我被迫使用RawPrinterHelper类打印到热敏打印机，因为PrintDocument方法已证明不适合POS打印。
我现在需要在打印前检查打印机的状态，以确保它在线并准备好打印。我已经能够成功检查Win32_Printer的属性。当纸张或托盘打开时，我可以看到PrinterStatus等属性，从3更改为2或1。这很棒。
我的问题是，哪些属性应该表明它是O.K.打印？必须不仅仅是检查PrinterStatus是否空闲（3）。
private bool ReadyCheck(string printerName)
{
bool ready = false;
string query = string.Format("SELECT * from Win32_Printer WHERE Name LIKE '%{0}'", printerName);
using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(query))
using (ManagementObjectCollection coll = searcher.Get())
{
try
{
foreach (ManagementObject printer in coll)
{
// Print status = 3, idle and ready to print
string status = printer.Properties["PrinterStatus"].Value.ToString();
string extendedPrinterStatus = printer.Properties["ExtendedPrinterStatus"].Value.ToString();
// What else means printer is ready?
if (status.Trim() == "3")
ready = true;
}
}
catch (ManagementException ex)
{
Console.WriteLine(ex.Message);
}
}
return ready;
}
编辑： @vendettamit对不起我没问好。例如，空闲（3）表示可以打印。我想知道是否有更多也表明可以打印如此;打印（4），WarmUp（5），ect或空闲（3）是否应该发送下一个打印作业？感谢
答案 0 :(得分：1)
以下是您可以考虑的值，以检查它是否已准备好打印：
Other (1)
Unknown (2)
Idle (3)
Printing (4)
Warmup (5)
Stopped Printing (6)
Offline (7)
另请注意关于Win32_Printer-
的part文档的备注如果要检索 PrinterStatus = 3 或 PrinterState = 0 ，则打印机驱动程序可能无法将准确信息提供给WMI。 WMI从 spoolsv.exe 进程检索打印机信息。打印机驱动程序可能不会向假脱机程序报告其状态。在这种情况下，Win32_Printer将打印机报告为空闲。
答案 1 :(得分：0)
**//check printer is online**
private static bool IsOnline(ManagementBaseObject printer)
{
bool isOnlineprinter = true;
PrinterNative.PrinterNative.PrinterNative printerNative = new PrinterNative.PrinterNative.PrinterNative();
var PrinterName = printerNative.GetPrinterName();
var PrinterNameProperty = printer.Properties["DeviceId"].Value.ToString();
var ResultPrinter01 = printer.Properties["ExtendedPrinterStatus"].Value.ToString();
var ResultPrinter02 = printer.Properties["PrinterState"].Value.ToString();
if (PrinterNameProperty == PrinterName)
{
//(no internet connection or printer switched off):PrinterState
if (ResultPrinter02 == "128"|| ResultPrinter02=="4096")
{
isOnlineprinter = false;
}
////printer is initializing....
//if (ResultPrinter02 == "16")
//{
// isOnlineprinter = false;
//}
//(no internet connection or printer switched off):ExtendedPrinterStatus
if (ResultPrinter01 == "7")
{
isOnlineprinter = false;
}
}
return isOnlineprinter;
}
**//check for out of paper**
private static bool IspaperOK(ManagementBaseObject printer)
{
bool PaperOK = true;
PrinterNative.PrinterNative.PrinterNative printerNative = new PrinterNative.PrinterNative.PrinterNative();
var PrinterName = printerNative.GetPrinterName();
var PrinterNameProperty = printer.Properties["DeviceId"].Value.ToString();
var PaperStatus = printer.Properties["PrinterState"].Value.ToString();
if (PrinterNameProperty == PrinterName)
{
//(PrinterState)16 = Out of Paper
//(PrinterState)5 = Out of paper
//(PrinterState)4 = paperjam
//(PrinterState)144 = Out of paper
if ((PaperStatus == "5") || (PaperStatus == "16")||(PaperStatus=="144"))
{
PaperOK = false;
}
}
return PaperOK;
}
**//Verify still printing state or not**
private static bool Isprinting(ManagementBaseObject printer)
{
bool Isprintingnow = false;
PrinterNative.PrinterNative.PrinterNative printerNative = new PrinterNative.PrinterNative.PrinterNative();
var PrinterName = printerNative.GetPrinterName();
var PrinterNameProperty = printer.Properties["DeviceId"].Value.ToString();
var printing01 = printer.Properties["PrinterState"].Value.ToString();
var printing02 = printer.Properties["PrinterStatus"].Value.ToString();
if (PrinterNameProperty == PrinterName)
{
//(PrinterState)11 = Printing
//(PrinterState)1024 = printing
//(PrinterStatus)4 = printing
if (printing01 == "11" || printing01 == "1024" || printing02=="4")
{
Isprintingnow = true;
}
}
return Isprintingnow;
}
**//check for error (Printer)**
private static bool IsPrinterError(ManagementBaseObject printer)
{
bool PrinterOK = true;
PrinterNative.PrinterNative.PrinterNative printerNative = new PrinterNative.PrinterNative.PrinterNative();
var PrinterName = printerNative.GetPrinterName();
var PrinterNameProperty = printer.Properties["DeviceId"].Value.ToString();
var PrinterSpecificError = printer.Properties["PrinterState"].Value.ToString();
var otherError = printer.Properties["ExtendedPrinterStatus"].Value.ToString();
if (PrinterNameProperty == PrinterName)
{
//(PrinterState)2 - error of printer
//(PrinterState)131072 - Toner Low
//(PrinterState)18 - Toner Low
//(PrinterState)19 - No Toner
if ((PrinterSpecificError == "131072")||(PrinterSpecificError == "18")||(PrinterSpecificError == "19")||(PrinterSpecificError == "2")||(PrinterSpecificError == "7"))
{
PrinterOK = false;
}
//(ExtendedPrinterStatus) 2 - no error
if (otherError=="2")
{
PrinterOK = true;
}
else
{
PrinterOK = false;
}
}
return PrinterOK;
}
**//check Network or USB**
private static bool IsNetworkPrinter(ManagementBaseObject printer)
{
bool IsNetwork = true;
PrinterNative.PrinterNative.PrinterNative printerNative = new PrinterNative.PrinterNative.PrinterNative();
var PrinterName = printerNative.GetPrinterName();
var PrinterNameProperty = printer.Properties["DeviceId"].Value.ToString();
var network = printer.Properties["Network"].Value.ToString();
var local = printer.Properties["Local"].Value.ToString();
if (PrinterNameProperty == PrinterName)
{
if (network == "True")
{
IsNetwork = true;
}
if (network == "True" && local == "True")
{
IsNetwork = true;
}
if (local == "True" && network=="False")
{
IsNetwork = false;
}
}
return IsNetwork;
}
//(PrinterState)16 = Out of Paper
//(PrinterState)5 = Out of paper
//(PrinterState)4 = paperjam
//(PrinterState)144 = Out of paper
//(PrinterState)4194432 = Lid Open
//(PrinterState)4194448 = Out of paper/Lid open
//(PrinterState)4096= Offline
//(PrinterState)1024= Printing
//(PrinterState)128= Printer is offline