Produkt-Info
ReferenzenFirst of all, let me compliment you on your Barcode.NET Library. We evaluated a number of products to use in our application, and yours was our favorite. Dan Konigsberg  
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VintaSoftBarcode.NET SDK - FAQAllgemeine Fragen:
Distribution:
Programmierung:
Für welche Zwecke kann ich die VintaSoftBarcode.NET Library nutzen?Diese Bibliothek erlaubt das Lesen und Schreiben von 1D-, Post- und 2D-Barcodes in digitale Bilder und PDF-Dateien.
Was beinhaltet die Bibliothek?Die Bibliothek beinhaltet:
In welchen Programmiersprachen kann ich die VintaSoftBarcode.NET Library nutzen?Mit der Entwickler-Lizenz oder der Site-Lizenz können sie die Komponente nutzen in:
Mit der Server-Lizenz können sie die Komponente nutzen in:
Welche Beschränkungen hat die unregistrierte Version der Komponente?Unregistrierte Version hat folgende Beschränkungen:
Ich habe eine Frage oder Problem. Was kann ich tun?Die Antworten auf die meisten Fragen stehen bestimmt in der Dokumentation zur Komponente oder in den FAQ. Wenn Sie können nicht antwort zu Ihre Frage finden, dann schreiben Sie bitte an den technischen Support.
Welche Dateien muss ich in das Distributionpaket meines Programms einbinden?Sie sollen nur die Vintasoft.Barcode.dll Datei in das Distributionpaket Ihres Programms ergänzen.
Kann ich die Vintasoft.Barcode.dll Datei zusammen mit meiner Anwendung ohne Lizenzzahlungen verbreiten?Ja, Sie können die Vintasoft.Barcode.dll Datei zusammen mit ihrer Anwendung verbreiten. Sie zahlen nur für die primäre Registrierung. Die Site-Lizenz hat keine Beschränkungen zur Verbreitung. Die Entwickler-Lizenz hat Beschränkungen zur Verbreitung. Server-Lizenz Verbreitung ist nicht lizenzfrei. Bitte lesen Sie das Lizenzabkommen für ausführliche Informationen.
Wie kann ich maximieren die Barkode-Lesegeschwindigkeit?Hier sind einige Tipps, die können Ihnen helfen zu maximieren die Barkode-Lesegeschwindigkeit:
Wie kann ich bekommen die stabilste Barcode Erstellung und Erkennung System?Hier ist eine Liste der Schritte, die Ihnen helfen stabiler Barcodelesung System zu schaffen:
Gibt es Empfehlungen für die Schaffung von 1D-Barcodes und weitere Lesung?Code 39 und Code 128 sind die meisten stabilen linearen Barcodes für Schäden und Verzerrung.
Gibt es Empfehlungen für die Schaffung von 2D-Barcodes und weitere Lesung?Data Matrix sind die meisten stabilen 2D-Barcode für Schäden und Verzerrung. Aztec ist das kompakteste. Nach kommen DataMatrix, QR-Code und PDF417.
Hat die Bibliothek Mehrwegverarbeitung unterstützung?Ja, Multithreading ist seit Version 5.0 unterstützt. Main-Algorithmus kann zur N-Threads skaliert werden.
Wie kann ich erkennen Barkode in farbiges Bild mit geringer Qualität?Es gibt zwei Möglichkeiten:
[VB.NET]
Private Shared Sub ScanWithIterations(ByVal fileName As String, ByVal barcodes As BarcodeType, _
ByVal expectedBarcodes As Integer, ByVal iterationCount As Integer, ByVal minThreshold As Integer, ByVal maxThreshold As Integer)
Dim barcodeImage As Image = Image.FromFile(fileName)
Dim reader As New BarcodeReader()
reader.Settings.ScanBarcodeTypes = barcodes
reader.Settings.ExpectedBarcodes = expectedBarcodes
reader.Settings.ThresholdIterations = iterationCount
reader.Settings.Threshold1D = minThreshold
reader.Settings.Threshold2D = maxThreshold
' read barcodes
Dim barcodesInfo As IBarcodeInfo() = reader.readBarcodes(barcodeImage)
If barcodesInfo.Length = 0 Then
Console.WriteLine("No barcodes found.")
