private async Task print(IPAddress ip, BmpInfo bmpInfo)
{
TcpClientInfo client = IPClientBmpMap[ip].TcpClientInfo;
try {
OnLog?.Invoke(ip, bmpInfo.bmp, $"正在尝试打印", LogLevel.Info);
NetworkStream stream = client.Client.GetStream();
// 写入打印数据流
await stream.WriteAsync(bmpInfo.printingBytes, 0, bmpInfo.printingBytes.Length);
lock (IPClientBmpMap) {
client.IdleTime = 0;
IPClientBmpMap[ip].Queue.Dequeue();
}
OnLog?.Invoke(ip, bmpInfo?.bmp, "打印成功", LogLevel.Success);
await prePrint(ip);
}
catch (Exception e) {
OnLog?.Invoke(ip, null, $"写入数据发生错误 {e.Message}", LogLevel.Error);
lock (IPClientBmpMap) {
closeIP(ip);
}
OnLog?.Invoke(ip, null, "重新尝试连接", LogLevel.Info);
await Connect(ip);
}
}
public async Task Print(IPAddress ip, Bitmap bmp, int colorDepth)
{
await Task.Run(async() => {
BmpInfo bmpInfo = null;
// 获得需要打印的图片数据
bmpInfo = new BmpInfo {
bmp = bmp,
printingBytes = await getPrintingBytes(bmp, colorDepth)
};
lock (IPClientBmpMap) {
addIP(ip);
IPClientBmpMap[ip].Queue.Enqueue(bmpInfo);
OnLog?.Invoke(ip, bmpInfo?.bmp, "已进入打印队列", LogLevel.Success);
// 如果正在打印则不做任何操作, 队列中的数据会自动打印
if (IPClientBmpMap[ip].IsPrinting)
{
return;
}
IPClientBmpMap[ip].IsPrinting = true;
}
await prePrint(ip);
});
}