Så här verifierar och sammanfogar du PrintTickets
Microsoft Windows Print Schema innehåller de flexibla och utökningsbara elementen PrintCapabilities och PrintTicket. Den förra specificerar funktionerna i en utskriftsenhet och den senare anger hur enheten ska använda dessa funktioner med avseende på en viss sekvens av dokument, enskilda dokument eller enskilda sidor.
En typisk sekvens med uppgifter för ett program som stöder utskrift är följande.
Fastställa en skrivares funktioner.
Konfigurera en PrintTicket för att använda dessa funktioner.
Verifiera PrintTicket.
Den här artikeln visar hur du gör detta.
Exempel
I det enkla exemplet nedan är vi bara intresserade av om en skrivare kan stödja dubbelsidig utskrift. De viktigaste stegen är följande.
Hämta ett PrintCapabilities objekt med metoden GetPrintCapabilities.
Testa om det finns den kapacitet du vill ha. I exemplet nedan testar vi DuplexingCapability-egenskapen hos PrintCapabilities-objektet för att kontrollera förmågan att skriva ut på båda sidor av ett pappersark med "sidvändning" längs den långa sidan av arket. Eftersom DuplexingCapability är en samling använder vi metoden
ContainsReadOnlyCollection<T>.Obs
Det här steget är inte absolut nödvändigt. Den MergeAndValidatePrintTicket metod som används nedan kontrollerar varje begäran i PrintTicket mot skrivarens funktioner. Om den begärda funktionen inte stöds av skrivaren ersätter skrivardrivrutinen en alternativ begäran i PrintTicket som returneras av metoden.
Om skrivaren stöder duplex skapar exempelkoden en PrintTicket som ber om duplexering. Men programmet anger inte alla möjliga skrivarinställningar som är tillgängliga i elementet PrintTicket. Det skulle vara slöseri med både programmerare och programtid. I stället anger koden bara duplex-begäran och sammanfogar sedan detta PrintTicket med en befintlig, fullständigt konfigurerad och verifierad PrintTicket, i det här fallet användarens standard PrintTicket.
Därför anropar exemplet metoden MergeAndValidatePrintTicket för att sammanfoga den nya, minimala PrintTicket med användarens standard PrintTicket. Detta returnerar en ValidationResult som innehåller den nya PrintTicket som en av dess egenskaper.
Exemplet testar sedan att den nya PrintTicket begär duplex. Om så är fallet gör exemplet det till den nya standardutskriftsbiljetten för användaren. Om steg 2 ovan hade utelämnats och skrivaren inte hade stöd för duplexering längs långsidan, skulle testet ha resulterat i
false. (Se anteckningen ovan.)Det sista viktiga steget är att genomföra ändringen av egenskapen UserPrintTicket för PrintQueue med metoden Commit.
/// <summary>
/// Changes the user-default PrintTicket setting of the specified print queue.
/// </summary>
/// <param name="queue">the printer whose user-default PrintTicket setting needs to be changed</param>
static private void ChangePrintTicketSetting(PrintQueue queue)
{
//
// Obtain the printer's PrintCapabilities so we can determine whether or not
// duplexing printing is supported by the printer.
//
PrintCapabilities printcap = queue.GetPrintCapabilities();
//
// The printer's duplexing capability is returned as a read-only collection of duplexing options
// that can be supported by the printer. If the collection returned contains the duplexing
// option we want to set, it means the duplexing option we want to set is supported by the printer,
// so we can make the user-default PrintTicket setting change.
//
if (printcap.DuplexingCapability.Contains(Duplexing.TwoSidedLongEdge))
{
//
// To change the user-default PrintTicket, we can first create a delta PrintTicket with
// the new duplexing setting.
//
PrintTicket deltaTicket = new PrintTicket();
deltaTicket.Duplexing = Duplexing.TwoSidedLongEdge;
//
// Then merge the delta PrintTicket onto the printer's current user-default PrintTicket,
// and validate the merged PrintTicket to get the new PrintTicket we want to set as the
// printer's new user-default PrintTicket.
//
ValidationResult result = queue.MergeAndValidatePrintTicket(queue.UserPrintTicket, deltaTicket);
//
// The duplexing option we want to set could be constrained by other PrintTicket settings
// or device settings. We can check the validated merged PrintTicket to see whether the
// the validation process has kept the duplexing option we want to set unchanged.
//
if (result.ValidatedPrintTicket.Duplexing == Duplexing.TwoSidedLongEdge)
{
//
// Set the printer's user-default PrintTicket and commit the set operation.
