自己写的wince平台下调用mc3100PDA扫描程序。可是实现连续扫描

短命女 2022-05-23 02:56 119阅读 0赞

摩托罗拉的MC3100的扫描读取条形码功能做的比较呆瓜。没有现在其他读取条形码PDA方便。MC3100的扫描读取条形码功能居然要自己调用官方的dll。之后把扫描结果保存在textbox或者txt等等中。代码如下：

需要引用：

using Symbol.Barcode;  
using Symbol;

核心代码：

/// <summary>  
        /// 定义一个读取器  
        /// </summary>  
        public Reader MyReader \{ get; set; \}  
  
        /// <summary>  
        /// 定义一个存储读取数据的介质  
        /// </summary>  
        public ReaderData MyReaderData \{ get; set; \}  
  
        /// <summary>  
        /// 定义委托  
        /// </summary>  
        public EventHandler MyEventHandler \{ get; set; \}  
  
        /// <summary>  
        /// 获取到信息不需要通知  
        /// </summary>  
        public bool IsReadNotificationAttached \{ get; set; \}  
  
        /// <summary>  
        /// 定义消息  
        /// </summary>  
        public string Message \{ get; set; \}  
  
        public delegate void UpdateUiDelegate();  
  
        /// <summary>  
        /// 扫描并把数据保存到textbox  
        /// </summary>  
        private void Scanning()  
        \{  
            if (InitReader())  
            \{  
                StartRead();  
            \}  
            else  
            \{  
                base.Close();  
            \}  
        \}  
  
        /// <summary>  
        /// 初始化扫描器  
        /// </summary>  
        /// <returns></returns>  
        private bool InitReader()  
        \{  
            if (this.MyReader != null)  
            \{  
                return false;  
            \}  
            try  
            \{  
                if (Symbol.Barcode.Device.AvailableDevices.Length <= 1)  
                \{  
                    this.MyReader = new Symbol.Barcode.Reader();  
                \}  
                this.MyReaderData = new ReaderData(ReaderDataTypes.Text, ReaderDataLengths.MaximumLabel);  
                this.MyEventHandler = new EventHandler(this.MyReader\_ReadNotify);  
                this.MyReader.Actions.Enable();  
                this.MyReader.Parameters.Feedback.Success.BeepTime = 0;  
                this.MyReader.Parameters.Feedback.Success.WaveFile = @"\\windows\\alarm3.wav";  
                base.Activated += new EventHandler(this.ReaderFormActivated);  
                base.Deactivate += new EventHandler(this.ReaderFormDeactivate);  
                return true;  
            \}  
            catch (Exception ex)  
            \{  
                //这里需要记录日志  
                Message = "InitReader方法出现问题：" + ex.Message;  
                return false;  
            \}  
        \}  
  
        /// <summary>  
        /// 委托读取数据  
        /// </summary>  
        /// <param name="sender"></param>  
        /// <param name="e"></param>  
        private void MyReader\_ReadNotify(object sender, EventArgs e)  
        \{  
            var TheReaderData = this.MyReader.GetNextReaderData();  
            if (TheReaderData.Result == Results.SUCCESS)  
            \{  
                this.HandleData(TheReaderData);  
                this.StartRead();  
            \}  
            else  
            \{  
                string sMsg = "Read Failed\\nResult = " + TheReaderData.Result.ToString();  
                this.Message = sMsg;  
                if (TheReaderData.Result == Results.E\_SCN\_READINCOMPATIBLE)  
                \{  
                    sMsg = "The application will now exit.";  
                    this.Message = sMsg;  
                    base.Close();  
                \}  
            \}  
        \}  
  
        /// <summary>  
        /// 根据保存器中的数据循环赋值给textbox  
        /// </summary>  
        /// <param name="theReaderData"></param>  
        private void HandleData(Symbol.Barcode.ReaderData theReaderData)  
        \{  
            foreach (Control c in base.Controls)  
            \{  
                if ((c is TextBox) && c.Focused)  
                \{  
                    var tb = (TextBox)c;  
                    tb.Text = theReaderData.Text;  
                    base.SelectNextControl(tb, true, true, true, true);  
                \}  
            \}  
        \}  
  
        /// <summary>  
        /// 开始扫描  
        /// </summary>  
        private void StartRead()  
        \{  
            if ((this.MyReader != null) && (this.MyReaderData != null))  
            \{  
                try  
                \{  
                    if (!this.IsReadNotificationAttached)  
                    \{  
                        this.MyReader.ReadNotify += this.MyEventHandler;  
                        this.IsReadNotificationAttached = true;  
                    \}  
                    this.MyReader.Actions.Read(this.MyReaderData);  
                \}  
               catch(Exception ex)  
               \{  
                   //这里需要记录日志  
                   Message = "StartRead方法出错：" + ex.Message;  
               \}  
            \}  
        \}  
  
  
        private void ReaderFormActivated(object sender, EventArgs e)  
        \{  
            if (!this.MyReaderData.IsPending)  
            \{  
                this.StartRead();  
            \}  
        \}  
  
        /// <summary>  
        /// 扫描窗体  
        /// </summary>  
        /// <param name="sender"></param>  
        /// <param name="e"></param>  
        private void ReaderFormDeactivate(object sender, EventArgs e)  
        \{  
            this.StopRead();  
        \}  
  
        /// <summary>  
        /// 停止扫描  
        /// </summary>  
        private void StopRead()  
        \{  
            if (this.MyReader != null)  
            \{  
                try  
                \{  
                    if (this.IsReadNotificationAttached)  
                    \{  
                        this.MyReader.ReadNotify -= this.MyEventHandler;  
                        this.IsReadNotificationAttached = false;  
                    \}  
                    this.MyReader.Actions.Flush();  
                \}  
               catch(Exception ex)  
               \{  
                   Message = "StopRead方法出错，出错信息是：" + ex.Message;  
               \}  
            \}  
        \}

在调用的时候只需要用到：

/// <summary>  
        /// 加载扫描  
        /// </summary>  
        /// <param name="sender"></param>  
        /// <param name="e"></param>  
        private void SendProduct\_Load(object sender, EventArgs e)  
        \{  
            txtExpress.Text = FormBase.ExpressName;  
            txtOrderId.Focus();  
            Scanning();  
  
        \}

完事