Else
For i As Integer = 0 To barcodesInfo.Length - 1
Dim inf As IBarcodeInfo = barcodesInfo(i)
Console.WriteLine(String.Format("[{0}] {1} (Threshold: {2})", inf.BarcodeType, inf.Value, inf.Threshold))
Next
End If
barcodeImage.Dispose()
End Sub
Private Shared Sub TestScanWithIterationsCode128orDataMatrix(ByVal fileName As String)
' find one Code 128 or DataMatrix barcode from 400 to 600 threshold (10 iterations)
ScanWithIterations(fileName, BarcodeType.Code128 Or BarcodeType.DataMatrix, 1, 10, 400, 600)
End Sub
[C#]
static void ScanWithIterations(string fileName, BarcodeType barcodes, int expectedBarcodes,
int iterationCount, int minThreshold, int maxThreshold)
{
Image barcodeImage = Image.FromFile(fileName);
BarcodeReader reader = new BarcodeReader();
reader.Settings.ScanBarcodeTypes = barcodes;
reader.Settings.ExpectedBarcodes = expectedBarcodes;
reader.Settings.ThresholdIterations = iterationCount;
reader.Settings.Threshold1D = minThreshold;
reader.Settings.Threshold2D = maxThreshold;
// read barcodes
IBarcodeInfo[] barcodesInfo = reader.ReadBarcodes(barcodeImage);
if (barcodesInfo.Length == 0)
{
Console.WriteLine("No barcodes found.");
}
else
{
for (int i = 0; i < barcodesInfo.Length; i++)
{
IBarcodeInfo inf = barcodesInfo[i];
Console.WriteLine(string.Format("[{0}] {1} (Threshold: {2})", inf.BarcodeType, inf.Value, inf.Threshold));
}
}
barcodeImage.Dispose();
}
static void TestScanWithIterationsCode128orDataMatrix(string fileName)
{
// find one Code 128 or DataMatrix barcode from 400 to 600 threshold (10 iterations)
ScanWithIterations(fileName, BarcodeType.Code128 | BarcodeType.DataMatrix, 1, 10, 400, 600);
}
Wie kann ich Barcodes aus multipage TIFF Datei lesen?Hier ist ein einfacher Code:
[VB.NET]
Private Shared Sub ReadBarcodesFromMiltipageTiffFile(ByVal fileName As String, ByVal barcodes As BarcodeType)
' open tiff image
Dim tiffImage As Image = Image.FromFile(fileName)
Dim index As Guid = tiffImage.FrameDimensionsList(0)
Dim dimension As New FrameDimension(index)
Dim pageCount As Integer = tiffImage.GetFrameCount(dimension)
' create reader
Dim reader As New BarcodeReader()
reader.Settings.ScanBarcodeTypes = barcodes
' read barcodes from all pages
For i As Integer = 0 To pageCount - 1
' selects a page
tiffImage.SelectActiveFrame(dimension, i)
' read barcodes from page i
Dim barcodesInfo As IBarcodeInfo() = reader.readBarcodes(tiffImage)
' write information
Console.WriteLine(String.Format("Page {0}: ", i))
If barcodesInfo.Length = 0 Then
Console.WriteLine("No barcodes found.")
Else
For j As Integer = 0 To barcodesInfo.Length - 1
Console.WriteLine(String.Format("[{0}] {1}", barcodesInfo(j).BarcodeType, barcodesInfo(j).Value))
Next
End If
Next
' free resources
tiffImage.Dispose()
End Sub
[C#]
static void ReadBarcodesFromMiltipageTiffFile(string fileName, BarcodeType barcodes)
{
// open tiff image
Image tiffImage = Image.FromFile(fileName);
Guid index = tiffImage.FrameDimensionsList[0];
FrameDimension dimension = new FrameDimension(index);
int pageCount = tiffImage.GetFrameCount(dimension);
// create reader
BarcodeReader reader = new BarcodeReader();
reader.Settings.ScanBarcodeTypes = barcodes;
// read barcodes from all pages
for (int i = 0; i < pageCount; i++)
{
// selects a page
tiffImage.SelectActiveFrame(dimension, i);
// read barcodes from page i
IBarcodeInfo[] barcodesInfo = reader.ReadBarcodes(tiffImage);
// write information
Console.WriteLine(string.Format("Page {0}: ", i));
if (barcodesInfo.Length == 0)
{
Console.WriteLine("No barcodes found.");
}
else
{
for (int j = 0; j < barcodesInfo.Length; j++)
Console.WriteLine(string.Format("[{0}] {1}", barcodesInfo[j].BarcodeType, barcodesInfo[j].Value));
}
}
// free resources
tiffImage.Dispose();
}
Wie kann ich Barcodes aus PDF Datei decodieren?Hier ist ein einfacher Code:
[VB.NET]
Private Shared Sub ReadBarcodesFromPdfDocument(ByVal fileName As String, ByVal barcodes As BarcodeType)
' open PDF document
Dim pdfImageViewer As New PdfImageViewer(fileName)
' create reader
Dim reader As New BarcodeReader()
reader.Settings.ScanBarcodeTypes = barcodes
' read barcodes from all pages
For i As Integer = 0 To pdfImageViewer.PageCount - 1
' get all images names from page i
Dim imageNames As String() = pdfImageViewer.GetImageNames(i)
' foreach images in page i
For k As Integer = 0 To imageNames.Length - 1
Console.WriteLine(String.Format("Page {0}, image {1}: ", i, imageNames(k)))
Dim barcodeImage As Image
' get image with name imageNames[k]
Try
barcodeImage = pdfImageViewer.GetImage(i, imageNames(k))
Catch e As Exception
' not supported image format
Console.WriteLine(e.Message)
Continue For
End Try
' read barcodes
Dim barcodesInfo As IBarcodeInfo() = reader.readBarcodes(barcodeImage)
' write information
If barcodesInfo.Length = 0 Then
Console.WriteLine("No barcodes found.")
