  char errorBuf[512];
  DBR_InitLicense("YOUR-LICENSE-KEY", errorBuf, 512);
  void* barcodeReader = DBR_CreateInstance();
  // add further process

    int errorCode = 1;
    char errorMsg[512];
    errorCode = CLicenseManager::InitLicense("YOUR-LICENSE-KEY", errorMsg, 512);
    if (errorCode != EC_OK)
        cout << "License initialization error: " << errorMsg << endl;
    CCaptureVisionRouter *cvRouter = new CCaptureVisionRouter;
    // add further process

  int errorCode = 0;
  string errorMsg;
  errorCode = LicenseManager.InitLicense("--Enter Your License Key Here--", out errorMsg);
  if (errorCode != (int)EnumErrorCode.EC_OK && errorCode != (int)EnumErrorCode.EC_LICENSE_CACHE_USED)
  {
      Console.WriteLine("License initialization error: " + errorMsg);
  }
  else
  {
      CaptureVisionRouter cvRouter = new CaptureVisionRouter();
      // add code for further process
  }

try {
    LicenseError licenseError = LicenseManager.initLicense("YOUR-LICENSE-KEY");
    if (licenseError.getErrorCode() != EnumErrorCode.EC_OK) {
        System.out.println("License initialization failed: ErrorCode: " + licenseError.getErrorCode() + ", ErrorString: " + licenseError.getErrorString());
        return;
    }
} catch (LicenseException e) {
    System.out.println("License initialization failed: ErrorCode: " + e.getErrorCode() + ", ErrorString: " + e.getErrorString());
    return;
}
// add further process

LicenseManager.initLicense("YOUR-LICENSE-KEY", this, (isSuccess, error) -> {
   if (!isSuccess) {
          error.printStackTrace();
   }
});

[DSLicenseManager initLicense:@"YOUR-LICENSE-KEY" verificationDelegate:self];
- (void)onLicenseVerified:(BOOL)isSuccess error:(nullable NSError *)error {
    if (!isSuccess && error != nil) {
        NSLog(@"error: %@", error);
    }
}

LicenseManager.initLicense("YOUR-LICENSE-KEY", verificationDelegate: self)
func onLicenseVerified(_ isSuccess: Bool, error: Error?) {
   if !isSuccess {
          if let error = error {
             print("\(error.localizedDescription)")
          }
   }
}

error_code, error_msg = LicenseManager.init_license("--Enter Your License Key Here--")
if error_code != EnumErrorCode.EC_OK.value and error_code != EnumErrorCode.EC_LICENSE_CACHE_USED.value:
    print("License initialization error: " + error_msg)
else:
    cvr_instance = CaptureVisionRouter()
    # add code for further process

If you are using a concurrent instance license, see How to properly use concurrent instance license for more information.