Writing Barcodes

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  1. Start Visual Studio .NET.

  2. Start with the project that you created in Reading Barcodes Tutorial

  3. Drag and drop a new button in Form1. Change the following properties:

    Property Value
    Name writeBarcodeButton
    Text Write barcode
  4. Add the following code to writeBarcodeButton click procedure:

    [Visual Basic]

    
                 Private Sub writeBarcodeButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles writeBarcodeButton.Click
                    If theImage Is Nothing Then
                       Return
                    End If
                
                    ' Create a UPC A barcode
                    Dim data As New BarcodeData()
                    data.Symbology = BarcodeSymbology.UPCA
                    data.Value = "01234567890"
                    data.Bounds = New LogicalRectangle(10, 10, 600, 200, LogicalUnit.Pixel)
                
                    ' Setup the options to enable error checking and show the text on the bottom of the barcode
                    Dim options As New OneDBarcodeWriteOptions()
                    options.EnableErrorCheck = True
                    options.TextPosition = OneDBarcodeTextPosition.Default
                
                    Try
                       ' Write the barcode
                       barcodeEngineInstance.Writer.WriteBarcode(theImage, data, options)
                
                       ' Save the image
                       Dim dir As String = System.IO.Path.GetDirectoryName(imageFileName)
                       Dim name As String = System.IO.Path.GetFileNameWithoutExtension(imageFileName)
                        Dim saveFileName as String = System.IO.Path.Combine(dir, name + "_WriteBarcode.tif")
                
                       Using codecs As New RasterCodecs()
                          codecs.Save(theImage, saveFileName, RasterImageFormat.Tif, theImage.BitsPerPixel)
                       End Using
                
                       MessageBox.Show(String.Format("The barcode has been written and saved to {0}", saveFileName))
                    Catch ex As Exception
                       MessageBox.Show(ex.Message)
                    End Try
                 End Sub
                 
    

    [C#]

    
                 private void writeBarcodeButton_Click(object sender, EventArgs e)
                 {
                    if(theImage == null)
                    {
                       return;
                    }
                
                    // Create a UPC A barcode
                    BarcodeData data = new BarcodeData();
                    data.Symbology = BarcodeSymbology.UPCA;
                    data.Value = "01234567890";
                    data.Bounds = new LogicalRectangle(10, 10, 600, 200, LogicalUnit.Pixel);
                
                    // Setup the options to enable error checking and show the text on the bottom of the barcode
                    OneDBarcodeWriteOptions options = new OneDBarcodeWriteOptions();
                    options.EnableErrorCheck = true;
                    options.TextPosition = OneDBarcodeTextPosition.Default;
                
                    try
                    {
                       // Write the barcode
                       barcodeEngineInstance.Writer.WriteBarcode(theImage, data, options);
                
                       // Save the image
                       string dir = System.IO.Path.GetDirectoryName(imageFileName);
                       string name = System.IO.Path.GetFileNameWithoutExtension(imageFileName);
                       string saveFileName = System.IO.Path.Combine(dir, name + "_WriteBarcode.tif");
                
                       using(RasterCodecs codecs = new RasterCodecs())
                       {
                          codecs.Save(theImage, saveFileName, RasterImageFormat.Tif, theImage.BitsPerPixel);
                       }
                
                       MessageBox.Show(string.Format("The barcode has been written and saved to {0}", saveFileName));
                    }
                    catch(Exception ex)
                    {
                       MessageBox.Show(ex.Message);
                    }
                 }
                 
    
  5. Build, and Run the program to test it. Click "Load Image" to load the image and "Write Barcode" to write a 1D UPC A barcode to the image and save it.

 

 


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