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 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;
}
}
