PrintDocument.Print Metodo

Definizione

Spazio dei nomi:

System.Drawing.Printing

Assembly:

System.Drawing.Common.dll

Pacchetto:

System.Drawing.Common v8.0.0

Origine:

PrintDocument.cs

Avvia il processo di stampa del documento.

public:
 void Print();

public void Print ();

member this.Print : unit -> unit

Public Sub Print ()

Eccezioni

InvalidPrinterException

La stampante indicata nella proprietà PrinterName non esiste.

Esempio

Nell'esempio di codice seguente viene stampato il file specificato tramite la riga di comando nella stampante predefinita.

Nota

L'esempio richiede che ogni riga si adatta alla larghezza della pagina.

Usare gli System.ComponentModelspazi dei nomi , System.DrawingSystem.Drawing.Printing, System.IOe System.Windows.Forms per questo esempio.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::IO;
using namespace System::Drawing;
using namespace System::Drawing::Printing;
using namespace System::Windows::Forms;


public ref class PrintingExample
{
private:
   Font^ printFont;
   StreamReader^ streamToPrint;
   static String^ filePath;

public:
   PrintingExample()
   {
      Printing();
   }


private:

   // The PrintPage event is raised for each page to be printed.
   void pd_PrintPage( Object^ /*sender*/, PrintPageEventArgs^ ev )
   {
      float linesPerPage = 0;
      float yPos = 0;
      int count = 0;
      float leftMargin = (float)ev->MarginBounds.Left;
      float topMargin = (float)ev->MarginBounds.Top;
      String^ line = nullptr;
      
      // Calculate the number of lines per page.
      linesPerPage = ev->MarginBounds.Height / printFont->GetHeight( ev->Graphics );
      
      // Iterate over the file, printing each line.
      while ( count < linesPerPage && ((line = streamToPrint->ReadLine()) != nullptr) )
      {
         yPos = topMargin + (count * printFont->GetHeight( ev->Graphics ));
         ev->Graphics->DrawString( line, printFont, Brushes::Black, leftMargin, yPos, gcnew StringFormat );
         count++;
      }

      
      // If more lines exist, print another page.
      if ( line != nullptr )
            ev->HasMorePages = true;
      else
            ev->HasMorePages = false;
   }


public:

   // Print the file.
   void Printing()
   {
      try
      {
         streamToPrint = gcnew StreamReader( filePath );
         try
         {
            printFont = gcnew Font( "Arial",10 );
            PrintDocument^ pd = gcnew PrintDocument;
            pd->PrintPage += gcnew PrintPageEventHandler( this, &PrintingExample::pd_PrintPage );
            
            // Print the document.
            pd->Print();
         }
         finally
         {
            streamToPrint->Close();
         }

      }
      catch ( Exception^ ex ) 
      {
         MessageBox::Show( ex->Message );
      }

   }

   static void Main()
   {
      array<String^>^args = Environment::GetCommandLineArgs();
      String^ sampleName = args[ 0 ];
      if ( args->Length != 2 )
      {
         Console::WriteLine( "Usage: {0} <file path>", sampleName );
         return;
      }

      filePath = args[ 1 ];
      gcnew PrintingExample;
   }

};

int main()
{
   PrintingExample::Main();
}

using System;
using System.IO;
using System.Drawing;
using System.Drawing.Printing;
using System.Windows.Forms;

 public class PrintingExample 
 {
     private Font printFont;
     private StreamReader streamToPrint;
     static string filePath;

     public PrintingExample() 
     {
         Printing();
     }
 
     // The PrintPage event is raised for each page to be printed.
     private void pd_PrintPage(object sender, PrintPageEventArgs ev) 
     {
         float linesPerPage = 0;
         float yPos =  0;
         int count = 0;
         float leftMargin = ev.MarginBounds.Left;
         float topMargin = ev.MarginBounds.Top;
         String line=null;
             
         // Calculate the number of lines per page.
         linesPerPage = ev.MarginBounds.Height  / 
            printFont.GetHeight(ev.Graphics) ;
 
