需要帮助=使用类条码扫描

Question

我从摩托罗拉这个代码，可以在Windows-CE scann条码

它做工精良，但如何让我的所有形式可以

任何工作类这台扫描仪？

扫描仪类：

using System; 
using System.Data; 
using System.IO; 
using System.Windows.Forms; 


namespace MyScann 
{ 
    /// <summary> 
    /// Summary description for Scanner. 
    /// </summary> 
    public class Scanner 
    { 

     public static Symbol.Barcode.Reader SymbolReader = null; 
     public static Symbol.Barcode.ReaderData SymbolReaderData = null; 
     public static System.EventHandler SymbolEventHandler = null; 
     public static DataSet CodeDataSet; 


     //public static Utils.Sound ReadErrorSound; 

     public static bool ScannerEnabled = false; 
     public static void ActivateScanner() 
     { 

      // If we have both a reader and a reader-data Object 
      if (Scanner.SymbolReader != null && 
       Scanner.SymbolReaderData != null && 
       ! Scanner.SymbolReaderData.IsPending) 
      { 
       // Submit 'Read' 
       try 
       { 
        Scanner.SymbolReader.Actions.Read(Scanner.SymbolReaderData); 
       } 
       catch (Exception err) 
       { 
        MessageBox.Show(err.Message); 
        if (err.InnerException != null) 
         MessageBox.Show(err.InnerException.Message); 
       } 
      } 

     } 

     public static void DeactivateScanner() 
     { 

      // If we have both a reader and a reader-data Object 
      if (Scanner.SymbolReader != null && 
       Scanner.SymbolReaderData != null && 
       Scanner.SymbolReaderData.IsPending) 
      { 
       // Submit 'CancelRead' 
       try 
       { 
        Scanner.SymbolReader.Actions.CancelRead(Scanner.SymbolReaderData); 
       } 
       catch (Exception err) 
       { 
        MessageBox.Show(err.Message); 
        if (err.InnerException != null) 
         MessageBox.Show(err.InnerException.Message); 
       } 
      } 

     } 

     /// <summary> 
     /// Initialize the reader. 
     /// </summary> 
     /// <returns>False if an error accurs</returns> 
     public static bool InitSymbolReader() 
     { 

      // If reader is already present then fail initialize 
      if (SymbolReader != null) 
      { 
       return false; 

      } 

      // Create new reader, first available reader will be used. 
      SymbolReader = new Symbol.Barcode.Reader(); 
      // Create reader data 
      SymbolReaderData = new Symbol.Barcode.ReaderData(
       Symbol.Barcode.ReaderDataTypes.Text, 
       Symbol.Barcode.ReaderDataLengths.DefaultText); 


      // set scanner read error sound 
      //ReadErrorSound = new Utils.Sound(ErrorSound); 

      return true; 
     } 

     /// <summary> 
     /// Stop reading and disable/close reader 
     /// </summary> 
     public static void DeinitSymbolReader() 
     { 
      try 
      { 
       // If we have a reader 
       if (SymbolReader != null) 
       { 
        // Disable the reader 
        SymbolReader.Actions.Disable(); 

        // Free it up 
        SymbolReader.Dispose(); 

        // Indicate we no longer have one 
        SymbolReader = null; 
       } 

       // If we have a reader data 
       if (SymbolReaderData != null) 
       { 
        // Free it up 
        SymbolReaderData.Dispose(); 

        // Indicate we no longer have one 
        SymbolReaderData = null; 
       } 
      } 
      catch {} 
     } 

     /// <summary> 
     /// Enable most barcode type with no limitation on length 
     /// </summary> 
     public static void OpenAllBarcodes() 
     { 
      SymbolReader.Decoders.CODABAR.Enabled = true; 
      SymbolReader.Decoders.CODABAR.MinimumLength = 0; 
      SymbolReader.Decoders.CODABAR.MaximumLength = 0; 

