public override void OnStartPrint(PrintDocument document, PrintEventArgs e) {
Debug.Assert(dc == null && graphics == null, "PrintController methods called in the wrong order?");
// For security purposes, don't assume our public methods methods are called in any particular order
CheckSecurity();
base.OnStartPrint(document, e);
try {
if (!document.PrinterSettings.IsValid)
throw new InvalidPrinterException(document.PrinterSettings);
IntSecurity.AllPrintingAndUnmanagedCode.Assert();
// We need a DC as a reference; we don't actually draw on it.
// We make sure to reuse the same one to improve performance.
dc = document.PrinterSettings.CreateInformationContext(modeHandle);
}
finally {
CodeAccessPermission.RevertAssert();
}
}
internal static void RemoveDeviceContext(DeviceContext dc)
{
if (activeDeviceContexts != null)
{
activeDeviceContexts.RemoveByHashCode(dc);
}
}
public override void OnStartPrint(PrintDocument document, PrintEventArgs e) {
Debug.Assert(dc == null && graphics == null, "PrintController methods called in the wrong order?");
// For security purposes, don't assume our public methods methods are called in any particular order
CheckSecurity(document);
base.OnStartPrint(document, e);
// the win32 methods below SuppressUnmanagedCodeAttributes so assertin on UnmanagedCodePermission is redundant
if (!document.PrinterSettings.IsValid)
throw new InvalidPrinterException(document.PrinterSettings);
dc = document.PrinterSettings.CreateDeviceContext(modeHandle);
SafeNativeMethods.DOCINFO info = new SafeNativeMethods.DOCINFO();
info.lpszDocName = document.DocumentName;
if (document.PrinterSettings.PrintToFile)
info.lpszOutput = document.PrinterSettings.OutputPort; //This will be "FILE:"
else
info.lpszOutput = null;
info.lpszDatatype = null;
info.fwType = 0;
int result = SafeNativeMethods.StartDoc(new HandleRef(this.dc, dc.Hdc), info);
if (result <= 0) {
int error = Marshal.GetLastWin32Error();
if (error == SafeNativeMethods.ERROR_CANCELLED) {
e.Cancel = true;
}
else {
throw new Win32Exception(error);
}
}
}
public override void OnEndPrint(PrintDocument document, PrintEventArgs e)
{
this.CheckSecurity(document);
System.Drawing.IntSecurity.UnmanagedCode.Assert();
try
{
if (this.dc != null)
{
try
{
int num = e.Cancel ? SafeNativeMethods.AbortDoc(new HandleRef(this.dc, this.dc.Hdc)) : SafeNativeMethods.EndDoc(new HandleRef(this.dc, this.dc.Hdc));
if (num <= 0)
{
throw new Win32Exception();
}
}
finally
{
this.dc.Dispose();
this.dc = null;
}
}
}
finally
{
CodeAccessPermission.RevertAssert();
}
base.OnEndPrint(document, e);
}
public override void OnEndPrint(PrintDocument document, PrintEventArgs e)
{
this.CheckSecurity();
this.dc.Dispose();
this.dc = null;
base.OnEndPrint(document, e);
}
internal static void AddDeviceContext(DeviceContext dc)
{
if (activeDeviceContexts == null)
{
activeDeviceContexts = new System.Drawing.ClientUtils.WeakRefCollection();
activeDeviceContexts.RefCheckThreshold = 20;
}
if (!activeDeviceContexts.Contains(dc))
{
dc.Disposing += new EventHandler(DeviceContexts.OnDcDisposing);
activeDeviceContexts.Add(dc);
}
}
/// <include file='doc\PreviewPrintController.uex' path='docs/doc[@for="PreviewPrintController.OnEndPrint"]/*' />
/// <devdoc>
/// <para>
/// Implements EndPrint for generating print preview information.
/// </para>
/// </devdoc>
public override void OnEndPrint(PrintDocument document, PrintEventArgs e) {
Debug.Assert(dc != null && graphics == null, "PrintController methods called in the wrong order?");
// For security purposes, don't assume our public methods are called in any particular order
CheckSecurity();
dc.Dispose();
dc = null;
base.OnEndPrint(document, e);
}
public override void OnEndPrint(PrintDocument document, PrintEventArgs e) {
Debug.Assert(dc != null && graphics == null, "PrintController methods called in the wrong order?");
// For security purposes, don't assume our public methods methods are called in any particular order
CheckSecurity(document);
IntSecurity.UnmanagedCode.Assert();
try
{
if (dc != null) {
try {
int result = (e.Cancel) ? SafeNativeMethods.AbortDoc(new HandleRef(dc, dc.Hdc)) : SafeNativeMethods.EndDoc(new HandleRef(dc, dc.Hdc));
if (result <= 0)
throw new Win32Exception();
}
finally {
dc.Dispose();
dc = null;
}
}
}
finally {
CodeAccessPermission.RevertAssert();
}
base.OnEndPrint(document, e);
}
public override void OnStartPrint(PrintDocument document, PrintEventArgs e)
{
this.CheckSecurity(document);
base.OnStartPrint(document, e);
if (!document.PrinterSettings.IsValid)
{
throw new InvalidPrinterException(document.PrinterSettings);
}
this.dc = document.PrinterSettings.CreateDeviceContext((IntPtr) base.modeHandle);
SafeNativeMethods.DOCINFO lpDocInfo = new SafeNativeMethods.DOCINFO {
lpszDocName = document.DocumentName
};
if (document.PrinterSettings.PrintToFile)
{
lpDocInfo.lpszOutput = document.PrinterSettings.OutputPort;
}
else
{
lpDocInfo.lpszOutput = null;
}
lpDocInfo.lpszDatatype = null;
lpDocInfo.fwType = 0;
if (SafeNativeMethods.StartDoc(new HandleRef(this.dc, this.dc.Hdc), lpDocInfo) <= 0)
{
int error = Marshal.GetLastWin32Error();
if (error != 0x4c7)
{
throw new Win32Exception(error);
}
e.Cancel = true;
}
}
public override void OnStartPrint(PrintDocument document, PrintEventArgs e)
{
this.CheckSecurity();
base.OnStartPrint(document, e);
try
{
if (!document.PrinterSettings.IsValid)
{
throw new InvalidPrinterException(document.PrinterSettings);
}
IntSecurity.AllPrintingAndUnmanagedCode.Assert();
this.dc = document.PrinterSettings.CreateInformationContext((IntPtr) base.modeHandle);
}
finally
{
CodeAccessPermission.RevertAssert();
}
}
