Take the following steps to start a project:

1. Start Visual Studio .NET.
2. Choose File->New->Project… from the menu.
3. In the New Project dialog box, Choose either "Visual C# Projects" or "Visual Basic Projects" in the Projects Type List, and choose "Windows Application " in the Templates List.
4. Type the project name as "ReadingBarcodes" in the Project Name field, and then choose OK. If desired, type a new location for your project or select a directory using the Browse button, and then choose OK.
5. In the "Solution Explorer" window, right-click on the "References" folder, and select "Add Reference…" from the context menu. In the Add Reference dialog box, select the ".NET" tab and browse to the "LEAD Technologies\LEADTOOLS 17\Bin\DotNet\Win32" folder and select the following DLLs:
   • Leadtools.dll
   • Leadtools.Barcode.dll
   • Leadtools.Barcode.OneD.dll
   • Leadtools.Drawing.dll
   • Leadtools.Codecs.dll
   • Leadtools.Codecs.Tif.dll
   • Leadtools.Codecs.Fax.dll
   Click the Select button and then press the OK button to add the above DLLs to the application.
6. Switch to Form1 code view (right-click Form1 in the solution explorer then select View Code ) and add the following lines at the beginning of the file:

   [Visual Basic]

                
               Imports Leadtools
               Imports Leadtools.Codecs
               Imports Leadtools.Barcode
               Imports Leadtools.Drawing
               
   

   [C#]

                
               using Leadtools;
               using Leadtools.Codecs;
               using Leadtools.Barcode;
               using Leadtools.Drawing;
               
   

7. Drag and drop two buttons in Form1. Change the following properties: Property Value: Name: btnLoadImage Text: Load Image Name: btnReadBarCode Text: Read Bar Code
8. Add an event handler to the Form1 Load event and add the following code

   Visual Basic

               Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
                  ' Note that this is a sample key, which will not work in your toolkit
                  RasterSupport.Unlock(Leadtools.RasterSupportType.Barcodes1D, "TestKey")
                  _barEngine = New BarcodeEngine()
                  _codecs = New RasterCodecs()
               End Sub
               
   

   C#

               private void Form1_Load(object sender, EventArgs e)
               {
                  // Note that this is a sample key, which will not work in your toolkit
                  RasterSupport.Unlock(Leadtools.RasterSupportType.Barcodes1D, "TestKey");
                  _barEngine = new BarcodeEngine();
                  _codecs = new RasterCodecs();
               }
               
   

9. Add the following private variables to Form1 class:

   Visual Basic

               Dim _image As RasterImage
               Dim _barEngine As BarcodeEngine
               Dim _codecs As RasterCodecs
               Dim _readBarData As RasterCollection(Of BarcodeData)
               
   

   C#

               RasterImage _image;
               BarcodeEngine _barEngine;
               RasterCodecs _codecs;
               RasterCollection<BarcodeData> _readBarData;
               
   

10. Add the following code for the btnLoadImage control’s click procedure:

    Visual Basic

                Private Sub btnLoadImage_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLoadImage.Click
                   _image = _codecs.Load("C:\Users\Public\Documents\LEADTOOLS Images\barcode1.tif")
                End Sub
                
    

    C#

                private void btnLoadImage_Click(object sender, EventArgs e)
                {
                   _image = _codecs.Load(@"C:\Users\Public\Documents\LEADTOOLS Images\barcode1.tif");
                }
                
    

11. Add the following code for the btnReadBarCode control’s click procedure:

    Visual Basic

                Private Sub btnReadBarCode_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnReadBarCode.Click
                   Dim searchRect As LeadRect = New LeadRect(0, 0, 0, 0)
                   Dim bar1d As Barcode1d = New Barcode1d()
                   bar1d.ErrorCheck = True
                   bar1d.Granularity = 9
                   bar1d.Direction = BarcodeDirectionFlags.LeftToRight
                   Dim barRPdf As BarcodeReadPdf = New BarcodeReadPdf()
                   barRPdf.Direction = BarcodeDirectionFlags.LeftToRight
                   Dim barColor As BarcodeColor = New BarcodeColor()
                   barColor.BarColor = RasterColorConverter.FromColor(Color.Black)
                   barColor.SpaceColor = RasterColorConverter.FromColor(Color.White)
                   Try
                      ' The Read method will search for all linear barcodes in the whole bitmap
                      _readBarData = _barEngine.Read(_image, _
                                                     searchRect, _
                                                     BarcodeSearchTypeFlags.Barcode1dReadAnyType, _
                                                     BarcodeUnit.ScanlinesPerPixels, _
                                                     BarcodeReadFlags.None, _
                                                     0, _
                                                     bar1d, _
                                                     barRPdf, _
                                                     barColor)
                      Dim count As Integer = _readBarData.Count
                      Dim i As Integer
                      For i = 0 To count - 1
                         Dim data As BarcodeData = _readBarData(i)
                         Dim barDataMsg As String = String.Format("Barcode Data = {0}\nType = {1}\nLeft = {2}\nTop = {3}\nRight = {4}\nBottom = {5}\n", _
                                                           BarcodeData.ConvertToStringArray(data.Data), _
                                                           data.SearchType, _
                                                           data.Location.Left, _
                                                           data.Location.Top, _
                                                           data.Location.Right, _
                                                           data.Location.Bottom)
                         MessageBox.Show(Me, barDataMsg)
                      Next
                   Catch ex As Exception
                      MessageBox.Show(Me, ex.Message)
                   End Try
                End Sub
                
    

    C#

                private void btnReadBarCode_Click(object sender, EventArgs e)
                {
                   LeadRect searchRect = new LeadRect(0, 0, 0, 0);
                   Barcode1d bar1d = new Barcode1d();
                   bar1d.ErrorCheck = true;
                   bar1d.Granularity = 9;
                   bar1d.Direction = BarcodeDirectionFlags.LeftToRight;
                   BarcodeReadPdf barRPdf = new BarcodeReadPdf();
                   barRPdf.Direction = BarcodeDirectionFlags.LeftToRight;
                   BarcodeColor barColor = new BarcodeColor();
                   barColor.BarColor = RasterColorConverter.FromColor(Color.Black);
                   barColor.SpaceColor = RasterColorConverter.FromColor(Color.White);
                   try
                   {
                      // The Read method will search for all linear barcodes in the whole bitmap
                      _readBarData = _barEngine.Read(_image,
                                                     searchRect,
                                                     BarcodeSearchTypeFlags.Barcode1dReadAnyType,
                                                     BarcodeUnit.ScanlinesPerPixels,
                                                     BarcodeReadFlags.None,
                                                     0,
                                                     bar1d,
                                                     barRPdf,
                                                     barColor);
                      int count = _readBarData.Count;
                      for (int i=0; i<count; i++)
                      {
                         BarcodeData data = _readBarData[i];
                         string barDataMsg = string.Format("Barcode Data = {0}\nType = {1}\nLeft = {2}\nTop = {3}\nRight = {4}\nBottom = {5}\n",
                                                           BarcodeData.ConvertToStringArray(data.Data),
                                                           data.SearchType,
                                                           data.Location.Left,
                                                           data.Location.Top,
                                                           data.Location.Right,
                                                           data.Location.Bottom);
                         MessageBox.Show(this, barDataMsg);
                      }
                   }
                   catch (Exception ex)
                   {
                      MessageBox.Show(this, ex.Message);
                   }
                }
                
    

12. Build, and Run the program to test it. Click "Load Image" to load the image and "Read Barcode" to recognize and display the barcode data.

 

 

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