      SymbolReader.Decoders.CODE11.Enabled = true; 
      SymbolReader.Decoders.CODE11.MinimumLength = 0; 
      SymbolReader.Decoders.CODE11.MaximumLength = 0; 

      SymbolReader.Decoders.CODE39.Enabled = true; 
      SymbolReader.Decoders.CODE39.MinimumLength = 0; 
      SymbolReader.Decoders.CODE39.MaximumLength = 0; 

      SymbolReader.Decoders.CODE93.Enabled = true; 
      SymbolReader.Decoders.CODE93.MinimumLength = 0; 
      SymbolReader.Decoders.CODE93.MaximumLength = 0; 

      SymbolReader.Decoders.CODE128.Enabled = true; 
      SymbolReader.Decoders.CODE128.MinimumLength = 0; 
      SymbolReader.Decoders.CODE128.MaximumLength = 0; 

      SymbolReader.Decoders.DATAMATRIX.Enabled = true; 
      SymbolReader.Decoders.DATAMATRIX.MinimumLength = 0; 
      SymbolReader.Decoders.DATAMATRIX.MaximumLength = 0; 

      SymbolReader.Decoders.D2OF5.Enabled = true; 
      SymbolReader.Decoders.D2OF5.MinimumLength = 0; 
      SymbolReader.Decoders.D2OF5.MaximumLength = 0; 

      SymbolReader.Decoders.I2OF5.Enabled = true; 
      SymbolReader.Decoders.I2OF5.MinimumLength = 0; 
      SymbolReader.Decoders.I2OF5.MaximumLength = 0; 

      SymbolReader.Decoders.EAN13.Enabled = true; 
      SymbolReader.Decoders.EAN13.MinimumLength = 0; 
      SymbolReader.Decoders.EAN13.MaximumLength = 0; 

      SymbolReader.Decoders.EAN8.Enabled = true; 
      SymbolReader.Decoders.EAN8.MinimumLength = 0; 
      SymbolReader.Decoders.EAN8.MaximumLength = 0; 

      SymbolReader.Decoders.PDF417.Enabled = true; 
      SymbolReader.Decoders.PDF417.MinimumLength = 0; 
      SymbolReader.Decoders.PDF417.MaximumLength = 0; 

      SymbolReader.Decoders.UPCA.Enabled = true; 
      SymbolReader.Decoders.UPCA.MinimumLength = 0; 
      SymbolReader.Decoders.UPCA.MaximumLength = 0; 

      SymbolReader.Decoders.UPCE1.Enabled = true; 
      SymbolReader.Decoders.UPCE1.MinimumLength = 0; 
      SymbolReader.Decoders.UPCE1.MaximumLength =0; 

      SymbolReader.Decoders.UPCE0.Enabled = true; 
      SymbolReader.Decoders.UPCE0.MinimumLength = 0; 
      SymbolReader.Decoders.UPCE0.MaximumLength = 0; 





      SymbolReader.Parameters.CodeIdType = Symbol.Barcode.CodeIdTypes.None; 
      SymbolReader.Parameters.ScanType = Symbol.Barcode.ScanTypes.Background; 
      SymbolReader.Parameters.LocalFeedback = Symbol.Barcode.DisabledEnabled.Enabled; 

      Scanner.SymbolReader.Parameters.Feedback.Success.BeepTime = 0; 
     } 







    } 
} 

我在我的形式使用：

public void InitScanner(byte BatteryLevel) 
     { 

      // Create event handler delegate 
      if (Scanner.SymbolEventHandler == null) 
      { 
       Scanner.SymbolEventHandler = new EventHandler(this.SymbolReader_ReadNotify); 
       // Enable reader, with wait cursor 
       Scanner.SymbolReader.Actions.Enable(); 
       Scanner.OpenAllBarcodes(); 
       Scanner.ScannerEnabled = true; 
      } 
      // If we have both a reader and a reader data 
      if ((Scanner.SymbolReader != null) && 
       (Scanner.SymbolReaderData != null)) 
      { 
       // Submit a read 
       Scanner.SymbolReader.ReadNotify += Scanner.SymbolEventHandler; 
       Scanner.SymbolReader.Actions.Read(Scanner.SymbolReaderData); 
      } 
     } 