Else
For j As Integer = 0 To barcodesInfo.Length - 1
Console.WriteLine(String.Format("[{0}] {1}", barcodesInfo(j).BarcodeType, barcodesInfo(j).Value))
Next
End If
Next
Next
' free resources
pdfImageViewer.Dispose()
End Sub
[C#]
static void ReadBarcodesFromPdfDocument(string fileName, BarcodeType barcodes)
{
// open PDF document
PdfImageViewer pdfImageViewer = new PdfImageViewer(fileName);
// create reader
BarcodeReader reader = new BarcodeReader();
reader.Settings.ScanBarcodeTypes = barcodes;
// read barcodes from all pages
for (int i = 0; i < pdfImageViewer.PageCount; i++)
{
// get all images names from page i
string[] imageNames = pdfImageViewer.GetImageNames(i);
// foreach images in page i
for (int k = 0; k < imageNames.Length; k++)
{
Console.WriteLine(string.Format("Page {0}, image {1}: ", i, imageNames[k]));
Image barcodeImage;
// get image with name imageNames[k]
try
{
barcodeImage = pdfImageViewer.GetImage(i, imageNames[k]);
}
catch(Exception e)
{
// not supported image format
Console.WriteLine(e.Message);
continue;
}
// read barcodes
IBarcodeInfo[] barcodesInfo = reader.ReadBarcodes(barcodeImage);
// write information
if (barcodesInfo.Length == 0)
{
Console.WriteLine("No barcodes found.");
}
else
{
for (int j = 0; j < barcodesInfo.Length; j++)
Console.WriteLine(string.Format("[{0}] {1}", barcodesInfo[j].BarcodeType, barcodesInfo[j].Value));
}
}
}
// free resources
pdfImageViewer.Dispose();
}
Wie kann ich Barkodes im PDF-Dokument in Vektor-Form schreiben?Hier ist ein Beispiel:
[VB.NET]
' Important: You need Vintasoft.Barcode.dll, Vintasoft.Imaging.dll, Vintasoft.Pdf.dll assemblies to run this code.
Private Shared Sub MarkPDF(ByVal pdfFilename As String)
' create barcodeWriter
Dim barcodeWriter As New BarcodeWriter()
' using DataMatrix 2D barcode
barcodeWriter.Settings.Barcode = BarcodeType.Code128
' barcode padding
Dim padding As Single = 5
' open PDF document
Dim document As New PdfDocument(pdfFilename)
' foreach pages
For i As Integer = 0 To document.Pages.Count - 1
Dim page As PdfPage = document.Pages(i)
' barcode value - page number
barcodeWriter.Settings.Value = (i + 1).ToString()
' write barcode graphics path
Dim barcodePath As GraphicsPath = barcodeWriter.GetBarcodeAsGraphicsPath()
' translate barcode to right-bottom page corner
Using m As New Matrix()
Dim barcodeWidth As Single = barcodePath.GetBounds().Width
m.Translate(page.MediaBox.Right - barcodeWidth - padding, padding)
barcodePath.Transform(m)
End Using
' fill barcode path
Using g As PdfGraphics = page.GetGraphics()
Dim brush As New PdfBrush(Color.Black)
g.FillPath(brush, barcodePath)
End Using
barcodePath.Dispose()
Next
' saving document
Dim resultFileName As String = Path.GetFileNameWithoutExtension(pdfFilename) & "_marked.pdf"
document.Save(Path.Combine(Path.GetDirectoryName(pdfFilename), resultFileName))
' free resources
document.Dispose()
End Sub
[C#]
// Important: You need Vintasoft.Barcode.dll, Vintasoft.Imaging.dll, Vintasoft.Pdf.dll assemblies to run this code.
