PrintDocument.PrintPage-Ereignis
Tritt ein, wenn die zu druckende Ausgabe für die aktuelle Seite benötigt wird.
Namespace: System.Drawing.Printing
Assembly: System.Drawing (in system.drawing.dll)
Syntax
'Declaration
Public Event PrintPage As PrintPageEventHandler
'Usage
Dim instance As PrintDocument
Dim handler As PrintPageEventHandler
AddHandler instance.PrintPage, handler
public event PrintPageEventHandler PrintPage
public:
event PrintPageEventHandler^ PrintPage {
void add (PrintPageEventHandler^ value);
void remove (PrintPageEventHandler^ value);
}
/** @event */
public void add_PrintPage (PrintPageEventHandler value)
/** @event */
public void remove_PrintPage (PrintPageEventHandler value)
JScript unterstützt die Verwendung von Ereignissen, aber nicht die Deklaration von neuen Ereignissen.
Hinweise
Um die zu druckende Ausgabe festzulegen, verwenden Sie das in PrintPageEventArgs enthaltene Graphics-Objekt. Wenn Sie z. B. eine zu druckende Textzeile angeben möchten, zeichnen Sie den Text mithilfe der System.Drawing.Graphics.DrawString-Methode.
Zusätzlich zum Angeben der Ausgabe können Sie bestimmen, ob weitere Seiten gedruckt werden sollen, indem Sie die PrintPageEventArgs.HasMorePages-Eigenschaft auf true festlegen. Der Standardwert ist false und gibt an, dass keine weiteren Seiten gedruckt werden sollen. Darüber hinaus können einzelne Seiteneinstellungen mithilfe von PageSettings angepasst werden, und der Druckauftrag kann abgebrochen werden, indem die PrintPageEventArgs.Cancel-Eigenschaft auf true festgelegt wird. Wenn Sie die einzelnen Seiten eines Dokuments mit unterschiedlichen Seiteneinstellungen ausdrucken möchten, behandeln Sie das QueryPageSettings-Ereignis.
Fügen Sie dem Ereignis eine Instanz des PrintPageEventHandler-Delegaten hinzu, um dem Ereignishandler das Ereignis zuzuordnen. Der Ereignishandler wird bei jedem Eintreten des Ereignisses aufgerufen. Weitere Informationen zum Behandeln von Ereignissen mit Delegaten finden Sie unter Ereignisse und Delegaten.
Beispiel
Im folgenden Codebeispiel wird das Behandeln des PrintPage-Ereignisses veranschaulicht.
Verwenden Sie für dieses Beispiel die folgenden Namespaces: System.Drawing, System.Drawing.Printing und System.IO.
Public Class PrintingExample
Inherits System.Windows.Forms.Form
Private components As System.ComponentModel.Container
Private printButton As System.Windows.Forms.Button
Private printFont As Font
Private streamToPrint As StreamReader
Public Sub New()
' The Windows Forms Designer requires the following call.
InitializeComponent()
End Sub
' The Click event is raised when the user clicks the Print button.
Private Sub printButton_Click(sender As Object, e As EventArgs)
Try
streamToPrint = New StreamReader("C:\My Documents\MyFile.txt")
Try
printFont = New Font("Arial", 10)
Dim pd As New PrintDocument()
AddHandler pd.PrintPage, AddressOf Me.pd_PrintPage
pd.Print()
Finally
streamToPrint.Close()
End Try
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
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)
' Print each line of the file.
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 Not (line Is Nothing) Then
ev.HasMorePages = True
Else
ev.HasMorePages = False
End If
End Sub
' The Windows Forms Designer requires the following procedure.
Private Sub InitializeComponent()
Me.components = New System.ComponentModel.Container()
Me.printButton = New System.Windows.Forms.Button()
Me.ClientSize = New System.Drawing.Size(504, 381)
Me.Text = "Print Example"
printButton.ImageAlign = System.Drawing.ContentAlignment.MiddleLeft
printButton.Location = New System.Drawing.Point(32, 110)
printButton.FlatStyle = System.Windows.Forms.FlatStyle.Flat
printButton.TabIndex = 0
printButton.Text = "Print the file."
printButton.Size = New System.Drawing.Size(136, 40)
AddHandler printButton.Click, AddressOf printButton_Click
Me.Controls.Add(printButton)
End Sub
' This is the main entry point for the application.
Public Shared Sub Main()
Application.Run(New PrintingExample())
End Sub
End Class
public class PrintingExample : System.Windows.Forms.Form
{
private System.ComponentModel.Container components;
private System.Windows.Forms.Button printButton;
private Font printFont;
private StreamReader streamToPrint;
public PrintingExample() : base()
{
// The Windows Forms Designer requires the following call.
InitializeComponent();
}
// The Click event is raised when the user clicks the Print button.
private void printButton_Click(object sender, EventArgs e)
{
try
{
streamToPrint = new StreamReader
("C:\\My Documents\\MyFile.txt");
try
{
printFont = new Font("Arial", 10);
PrintDocument pd = new PrintDocument();
pd.PrintPage += new PrintPageEventHandler
(this.pd_PrintPage);
pd.Print();
}
finally
{
streamToPrint.Close();
}
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
// 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);
// Print each line of the file.
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;
}
// The Windows Forms Designer requires the following procedure.
