protected override void OnOpen()
{
Console.WriteLine("opened");
WsResponse <string> r = new WsResponse <string>();
r.Data = "连接成功";
string msg = JsonConvert.SerializeObject(r);
Send(msg);
}
protected void printHtml(string seq, string html)
{
WsResponse <string> r = new WsResponse <string>();
r.Seq = seq;
r.Data = "暂不支持HTML";
string msg = JsonConvert.SerializeObject(r);
Send(msg);
}
/// <summary>
/// 打印
/// </summary>
/// <param name="seq">序号，用于区分回调</param>
/// <param name="printerName">打印机，如果不指定，则使用画面上的打印机</param>
/// <param name="imageList">待打印图片列表</param>
protected void printImage(string seq, string printer, List <KeyValuePair <string, string> > imageList)
{
// 根据名称获取对应打印机
PrinterSetting printerSetting = null;
foreach (PrinterSetting ps in PrintSetting.Printers)
{
if (String.IsNullOrEmpty(printer) && ps.IsDefault)
{
printerSetting = ps;
break;
}
if (ps.ID == printer || ps.Printer == printer)
{
printerSetting = ps;
break;
}
}
if (printerSetting == null)
{
// 未找到指定打印机
return;
}
// 设置打印时不再弹打印进度弹窗
PrintController printController = new StandardPrintController();
PrintDocument printDoc = new PrintDocument();
printDoc.DefaultPageSettings.Landscape = printerSetting.Landscape;
printDoc.PrinterSettings.PrinterName = printerSetting.Printer;
printDoc.PrinterSettings.Copies = 1;
//if (!String.IsNullOrEmpty(seq)) {
// printDoc.PrinterSettings.PrintFileName = seq;
//}
// printDoc.OriginAtMargins = true;
printDoc.PrintController = printController;
// 开始打印事件
printDoc.BeginPrint += (object sender, PrintEventArgs e) =>
{
Logger.InfoLog("print begin" + seq);
WsResponse <string> br = new WsResponse <string>();
br.Seq = seq;
br.Data = "begin";
Send(JsonConvert.SerializeObject(br));
};
// 结束打印事件
printDoc.EndPrint += (object sender, PrintEventArgs e) =>
{
Logger.InfoLog("print end " + seq);
WsResponse <string> er = new WsResponse <string>();
er.Seq = seq;
er.Data = "end";
Send(JsonConvert.SerializeObject(er));
};
int page = 1;
// 打印，每一页执行一次该事件
printDoc.PrintPage += (object sender, PrintPageEventArgs e) =>
{
// inch
int x = toInchX100(printerSetting.MarginLeft);
int y = toInchX100(printerSetting.MarginTop);
// inch
int xr = toInchX100(printerSetting.MarginRight);
int yb = toInchX100(printerSetting.MarginBottom);
int w = 300, h = 551;
switch (printerSetting.Paper)
{
case "1":
{
w = 300; // 285; // 300* 0.95
h = 511; // 485; // 511 * 0.95
break;
}
case "2":
{
w = toInchX100(100);
h = toInchX100(180);
break;
}
case "3":
default:
{
w = toInchX100(100);
h = toInchX100(180);
}
break;
}
e.PageSettings.Margins.Left = 0;
e.PageSettings.Margins.Top = 0;
e.PageSettings.Margins.Bottom = 0;
e.PageSettings.Margins.Right = 0;
e.PageSettings.PaperSize = new PaperSize("自定义", w, h);
//foreach (KeyValuePair<string, string> image in imageList)
//{
KeyValuePair <string, string> image = imageList[page - 1];
// Image i = Image.FromFile(image);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(image.Value);
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse()) //获得响应)
{
if (response.StatusCode != HttpStatusCode.OK)
{
WsResponse <KeyValuePair <string, string> > rerr = new WsResponse <KeyValuePair <string, string> >();
rerr.Seq = seq;
rerr.Code = "NET_ERR";
rerr.Data = new KeyValuePair <string, string>(image.Key, "error:" + response.StatusCode);
string msgerr = JsonConvert.SerializeObject(rerr);
Send(msgerr);
}
else
{
using (Stream stream = response.GetResponseStream())
{
Image img = Image.FromStream(stream);///实例化,得到img