//
queue.UserPrintTicket = result.ValidatedPrintTicket;
queue.Commit();
Console.WriteLine("PrintTicket new duplexing setting is set on '{0}'.", queue.FullName);
}
else
{
//
// The duplexing option we want to set has been changed by the validation process
// when it was resolving setting constraints.
//
Console.WriteLine("PrintTicket new duplexing setting is constrained on '{0}'.", queue.FullName);
}
}
else
{
//
// If the printer doesn't support the duplexing option we want to set, skip it.
//
Console.WriteLine("PrintTicket new duplexing setting is not supported on '{0}'.", queue.FullName);
}
}
''' <summary>
''' Changes the user-default PrintTicket setting of the specified print queue.
''' </summary>
''' <param name="queue">the printer whose user-default PrintTicket setting needs to be changed</param>
Private Shared Sub ChangePrintTicketSetting(ByVal queue As PrintQueue)
'
' Obtain the printer's PrintCapabilities so we can determine whether or not
' duplexing printing is supported by the printer.
'
Dim printcap As PrintCapabilities = queue.GetPrintCapabilities()
'
' The printer's duplexing capability is returned as a read-only collection of duplexing options
' that can be supported by the printer. If the collection returned contains the duplexing
' option we want to set, it means the duplexing option we want to set is supported by the printer,
' so we can make the user-default PrintTicket setting change.
'
If printcap.DuplexingCapability.Contains(Duplexing.TwoSidedLongEdge) Then
'
' To change the user-default PrintTicket, we can first create a delta PrintTicket with
' the new duplexing setting.
'
Dim deltaTicket As New PrintTicket()
deltaTicket.Duplexing = Duplexing.TwoSidedLongEdge
'
' Then merge the delta PrintTicket onto the printer's current user-default PrintTicket,
' and validate the merged PrintTicket to get the new PrintTicket we want to set as the
' printer's new user-default PrintTicket.
'
Dim result As ValidationResult = queue.MergeAndValidatePrintTicket(queue.UserPrintTicket, deltaTicket)
'
' The duplexing option we want to set could be constrained by other PrintTicket settings
' or device settings. We can check the validated merged PrintTicket to see whether the
' the validation process has kept the duplexing option we want to set unchanged.
'
If result.ValidatedPrintTicket.Duplexing = Duplexing.TwoSidedLongEdge Then
'
' Set the printer's user-default PrintTicket and commit the set operation.
'
queue.UserPrintTicket = result.ValidatedPrintTicket
queue.Commit()
Console.WriteLine("PrintTicket new duplexing setting is set on '{0}'.", queue.FullName)
Else
'
' The duplexing option we want to set has been changed by the validation process
' when it was resolving setting constraints.
'
Console.WriteLine("PrintTicket new duplexing setting is constrained on '{0}'.", queue.FullName)
End If
Else
'
' If the printer doesn't support the duplexing option we want to set, skip it.
'
Console.WriteLine("PrintTicket new duplexing setting is not supported on '{0}'.", queue.FullName)
End If
End Sub
Så att du snabbt kan testa det här exemplet visas resten av det nedan. Skapa ett projekt och ett namnområde och klistra sedan in båda kodfragmenten i den här artikeln i namnområdesblocket.
/// <summary>
/// Displays the correct command line syntax to run this sample program.
/// </summary>
static private void DisplayUsage()
{
Console.WriteLine();
Console.WriteLine("Usage #1: printticket.exe -l \"<printer_name>\"");
Console.WriteLine(" Run program on the specified local printer");
Console.WriteLine();
Console.WriteLine(" Quotation marks may be omitted if there are no spaces in printer_name.");
Console.WriteLine();
Console.WriteLine("Usage #2: printticket.exe -r \"\\\\<server_name>\\<printer_name>\"");
Console.WriteLine(" Run program on the specified network printer");
Console.WriteLine();
Console.WriteLine(" Quotation marks may be omitted if there are no spaces in server_name or printer_name.");
Console.WriteLine();
Console.WriteLine("Usage #3: printticket.exe -a");
Console.WriteLine(" Run program on all installed printers");
Console.WriteLine();
}
[STAThread]
static public void Main(string[] args)
{
try
{
if ((args.Length == 1) && (args[0] == "-a"))
{
//
// Change PrintTicket setting for all local and network printer connections.
//
LocalPrintServer server = new LocalPrintServer();
EnumeratedPrintQueueTypes[] queue_types = {EnumeratedPrintQueueTypes.Local,
EnumeratedPrintQueueTypes.Connections};
//
// Enumerate through all the printers.
