Leadtools.Barcode Namespace > BarcodeReader Class : GetDefaultOptions Method |
For information about this method please see GetDefaultOptions.
public IBarcodeReadOptions GetDefaultOptions( BarcodeSymbology symbology )
'Declaration Public Function GetDefaultOptions( _ ByVal symbology As BarcodeSymbology _ ) As IBarcodeReadOptions
'Usage Dim instance As BarcodeReader Dim symbology As BarcodeSymbology Dim value As IBarcodeReadOptions value = instance.GetDefaultOptions(symbology)
public IBarcodeReadOptions GetDefaultOptions( BarcodeSymbology symbology )
ObjectiveC Syntax
function Leadtools.Barcode.BarcodeReader.GetDefaultOptions( symbology )
public: IBarcodeReadOptions^ GetDefaultOptions( BarcodeSymbology symbology )
Note: In LEADTOOLS for .NET, the equivalent to IBarcodeReadOptions is BarcodeReadOptions.
Public Sub BarcodeReader_GetDefaultOptionsExample() Dim imageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Barcode1.tif") ' Create a Barcode engine Dim engine As New BarcodeEngine() ' Get the Barcode reader instance Dim reader As BarcodeReader = engine.Reader ' Load the image Using codecs As New RasterCodecs() Using image As RasterImage = codecs.Load(imageFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1) ' Rotate the image by 90, so default option of reading horizonal barcodes will not work Console.WriteLine("Rotating the image by 90 degrees") Dim rotate As New RotateCommand(90 * 100, RotateCommandFlags.Resize, RasterColor.FromKnownColor(RasterKnownColor.White)) rotate.Run(image) ' Read a UPCA barcode from the image using default options Console.WriteLine("Reading barcodes using default options") Dim barcode As BarcodeData = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA) ' Show its location and data if found ' This will print out "Not found" If Not IsNothing(barcode) Then Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value) Else Console.WriteLine("Not found") End If ' Now set the default options for reading 1D barcodes to search for vertical barcodes and try again Dim oneDReadOptions As OneDBarcodeReadOptions = DirectCast(reader.GetDefaultOptions(BarcodeSymbology.UPCA), OneDBarcodeReadOptions) oneDReadOptions.SearchDirection = BarcodeSearchDirection.Vertical ' Read again Console.WriteLine("Reading barcodes using new options") barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA) ' Show its location and data if found ' This will find the barcode and print its information now If Not IsNothing(barcode) Then Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value) Else Console.WriteLine("Not found") End If End Using End Using End Sub Public NotInheritable Class LEAD_VARS Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" End Class
public void BarcodeReader_GetDefaultOptionsExample() { string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "Barcode1.tif"); // Create a Barcode engine BarcodeEngine engine = new BarcodeEngine(); // Get the Barcode reader instance BarcodeReader reader = engine.Reader; // Load the image using(RasterCodecs codecs = new RasterCodecs()) { using(RasterImage image = codecs.Load(imageFileName, 0, CodecsLoadByteOrder.BgrOrGray, 1, 1)) { // Rotate the image by 90, so default option of reading horizonal barcodes will not work Console.WriteLine("Rotating the image by 90 degrees"); RotateCommand rotate = new RotateCommand(90 * 100, RotateCommandFlags.Resize, RasterColor.FromKnownColor(RasterKnownColor.White)); rotate.Run(image); // Read a UPCA barcode from the image using default options Console.WriteLine("Reading barcodes using default options"); BarcodeData barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA); // Show its location and data if found // This will print out "Not found" if(barcode != null) { Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value); } else { Console.WriteLine("Not found"); } // Now set the default options for reading 1D barcodes to search for vertical barcodes and try again OneDBarcodeReadOptions oneDReadOptions = reader.GetDefaultOptions(BarcodeSymbology.UPCA) as OneDBarcodeReadOptions; oneDReadOptions.SearchDirection = BarcodeSearchDirection.Vertical; // Read again Console.WriteLine("Reading barcodes using new options"); barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA); // Show its location and data if found // This will find the barcode and print its information now if(barcode != null) { Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value); } else { Console.WriteLine("Not found"); } } } } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; }