     public void SymbolReader_ReadNotify(object sender, EventArgs e) 
     { 
      Symbol.Barcode.ReaderData TheReaderData = Scanner.SymbolReader.GetNextReaderData(); 
      if (TheReaderData.Result == Symbol.Results.SUCCESS && (txtBarcode.Focused == true)) 
      { 
       if (txtBarcode.Focused == true) 
       { 
        txtBarcode.Text = TheReaderData.Text.ToString(); 
        SymbolReader_CycleScannerReader(); 
        return; 
       } 
      } 
      SymbolReader_CycleScannerReader(); 
     } 

     public void SymbolReader_CycleScannerReader() 
     { 
      Scanner.SymbolReader.Actions.Read(Scanner.SymbolReaderData); 
     } 

     public void StartScanner() 
     { 
      bool flag = false; 
      try 
      { 
       Scanner.SymbolEventHandler = null; 
       Scanner.DeinitSymbolReader(); 
       Scanner.ScannerEnabled = false; 
       if (!Scanner.ScannerEnabled) 
       { 
        Scanner.SymbolEventHandler = null; 
        Scanner.InitSymbolReader(); 
        InitScanner(100); 
        flag = true; 
       } 
      } 
      catch 
      { 
       Scanner.SymbolEventHandler = null; 
       Scanner.InitSymbolReader(); 
       InitScanner(100); 
       flag = true; 
      } 
      finally 
      { 
       if (!flag) 
       { 
        MessageBox.Show("Scanner Error"); 
       } 
      } 
     } 

     public void CloseScanner() 
     { 
      Scanner.SymbolEventHandler = null; 
      Scanner.DeinitSymbolReader(); 
     } 

在 public Main()

我使用StartScanner();

，并在程序结束时，我用：CloseScanner();

我读了0条形码在我的形式

在此先感谢

Answer 1

没有给出确切的答案我们的办公室来了，这里有我们做了什么伪代码。同样，手持式扫描仪设备具有内置的扫描和识别不同条形码格式的功能。所以，我们所做的就是将扫描代码包装到我们的表格中......类似于

public class OurForm : Form 
{ 
    protected MyScannerClass oScanner 

    public OurForm() 
    { 
     // create your class no matter what form uses it (subclass from this class) 
     oScanner = new MyScannerClass(); 

     // Now, force registration of your "scanning" event to pass the incoming 
     // string to THIS form's NewScan event. 
     oScanner.OnYourScannerScanEvent += NewScan(); 

    } 

    // Now, this being a VIRTUAL, you can OVERRIDE this on each specific form and 
    // parse/interpret the data as needed... based on the specific field user is in, 
    // type of code (Code39, PDF417 (2d barcode), etc) 
    protected void NewScan(string StringParameterFromScannerHandler, otherParm ofScanType) 
    { 
     // do whatever cleanup/pre-validation that may be common to ALL forms you use... 
     // THEN pass on to secondary method to actually be overridden specific to each form 
     FormSpecificHandler(StringParameterFromScannerHandler, ofScanType); 
    } 

    protected virtual void FormSpecificHandler( 
     string StringParameterFromScannerHandler, 
     otherParm ofScanType) 
    { 


    } 


public class YourSubForm : OurForm 
{ 
    protected override void FormSpecificHandler( 
     string StringParameterFromScannerHandler, 
     otherParm ofScanType) 
    { 
     if(YourCurrentField == Something and ofScanType = PDF417) 
     { 
      // do whatever with your scan results... 
     } 
    } 
}