static void MarkPDF(string pdfFilename)
{
// create barcodeWriter
BarcodeWriter barcodeWriter = new BarcodeWriter();
// using DataMatrix 2D barcode
barcodeWriter.Settings.Barcode = BarcodeType.DataMatrix;
// barcode padding
float padding = 5;
// open PDF document
PdfDocument document = new PdfDocument(pdfFilename);
// foreach pages
for (int i = 0; i < document.Pages.Count; i++)
{
PdfPage page = document.Pages[i];
// barcode value - page number
barcodeWriter.Settings.Value = (i + 1).ToString();
// write barcode graphics path
GraphicsPath barcodePath = barcodeWriter.GetBarcodeAsGraphicsPath();
// translate barcode to right-bottom page corner
using (Matrix m = new Matrix())
{
float barcodeWidth = barcodePath.GetBounds().Width;
m.Translate(page.MediaBox.Right - barcodeWidth - padding, padding);
barcodePath.Transform(m);
}
// fill barcode path
using (PdfGraphics g = page.GetGraphics())
{
PdfBrush brush = new PdfBrush(Color.Black);
g.FillPath(brush, barcodePath);
}
barcodePath.Dispose();
}
// saving document
string resultFileName = Path.GetFileNameWithoutExtension(pdfFilename) + "_marked.pdf";
document.Save(Path.Combine(Path.GetDirectoryName(pdfFilename), resultFileName));
// free resources
document.Dispose();
}
Wie kann ich meine Abstimmsumme in Barcode Leser/Schreiber nutzen?Sie müssen ReaderSettings.VerifyBarcodeMethod Eigenschaft nutzen um Barkode-Richtigkeit(Abstimmsumme) zu prüfen. Hier ist ein einfacher Code, der illustriert wie kann man Erstellen und Lesen Code 39 Barkodes mit Abstimmsumme an der Basis 1000:
[VB.NET]
' Generate checksum at base 1000.
Private Shared Function GenerateChecksum(ByVal value As String) As String
Dim checkSum As Integer = 0
For i As Integer = 0 To value.Length - 1
checkSum += CByte(AscW(value(i))) * i
checkSum = checkSum Mod 1000
Next
'result - [000..999]
Return checkSum.ToString().PadLeft(3, "0"c)
End Function
' Testing Checksum in barcode value.
Private Shared Function TestChecksum(ByVal barcodeValue As String) As Boolean
Dim value As String = barcodeValue.Substring(0, barcodeValue.Length - 3)
Dim readChecksum As String = barcodeValue.Substring(barcodeValue.Length - 3)
Return readChecksum = GenerateChecksum(value)
End Function
' Verify barcode method.
Private Shared Sub VerifyBarcodeMethod(ByVal reader As BarcodeReader, ByVal barcodeInfo As IBarcodeInfo)
If TestChecksum(barcodeInfo.Value) Then
barcodeInfo.Confidence = 100
Else
barcodeInfo.Confidence = 0
End If
End Sub
Private Shared Sub TestCode39Barcode(ByVal value As String)
' create writer
Dim writer As New BarcodeWriter()
writer.Settings.Barcode = BarcodeType.Code39
' create reader
Dim reader As New BarcodeReader()
reader.Settings.ScanBarcodeTypes = BarcodeType.Code39
reader.Settings.MinConfidence = 100
reader.Settings.AutomaticRecognition = True
reader.Settings.ExpectedBarcodes = 1
' write barcode without checksum
writer.Settings.Value = value
Dim barcodeNoChecksumImage As Image = writer.GetBarcodeAsBitmap()
' write barcode with checksum
writer.Settings.Value = value & GenerateChecksum(value)
Dim barcodeWithMyChecksumImage As Image = writer.GetBarcodeAsBitmap()
'set VerifyBarcodeMethod
reader.Settings.VerifyBarcodeMethod = AddressOf VerifyBarcodeMethod
Dim infos As IBarcodeInfo()
'read barcodes from barcode image without checksum
'no barcodes found
infos = reader.readBarcodes(barcodeNoChecksumImage)
Console.WriteLine("Scan (NoChecksum):")
For i As Integer = 0 To infos.Length - 1
Console.WriteLine(infos(i).Value)
Next
'read barcodes from barcode image with checksum
'found one barcode
infos = reader.readBarcodes(barcodeWithMyChecksumImage)
Console.WriteLine("Scan (MyChecksum):")
For i As Integer = 0 To infos.Length - 1
Console.WriteLine(infos(i).Value)
Next
End Sub
[C#]
// Generate checksum at base 1000.
