static void Main(string[] args)
{
int num = new Print532().OpenPrinter(11, 9600, 1);
Console.WriteLine(num == 0 ? "打印机联机 ..." : "打印机脱机 ...");
var wssv = new WebSocketServer(6690);
wssv.AddWebSocketService <App>("/app");
wssv.Start();
Console.WriteLine("Server starting, press any key to terminate the server.");
Console.ReadKey(true);
wssv.Stop();
}
private void TryOpenPrinter()
{
try
{
var printer = new Print532();
//打印机状态，发生任何错误打印机都将返回 -１
if (printer.RealtimeGetStatus(1) == -1)
{
Console.WriteLine("打印机故障，正在重新联机 ...");
if (printer.OpenPrinter(11, 9600, 1) == 0)
{
Console.WriteLine("打印机重新联机成功 ...");
}
else
{
throw new Exception("打印机已脱机 ...");
}
}
//打印机纸张状态
switch (printer.RealtimeGetStatus(4))
{
//纸张足够
case 18:
return;
//读取打印机状态失败
case -1:
//纸将尽检测器检测到纸张接近末端
case 30:
case 99:
case 114:
case 126:
throw new Exception("打印机缺纸 ...");
}
}
catch (Exception ex)
{
Console.WriteLine("打印机异常:" + ex.Message);
}
}
