使用 C# 按下 Datalogic 存储设备上的扫描按钮时的替代事件

Question

我正在使用 C# 2003 作为 Datalogic Memor 应用程序。我研究过，按下设备的“扫描按钮”时会触发 KeyPress 事件。捕获它是 if(e.KeyChar == 13) 但它不起作用。还有其他选择吗？

Answer 1

尝试安装 Datalogic SDK 2_0_0_0
您可以从 Datalogic得利捷 网站。

然后添加对 datalogic API 的引用：

C:\Program Files\Microsoft.NET\SDK\CompactFramework\v3.5\WindowsCE\Datalogic.API.dll

现在您可以通过以下方式使用 API：

在您的表单声明上： 在

private DecodeEvent dcdEvent;
private DecodeHandle hDcd;

您的表单加载事件上：

// Attempt to load a handle to the decoder.

try
{
    hDcd = new DecodeHandle(DecodeDeviceCap.Exists | DecodeDeviceCap.Barcode);
}
catch(DecodeException)
{
    MessageBox.Show("Exception loading barcode decoder.", "Decoder Error");
    return;
}

// Now that we've got a connection to a barcode reading device, assign a
// method for the DcdEvent.  A recurring request is used so that we will
// continue to get barcode data until our dialog is closed.
DecodeRequest reqType = (DecodeRequest)1 | DecodeRequest.PostRecurring;

// Initialize all events possible
//dcdEvent = new DecodeEvent(hDcd, reqType);
dcdEvent = new DecodeEvent(hDcd, reqType, this);
dcdEvent.Scanned += new DecodeScanned(dcdEvent_Scanned);

这是您的事件侦听器：

private void dcdEvent_Scanned(object sender, DecodeEventArgs e)
{
    CodeId cID = CodeId.NoData;
    string dcdData = string.Empty;
    // Obtain the string and code id.
    try
    {
        dcdData = hDcd.ReadString(e.RequestID, ref cID);
    }
    catch(Exception)
    {
        MessageBox.Show("Error reading string!");
        return;
    }

    string result = "Barcode Text: " + dcdData;
    result +=" AND Barcode Code Id : " + cID.ToString();
    MessageBox.Show(result);
}

在您的表单关闭事件上：

if(dcdEvent.IsListening)
{
    dcdEvent.StopScanListener();
}

if (hDcd != null)
{
    hDcd.Dispose();
} 

Answer 2

对于 Datalogic Memor X3，我像这样使用 DLScannerListener：

DLScanner Scanner = new DLScanner();
Scanner.init();
Scanner.scanEnable();
Scanner.Listeners += new DLScannerListener(scanner_notify);

然后我在方法 scanner_notify 中执行逻辑

private void scanner_notify(DLScannerEvent scannerEvent, DLScanner sender)
{
    //Write your code here
}