static string GenerateChecksum(string value)
{
int checkSum = 0;
for (int i = 0; i < value.Length; i++)
{
checkSum += ((byte)value[i]) * i;
checkSum %= 1000;
}
//result - [000..999]
return checkSum.ToString().PadLeft(3, '0');
}
// Testing Checksum in barcode value.
static bool TestChecksum(string barcodeValue)
{
string value = barcodeValue.Substring(0, barcodeValue.Length - 3);
string readChecksum = barcodeValue.Substring(barcodeValue.Length - 3);
return readChecksum == GenerateChecksum(value);
}
// Verify barcode method.
static void VerifyBarcodeMethod(BarcodeReader reader, IBarcodeInfo barcodeInfo)
{
if (TestChecksum(barcodeInfo.Value))
barcodeInfo.Confidence = 100;
else
barcodeInfo.Confidence = 0;
}
static void TestCode39Barcode(string value)
{
// create writer
BarcodeWriter writer = new BarcodeWriter();
writer.Settings.Barcode = BarcodeType.Code39;
// create reader
BarcodeReader reader = new BarcodeReader();
reader.Settings.ScanBarcodeTypes = BarcodeType.Code39;
reader.Settings.MinConfidence = 100;
reader.Settings.AutomaticRecognition = true;
reader.Settings.ExpectedBarcodes = 1;
// write barcode without checksum
writer.Settings.Value = value;
Image barcodeNoChecksumImage = writer.GetBarcodeAsBitmap();
// write barcode with checksum
writer.Settings.Value = value + GenerateChecksum(value);
Image barcodeWithMyChecksumImage = writer.GetBarcodeAsBitmap();
//set VerifyBarcodeMethod
reader.Settings.VerifyBarcodeMethod = VerifyBarcodeMethod;
IBarcodeInfo[] infos;
//read barcodes from barcode image without checksum
//no barcodes found
infos = reader.ReadBarcodes(barcodeNoChecksumImage);
Console.WriteLine("Scan (NoChecksum):");
for (int i = 0; i < infos.Length; i++)
Console.WriteLine(infos[i].Value);
//read barcodes from barcode image with checksum
//found one barcode
infos = reader.ReadBarcodes(barcodeWithMyChecksumImage);
Console.WriteLine("Scan (MyChecksum):");
for (int i = 0; i < infos.Length; i++)
Console.WriteLine(infos[i].Value);
}
Wie kann ich Barkode mit bestimmten Größe und Auflösung generieren?
[VB.NET]
Private Shared Function DrawBarcode(ByVal barcode As BarcodeType, ByVal value As String, ByVal resolution As Single, _
ByVal width As Single, ByVal height As Single, ByVal units As UnitOfMeasure) As Image
Dim writer As New BarcodeWriter()
writer.Settings.Barcode = barcode
writer.Settings.Value = value
writer.Settings.Resolution = resolution
writer.Settings.SetWidth(width, units)
writer.Settings.SetHeight(height, units)
Return writer.GetBarcodeAsBitmap()
End Function
Private Shared Sub TestDrawBarcode(ByVal fileName As String)
' Draw barcode 6x2 cm in 600 DPI
Dim barcodeImage As Image = DrawBarcode(BarcodeType.Code128, "TESTBARCODE", 600, 6, 2, UnitOfMeasure.Centimeters)
barcodeImage.Save(fileName)
barcodeImage.Dispose()
End Sub
[C#]
static Image DrawBarcode(BarcodeType barcode, string value, float resolution, float width, float height, UnitOfMeasure units)
{
BarcodeWriter writer = new BarcodeWriter();
writer.Settings.Barcode = barcode;
writer.Settings.Value = value;
writer.Settings.Resolution = resolution;
writer.Settings.SetWidth(width, units);
writer.Settings.SetHeight(height, units);
return writer.GetBarcodeAsBitmap();
}
static void TestDrawBarcode(string fileName)
{
// Draw barcode 6x2 cm in 600 DPI
Image barcodeImage = DrawBarcode(BarcodeType.Code128, "TESTBARCODE", 600, 6, 2, UnitOfMeasure.Centimeters);
barcodeImage.Save(fileName);
barcodeImage.Dispose();
}
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