>From the documentation, I thought that 31999 characters would work too, but I found that it didn't always work. At least with my test case, if the first call to WriteConsoleW is smaller than 26000ish, then you can call it subsequent times with up to 31999 chars, but if the first call is with anything > 26000ish, then it prints nothing (for example, passing 30000 characters to the first call of WriteConsoleW doesn't print anything - at least in my test it didn't).
I don't understand this behavior, and hope that you can come up with something more reasonable and understandable - just wanted to warn you to be on the lookout for this weird behavior. > -----Original Message----- > From: Nicko Cadell [mailto:[EMAIL PROTECTED] > Sent: Friday, January 28, 2005 2:35 PM > To: Log4NET Dev > Subject: RE: Patch to allow large messages to be logged via > ColoredConsoleAppender > > It looks like the buffer passed to WriteConsoleW is limited to 64KB, > i.e. 32000 WCHARs less 1 for the NULL if the P/Invoke marshalling feels > like putting one on the end of the string. > > I will update the appender along the lines of your patch. > > > Thanks, > Nicko > > > -----Original Message----- > > From: Wesley Smith [mailto:[EMAIL PROTECTED] > > Sent: 27 January 2005 20:03 > > To: log4net-dev@logging.apache.org > > Subject: Patch to allow large messages to be logged via > > ColoredConsoleAppender > > > > I found that if you attempt to log a message of more than > > about 26000 characters, ColoredConsoleAppender will not log > > the message (no error, just silently eats the message). One > > possible fix for the problem is given in the patch below: > > > > > > --- C:\TEMP\log4net-1.2.0-beta8\src\Appender\ColoredConsoleAppender.cs > > Mon Jul 07 01:05:02 2003 > > +++ C:\Program > > Files\log4net\log4net-1.2.0-beta8\src\Appender\ColoredConsoleA > > ppender.cs > > Wed Jan 26 12:57:22 2005 > > @@ -280,13 +280,32 @@ > > > > string strLoggingMessage = > > RenderLoggingEvent(loggingEvent); > > > > - // write the output. > > UInt32 uiWritten = 0; > > + > > + // WriteConsoleW can only handle a limited > > number of characters at a time > > + // and emperically, 26000 is about right. > > + const int maxChunkSize = 26000; > > + while (strLoggingMessage.Length > maxChunkSize) > > + { > > + string firstPart = > > strLoggingMessage.Substring(0, maxChunkSize); > > + WriteConsoleW( iConsoleHandle, > > + firstPart, > > + (UInt32)firstPart.Length, > > + out (UInt32)uiWritten, > > + IntPtr.Zero); > > + > > + // Remove the characters already output > > from strLoggingMessage > > + strLoggingMessage = > > strLoggingMessage.Substring(maxChunkSize); > > + > > + } > > + // write the remaining output. > > + > > WriteConsoleW( iConsoleHandle, > > > > strLoggingMessage, > > > > (UInt32)strLoggingMessage.Length, > > out > > (UInt32)uiWritten, > > IntPtr.Zero); > > + > > } > > > > /// <summary> > >