         // Iterate over the file, printing each line.
         while (count < linesPerPage && 
            ((line=streamToPrint.ReadLine()) != null)) 
         {
            yPos = topMargin + (count * printFont.GetHeight(ev.Graphics));
            ev.Graphics.DrawString (line, printFont, Brushes.Black, 
               leftMargin, yPos, new StringFormat());
            count++;
         }
 
         // If more lines exist, print another page.
         if (line != null) 
            ev.HasMorePages = true;
         else 
            ev.HasMorePages = false;
     }
 
     // Print the file.
     public void Printing()
     {
         try 
         {
            streamToPrint = new StreamReader (filePath);
            try 
            {
               printFont = new Font("Arial", 10);
               PrintDocument pd = new PrintDocument(); 
               pd.PrintPage += new PrintPageEventHandler(pd_PrintPage);
               // Print the document.
               pd.Print();
            } 
            finally 
            {
               streamToPrint.Close() ;
            }
        } 
        catch(Exception ex) 
        { 
            MessageBox.Show(ex.Message);
        }
     }
   
     // This is the main entry point for the application.
     public static void Main(string[] args) 
     {
        string sampleName = Environment.GetCommandLineArgs()[0];
        if(args.Length != 1)
        {
           Console.WriteLine("Usage: " + sampleName +" <file path>");
           return;
        }
        filePath = args[0];
        new PrintingExample();
     }
 }

Imports System.IO
Imports System.Drawing
Imports System.Drawing.Printing
Imports System.Windows.Forms


Public Class PrintingExample
    Private printFont As Font
    Private streamToPrint As StreamReader
    Private Shared filePath As String
    
    Public Sub New()
        Printing()
    End Sub    
    
    ' The PrintPage event is raised for each page to be printed.
    Private Sub pd_PrintPage(sender As Object, ev As PrintPageEventArgs)
        Dim linesPerPage As Single = 0
        Dim yPos As Single = 0
        Dim count As Integer = 0
        Dim leftMargin As Single = ev.MarginBounds.Left
        Dim topMargin As Single = ev.MarginBounds.Top
        Dim line As String = Nothing
        
        ' Calculate the number of lines per page.
        linesPerPage = ev.MarginBounds.Height / printFont.GetHeight(ev.Graphics)
        
        ' Iterate over the file, printing each line.
        While count < linesPerPage
            line = streamToPrint.ReadLine()
            If line Is Nothing Then
                Exit While
            End If
            yPos = topMargin + count * printFont.GetHeight(ev.Graphics)
            ev.Graphics.DrawString(line, printFont, Brushes.Black, leftMargin, _
                yPos, New StringFormat())
            count += 1
        End While
        
        ' If more lines exist, print another page.
        If (line IsNot Nothing) Then
            ev.HasMorePages = True
        Else
            ev.HasMorePages = False
        End If
    End Sub
     
    ' Print the file.
    Public Sub Printing()
        Try
            streamToPrint = New StreamReader(filePath)
            Try
                printFont = New Font("Arial", 10)
                Dim pd As New PrintDocument()
                AddHandler pd.PrintPage, AddressOf pd_PrintPage
                ' Print the document.
                pd.Print()
            Finally
                streamToPrint.Close()
            End Try
        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try
    End Sub
    
    ' This is the main entry point for the application.
    Public Shared Sub Main()
        Dim args() As String = System.Environment.GetCommandLineArgs()
        Dim sampleName As String = args(0)
        If args.Length <> 1 Then
            Console.WriteLine("Usage: " & sampleName & " <file path>")
            Return
        End If
        filePath = args(0)
    End Sub
End Class

Commenti

Specificare l'output da stampare gestendo l'evento e usando l'oggetto PrintPageGraphics incluso in PrintPageEventArgs.

Utilizzare la PrinterSettings.PrinterName proprietà per specificare quale stampante deve stampare il documento.

Il Print metodo stampa il documento senza usare una finestra di dialogo di stampa. Usare un oggetto PrintDialog quando si vuole offrire all'utente la possibilità di scegliere le impostazioni di stampa.

Nota

Se viene generata un'eccezione non gestita dal metodo durante la Print stampa, la stampa del documento viene interrotta.