C# 打印机连接状态判断

/// <summary>
/// 判断是否连接打印机
/// </summary>
public bool CheckPrinter()
{
//取得默认打印机名
PrintDocument pdoc = new PrintDocument();
string printerName1 = pdoc.PrinterSettings.PrinterName; ManagementScope scope = new ManagementScope(@"\root\cimv2");
scope.Connect(); // Select Printers from WMI Object Collections
ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_Printer"); string printerName = "";
foreach (ManagementObject printer in searcher.Get())
{
printerName = printer["Name"].ToString().ToLower();
if (printerName.IndexOf(printerName1.ToLower()) > -)
{ if (printer["WorkOffline"].ToString().ToLower().Equals("true"))
{
switch (MessageBox.Show("默认打印机未连接或出错", "警告", MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Error))
{
case DialogResult.Retry:
CheckPrinter();
break;
}
return false;
// printer is offline by user }
else
{
// printer is not offline return true;
}
}
}
switch (MessageBox.Show("默认打印机未连接或出错", "警告", MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Error))
{
case DialogResult.Retry:
CheckPrinter();
break;
}
return false;
} /// <summary>
/// 判断打印机状态,传Exception
/// </summary>
/// <param name="ex">Exception</param>
public void ErrerPrint(Exception ex)
{
PrintQueue pq = LocalPrintServer.GetDefaultPrintQueue();
string PrintStaticText = "";
bool isPrintErrer = false; switch (pq.QueueStatus)
{
case PrintQueueStatus.Busy:
PrintStaticText = "打印机正忙";
isPrintErrer = true;
break;
case PrintQueueStatus.DoorOpen:
PrintStaticText = "打印机上的门已打开";
isPrintErrer = true;
break;
case PrintQueueStatus.Error:
PrintStaticText = "由于错误情况，打印机无法打印。";
isPrintErrer = true;
break;
case PrintQueueStatus.IOActive:
PrintStaticText = "打印机正在与打印服务器交换数据";
isPrintErrer = true;
break;
case PrintQueueStatus.Initializing:
PrintStaticText = "打印机正在初始化";
isPrintErrer = true;
break;
case PrintQueueStatus.ManualFeed:
PrintStaticText = "打印机正在等待用户将打印介质放入手动送纸盒";
isPrintErrer = true;
break;
case PrintQueueStatus.NoToner:
PrintStaticText = "打印机墨粉用完";
isPrintErrer = true;
break;
case PrintQueueStatus.None:
PrintStaticText = "未指定状态。";
isPrintErrer = true;
break;
case PrintQueueStatus.NotAvailable:
PrintStaticText = "状态信息不可用";
isPrintErrer = true;
break;
case PrintQueueStatus.Offline:
PrintStaticText = "打印机处于脱机状态。";
isPrintErrer = true;
break;
case PrintQueueStatus.OutOfMemory:
PrintStaticText = "打印机无可用内存";
isPrintErrer = true;
break;
case PrintQueueStatus.OutputBinFull:
PrintStaticText = "打印机的输出纸盒已满";
isPrintErrer = true;
break;
case PrintQueueStatus.PagePunt:
PrintStaticText = "打印机不能打印当前页";
isPrintErrer = true;
break;
case PrintQueueStatus.PaperJam:
PrintStaticText = "打印机卡纸";
isPrintErrer = true;
break;
case PrintQueueStatus.PaperOut:
PrintStaticText = "打印机中没有或已用完当前打印作业所需的纸张类型";
isPrintErrer = true;
break;
case PrintQueueStatus.PaperProblem:
PrintStaticText = "打印机中的纸张导致未指定的错误情况";
isPrintErrer = true;
break;
case PrintQueueStatus.Paused:
PrintStaticText = "打印队列已暂停";
isPrintErrer = true;
break;
case PrintQueueStatus.PendingDeletion:
PrintStaticText = "打印队列正在删除打印作业";
isPrintErrer = true;
break;
case PrintQueueStatus.PowerSave:
PrintStaticText = "打印机处于节能模式";
isPrintErrer = true;
break;
case PrintQueueStatus.Printing:
PrintStaticText = "设备正在打印";
isPrintErrer = true;
break;
case PrintQueueStatus.Processing:
PrintStaticText = "设备正在执行某种工作，如果此设备是集打印机、传真机和扫描仪于一体的多功能设备，则不需要打印";
isPrintErrer = true;
break;
case PrintQueueStatus.ServerUnknown:
PrintStaticText = "打印机处于错误状态";
isPrintErrer = true;
break;
case PrintQueueStatus.TonerLow:
PrintStaticText = "打印机中只剩下少量墨粉";
isPrintErrer = true;
break;
case PrintQueueStatus.UserIntervention:
PrintStaticText = "打印机要求通过用户操作来更正错误情况";
isPrintErrer = true;
break;
case PrintQueueStatus.Waiting:
PrintStaticText = "打印机正在等待打印作业";
isPrintErrer = true;
break;
case PrintQueueStatus.WarmingUp:
PrintStaticText = "打印机正在预热";
isPrintErrer = true;
break;
} if (isPrintErrer)
{
WriteLog.SetString(PrintStaticText);
MessageBox.Show(PrintStaticText, "警告", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
if (ex.Message == "The net printer is unavailable.")
{
MessageBox.Show("网络打印机不可用", "警告", MessageBoxButtons.OK, MessageBoxIcon.Error);
WriteLog.SetString(ex.Message);
}
else
{
WriteLog.SetException(ex);
}
}