// Conole.wrimg.Width img.Height
Console.WriteLine(img.Width + "x" + img.Height);
Console.WriteLine(e.PageSettings.HardMarginX + "x" + e.PageSettings.HardMarginY);
if (printerSetting.AutoSize)
{
// e.MarginBounds
e.MarginBounds.Offset(0, 0);
//Console.WriteLine(e.MarginBounds);
//Rectangle rect = new Rectangle(x, y, w - x - xr, h - y - yb);
//e.Graphics.DrawImage(img, rect);
e.Graphics.DrawImage(img, e.MarginBounds);
}
else
{
e.MarginBounds.Offset(0, 0);
e.Graphics.DrawImage(img, e.PageSettings.HardMarginX + x, e.PageSettings.HardMarginY + y, w, h);
}
}
Logger.InfoLog("print printed" + image.Key + " data:" + image.Value);
WsResponse <KeyValuePair <string, string> > rimage = new WsResponse <KeyValuePair <string, string> >();
rimage.Seq = seq;
rimage.Data = new KeyValuePair <string, string>(image.Key, "printed");
string msgImage = JsonConvert.SerializeObject(rimage);
Send(msgImage);
}
}
//}
if (page < imageList.Count)
{
// 表示还有下一页，
e.HasMorePages = true;
}
else
{
e.HasMorePages = false;
}
page++;
};
printDoc.Print();
WsResponse <string> r = new WsResponse <string>();
r.Seq = seq;
r.Data = "printed";
string msg = JsonConvert.SerializeObject(r);
Send(msg);
}
protected override void OnMessage(MessageEventArgs e)
{
WsCommand command = JsonConvert.DeserializeObject <WsCommand>(e.Data);
if (command.Command == "print")
{
#region print
Logger.InfoLog("print " + command.Seq + " data:" + command.Data);
lock (this) {
if (command.Type == "image")
{
if (command.Data.StartsWith("["))
{
// 多个图片
List <KeyValuePair <string, string> > imageList = JsonConvert.DeserializeObject <List <KeyValuePair <string, string> > >(command.Data);
printImage(command.Seq, command.Printer, imageList);
}
else
{
printImage(command.Seq, command.Printer, command.Data);
}
}
else if (command.Type == "html")
{
if (command.Data.StartsWith("["))
{
// 多个html
List <KeyValuePair <string, string> > htmlList = JsonConvert.DeserializeObject <List <KeyValuePair <string, string> > >(command.Data);
}
else
{
printHtml(command.Seq, command.Data);
}
}
else
{
string extension = Path.GetExtension(command.Data);
if (Regex.IsMatch(extension, @"(jpg|jpeg|png|jfif)", RegexOptions.IgnoreCase))
{
printImage(command.Seq, command.Printer, command.Data);
}
else if (Regex.IsMatch(extension, @"(html|html)", RegexOptions.IgnoreCase))
{
printHtml(command.Seq, command.Data);
}
}
}
#endregion
}
else if (command.Command == "getPrinters")
{
#region getPriters 打印机列表
PrinterSettings.StringCollection printers = PrinterSettings.InstalledPrinters;
List <string> result = new List <string>();
foreach (string item in printers)
{
result.Add(item);
}
WsResponse <List <string> > chkr = new WsResponse <List <string> >();
chkr.Seq = command.Seq;
chkr.Data = result;
Send(JsonConvert.SerializeObject(chkr));
#endregion
}
else if (command.Command == "checkPrinter")
{
#region checkPrinter 查看打印机是否正常开启
PrinterSettings.StringCollection printers = PrinterSettings.InstalledPrinters;
bool hasThePrinter = false;
foreach (string item in printers)
{
if (command.Data == item)
{
hasThePrinter = true;
break;
}
}
WsResponse <string> er = new WsResponse <string>();
er.Seq = command.Seq;
if (hasThePrinter)
{
er.Data = "OK";
}
else
{
er.Code = "NG";
}
Send(JsonConvert.SerializeObject(er));
#endregion
}
else
{
#region error
WsResponse <string> er = new WsResponse <string>();
er.Seq = command.Seq;
er.Code = "NG";
er.Data = "命令" + command.Command + "不支持";
Send(JsonConvert.SerializeObject(er));
#endregion
}
}