[TestMethod] public async Task BarcodeReader_GetDefaultOptionsExample() { string imageFileName = @"Assets\Barcode1.tif"; // Create a Barcode engine BarcodeEngine engine = new BarcodeEngine(); // Get the Barcode reader instance BarcodeReader reader = engine.Reader; // Load the image using(RasterCodecs codecs = new RasterCodecs()) { StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(imageFileName); using(RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile))) { // Rotate the image by 90, so default option of reading horizonal barcodes will not work Debug.WriteLine("Rotating the image by 90 degrees"); RotateCommand rotate = new RotateCommand(90 * 100, RotateCommandFlags.Resize, RasterColorHelper.FromKnownColor(RasterKnownColor.White)); rotate.Run(image); // Read a UPCA barcode from the image using default options Debug.WriteLine("Reading barcodes using default options"); BarcodeData barcode = reader.ReadBarcode(image, LeadRectHelper.Empty, BarcodeSymbology.UPCA); // Show its location and data if found // This will print out "Not found" if(barcode != null) { Debug.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value); } else { Debug.WriteLine("Not found"); } // Now set the default options for reading 1D barcodes to search for vertical barcodes and try again OneDBarcodeReadOptions oneDReadOptions = reader.GetDefaultOptions(BarcodeSymbology.UPCA) as OneDBarcodeReadOptions; oneDReadOptions.SearchDirection = BarcodeSearchDirection.Vertical; // Read again Debug.WriteLine("Reading barcodes using new options"); barcode = reader.ReadBarcode(image, LeadRectHelper.Empty, BarcodeSymbology.UPCA); // Show its location and data if found // This will find the barcode and print its information now if(barcode != null) { Debug.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value); } else { Debug.WriteLine("Not found"); } } } }
public void BarcodeReader_GetDefaultOptionsExample(RasterImage image) { // Create a Barcode engine BarcodeEngine engine = new BarcodeEngine(); // Get the Barcode reader instance BarcodeReader reader = engine.Reader; // Load the image RasterCodecs codecs = new RasterCodecs(); // Rotate the image by 90, so default option of reading horizonal barcodes will not work Console.WriteLine("Rotating the image by 90 degrees"); RotateCommand rotate = new RotateCommand(90 * 100, RotateCommandFlags.Resize, RasterColor.FromKnownColor(RasterKnownColor.White)); rotate.Run(image); // Read a UPCA barcode from the image using default options Console.WriteLine("Reading barcodes using default options"); BarcodeData barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA); // Show its location and data if found // This will print out "Not found" if(barcode != null) { Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value); } else { Console.WriteLine("Not found"); } // Now set the default options for reading 1D barcodes to search for vertical barcodes and try again OneDBarcodeReadOptions oneDReadOptions = reader.GetDefaultOptions(BarcodeSymbology.UPCA) as OneDBarcodeReadOptions; oneDReadOptions.SearchDirection = BarcodeSearchDirection.Vertical; // Read again Console.WriteLine("Reading barcodes using new options"); barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA); // Show its location and data if found // This will find the barcode and print its information now if(barcode != null) { Console.WriteLine("Found a {0} barcode at {1}, data:\n{2}", barcode.Symbology, barcode.Bounds, barcode.Value); } else { Console.WriteLine("Not found"); } }
Public Sub BarcodeReader_GetDefaultOptionsExample(ByVal image As RasterImage) ' Create a Barcode engine Dim engine As BarcodeEngine = New BarcodeEngine() ' Get the Barcode reader instance Dim reader As BarcodeReader = engine.Reader ' Load the image Dim codecs As RasterCodecs = New RasterCodecs() ' Rotate the image by 90, so default option of reading horizonal barcodes will not work Console.WriteLine("Rotating the image by 90 degrees") Dim rotate As RotateCommand = New RotateCommand(90 * 100, RotateCommandFlags.Resize, RasterColor.FromKnownColor(RasterKnownColor.White)) rotate.Run(image) ' Read a UPCA barcode from the image using default options Console.WriteLine("Reading barcodes using default options") Dim barcode As BarcodeData = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA) ' Show its location and data if found ' This will print out "Not found" If Not barcode Is Nothing Then Console.WriteLine("Found a {0} barcode at {1}, data:" & Constants.vbLf & "{2}", barcode.Symbology, barcode.Bounds, barcode.Value) Else Console.WriteLine("Not found") End If ' Now set the default options for reading 1D barcodes to search for vertical barcodes and try again Dim oneDReadOptions As OneDBarcodeReadOptions = TryCast(reader.GetDefaultOptions(BarcodeSymbology.UPCA), OneDBarcodeReadOptions) oneDReadOptions.SearchDirection = BarcodeSearchDirection.Vertical ' Read again Console.WriteLine("Reading barcodes using new options") barcode = reader.ReadBarcode(image, LogicalRectangle.Empty, BarcodeSymbology.UPCA) ' Show its location and data if found ' This will find the barcode and print its information now If Not barcode Is Nothing Then Console.WriteLine("Found a {0} barcode at {1}, data:" & Constants.vbLf & "{2}", barcode.Symbology, barcode.Bounds, barcode.Value) Else Console.WriteLine("Not found") End If End Sub
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2