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.printButton = new System.Windows.Forms.Button();
this.ClientSize = new System.Drawing.Size(504, 381);
this.Text = "Print Example";
printButton.ImageAlign =
System.Drawing.ContentAlignment.MiddleLeft;
printButton.Location = new System.Drawing.Point(32, 110);
printButton.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
printButton.TabIndex = 0;
printButton.Text = "Print the file.";
printButton.Size = new System.Drawing.Size(136, 40);
printButton.Click += new System.EventHandler(printButton_Click);
this.Controls.Add(printButton);
}
// This is the main entry point for the application.
public static void Main(string[] args)
{
Application.Run(new PrintingExample());
}
}
public ref class PrintingExample: public System::Windows::Forms::Form
{
private:
System::ComponentModel::Container^ components;
System::Windows::Forms::Button^ printButton;
System::Drawing::Font^ printFont;
StreamReader^ streamToPrint;
public:
PrintingExample()
: Form()
{
// The Windows Forms Designer requires the following call.
InitializeComponent();
}
private:
// The Click event is raised when the user clicks the Print button.
void printButton_Click( Object^ /*sender*/, EventArgs^ /*e*/ )
{
try
{
streamToPrint = gcnew StreamReader( "C:\\My Documents\\MyFile.txt" );
try
{
printFont = gcnew System::Drawing::Font( "Arial",10 );
PrintDocument^ pd = gcnew PrintDocument;
pd->PrintPage += gcnew PrintPageEventHandler( this, &PrintingExample::pd_PrintPage );
pd->Print();
}
finally
{
streamToPrint->Close();
}
}
catch ( Exception^ ex )
{
MessageBox::Show( ex->Message );
}
}
// 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 );
// Print each line of the file.
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;
}
// The Windows Forms Designer requires the following procedure.
void InitializeComponent()
{
this->components = gcnew System::ComponentModel::Container;
this->printButton = gcnew System::Windows::Forms::Button;
this->ClientSize = System::Drawing::Size( 504, 381 );
this->Text = "Print Example";
printButton->ImageAlign = System::Drawing::ContentAlignment::MiddleLeft;
printButton->Location = System::Drawing::Point( 32, 110 );
printButton->FlatStyle = System::Windows::Forms::FlatStyle::Flat;
printButton->TabIndex = 0;
printButton->Text = "Print the file.";
printButton->Size = System::Drawing::Size( 136, 40 );
printButton->Click += gcnew System::EventHandler( this, &PrintingExample::printButton_Click );
this->Controls->Add( printButton );
}
};
// This is the main entry point for the application.
int main()
{
Application::Run( gcnew PrintingExample );
}
public class PrintingExample extends System.Windows.Forms.Form
{
private System.ComponentModel.Container components;
private System.Windows.Forms.Button printButton;
private Font printFont;
private StreamReader streamToPrint;
public PrintingExample()
{
// The Windows Forms Designer requires the following call.
InitializeComponent();
} //PrintingExample
// The Click event is raised when the user clicks the Print button.
private void printButton_Click(Object sender, EventArgs e)
{
try {
streamToPrint = new StreamReader("C:\\My Documents\\MyFile.txt");
try {
printFont = new Font("Arial", 10);
PrintDocument pd = new PrintDocument();
pd.add_PrintPage(new PrintPageEventHandler(this.pd_PrintPage));
pd.Print();
}
finally {
streamToPrint.Close();
}
}
catch (System.Exception ex) {
MessageBox.Show(ex.get_Message());
}
} //printButton_Click
// 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.get_MarginBounds().get_Left();
float topMargin = ev.get_MarginBounds().get_Top();
String line = null;
// Calculate the number of lines per page.
linesPerPage = ev.get_MarginBounds().get_Height() /
printFont.GetHeight(ev.get_Graphics());
// Print each line of the file.
while ((count < linesPerPage &&
(line = streamToPrint.ReadLine()) != null)) {
yPos = topMargin + count * printFont.GetHeight(ev.get_Graphics());
ev.get_Graphics().DrawString(line, printFont, Brushes.get_Black(),
leftMargin, yPos, new StringFormat());
count++;
}
// If more lines exist, print another page.
if (line != null) {
ev.set_HasMorePages(true);
}
else {
ev.set_HasMorePages(false);
}
} //pd_PrintPage
// The Windows Forms Designer requires the following procedure.
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.printButton = new System.Windows.Forms.Button();
this.set_ClientSize(new System.Drawing.Size(504, 381));
this.set_Text("Print Example");
printButton.set_ImageAlign(System.Drawing.ContentAlignment.MiddleLeft);
printButton.set_Location(new System.Drawing.Point(32, 110));
printButton.set_FlatStyle(System.Windows.Forms.FlatStyle.Flat);
printButton.set_TabIndex(0);
printButton.set_Text("Print the file.");
printButton.set_Size(new System.Drawing.Size(136, 40));
printButton.add_Click(new System.EventHandler(printButton_Click));
this.get_Controls().Add(printButton);
} //InitializeComponent
// This is the main entry point for the application.
public static void main(String[] args)
{
Application.Run(new PrintingExample());
} //main
} //PrintingExample
Plattformen
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
Siehe auch
Referenz
PrintDocument-Klasse
PrintDocument-Member
System.Drawing.Printing-Namespace
PrintPageEventHandler
PrintPageEventArgs
PrintDocument.BeginPrint-Ereignis
PrintDocument.EndPrint-Ereignis
QueryPageSettings
Graphics-Klasse