//
foreach (PrintQueue queue in server.GetPrintQueues(queue_types))
{
//
// Change the PrintTicket setting queue by queue.
//
ChangePrintTicketSetting(queue);
}
}//end if -a
else if ((args.Length == 2) && (args[0] == "-l"))
{
//
// Change PrintTicket setting only for the specified local printer.
//
LocalPrintServer server = new LocalPrintServer();
PrintQueue queue = new PrintQueue(server, args[1]);
ChangePrintTicketSetting(queue);
}//end if -l
else if ((args.Length == 2) && (args[0] == "-r"))
{
//
// Change PrintTicket setting only for the specified remote printer.
//
String serverName = args[1].Remove(args[1].LastIndexOf(@"\"));
String printerName = args[1].Remove(0, args[1].LastIndexOf(@"\")+1);
PrintServer ps = new PrintServer(serverName);
PrintQueue queue = new PrintQueue(ps, printerName);
ChangePrintTicketSetting(queue);
}//end if -r
else
{
//
// Unrecognized command line.
// Show user the correct command line syntax to run this sample program.
//
DisplayUsage();
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine(e.StackTrace);
//
// Show inner exception information if it's provided.
//
if (e.InnerException != null)
{
Console.WriteLine("--- Inner Exception ---");
Console.WriteLine(e.InnerException.Message);
Console.WriteLine(e.InnerException.StackTrace);
}
}
finally
{
Console.WriteLine("Press Return to continue...");
Console.ReadLine();
}
}//end Main
''' <summary>
''' Displays the correct command line syntax to run this sample program.
''' </summary>
Private Shared Sub DisplayUsage()
Console.WriteLine()
Console.WriteLine("Usage #1: printticket.exe -l ""<printer_name>""")
Console.WriteLine(" Run program on the specified local printer")
Console.WriteLine()
Console.WriteLine(" Quotation marks may be omitted if there are no spaces in printer_name.")
Console.WriteLine()
Console.WriteLine("Usage #2: printticket.exe -r ""\\<server_name>\<printer_name>""")
Console.WriteLine(" Run program on the specified network printer")
Console.WriteLine()
Console.WriteLine(" Quotation marks may be omitted if there are no spaces in server_name or printer_name.")
Console.WriteLine()
Console.WriteLine("Usage #3: printticket.exe -a")
Console.WriteLine(" Run program on all installed printers")
Console.WriteLine()
End Sub
<STAThread>
Public Shared Sub Main(ByVal args() As String)
Try
If (args.Length = 1) AndAlso (args(0) = "-a") Then
'
' Change PrintTicket setting for all local and network printer connections.
'
Dim server As New LocalPrintServer()
Dim queue_types() As EnumeratedPrintQueueTypes = {EnumeratedPrintQueueTypes.Local, EnumeratedPrintQueueTypes.Connections}
'
' Enumerate through all the printers.
'
For Each queue As PrintQueue In server.GetPrintQueues(queue_types)
'
' Change the PrintTicket setting queue by queue.
'
ChangePrintTicketSetting(queue)
Next queue 'end if -a
ElseIf (args.Length = 2) AndAlso (args(0) = "-l") Then
'
' Change PrintTicket setting only for the specified local printer.
'
Dim server As New LocalPrintServer()
Dim queue As New PrintQueue(server, args(1))
ChangePrintTicketSetting(queue) 'end if -l
ElseIf (args.Length = 2) AndAlso (args(0) = "-r") Then
'
' Change PrintTicket setting only for the specified remote printer.
'
Dim serverName As String = args(1).Remove(args(1).LastIndexOf("\"))
Dim printerName As String = args(1).Remove(0, args(1).LastIndexOf("\")+1)
Dim ps As New PrintServer(serverName)
Dim queue As New PrintQueue(ps, printerName)
ChangePrintTicketSetting(queue) 'end if -r
Else
'
' Unrecognized command line.
' Show user the correct command line syntax to run this sample program.
'
DisplayUsage()
End If
Catch e As Exception
Console.WriteLine(e.Message)
Console.WriteLine(e.StackTrace)
'
' Show inner exception information if it's provided.
'
If e.InnerException IsNot Nothing Then
Console.WriteLine("--- Inner Exception ---")
Console.WriteLine(e.InnerException.Message)
Console.WriteLine(e.InnerException.StackTrace)
End If
Finally
Console.WriteLine("Press Return to continue...")
Console.ReadLine()
End Try
End Sub
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