[mapguide-users] ByteReader Problem

[Campbell, Keith A]

Kenneth,
 
If I run this code, it results in an endless loop because the 
    read = mapByteRdr.Read(buf, buf.length);
call reads the same data each time - the start point for each read is
not advanced.
 
Keith

________________________________

From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Kenneth,
GEOGRAF A/S
Sent: 31 August 2007 17:14
To: MapGuide Users Mail List
Subject: Re: [mapguide-users] ByteReader Problem


The only way around it, that I have found, is to copy/paste code like
this:

System.IO.MemoryStream ms = new System.IO.MemoryStream();
byte[] buf = new byte[8*1024];
int read = 1;
while(read != 0)
{
    read = mapByteRdr.Read(buf, buf.length);
  ms.Write(buf, 0, read);
}

//ms now contains the stream


Regards, Kenneth, GEOGRAF A/S


Campbell, Keith A skrev: 

	Thanks Dennis.
	 
	I've tried this, but I'm only getting 8192 bytes read into the
byte buffer. This seems to be the problem mentioned by Kenneth. The Read
method doesn't seem to allow the start location for the read to be set,
so looping until the entire content of the Resource is read into the
buffer doesn't seem to be an option.
	 
	Presumably somebody must have found a way around this.
	 
	Keith

________________________________

	From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Jonio,
Dennis (Aviation)
	Sent: 31 August 2007 14:05
	To: MapGuide Users Mail List
	Subject: RE: [mapguide-users] ByteReader Problem
	
	

	... this sequence tends to work     

	 

	     // For some reason the MgByteReader "disappears"

	     // This seems to work ....

	            long long_length =
rs.GetResourceContent(resId).GetLength();

	            byte[] byteBuffer = new byte[long_length];

	            int numBytes =
rs.GetResourceContent(resId).Read(byteBuffer, (int)long_length);

	 

	-----Original Message-----
	From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Campbell,
Keith A
	Sent: Friday, August 31, 2007 7:10 AM
	To: MapGuide Users Mail List
	Subject: [mapguide-users] ByteReader Problem

	 

	I am trying to alter a map definition through the API and cannot
get the contents of the MgByteReader in string format. Here's the code:-

	            String mapDefinition = "Library://My Folder/Maps/My
Map.MapDefinition"; 
	            MgResourceIdentifier MapResID = new
MgResourceIdentifier(mapDefinition); 

	            MgByteReader mapByteRdr =
res.GetResourceContent(MapResID);//res is instantiated Resource Service.


	            XmlDocument doc = new XmlDocument(); 
	            
	            doc.LoadXml(mapByteRdr.ToString()); 

	LoadXML fails with an error ' Root element is missing'. I can
copy the contents of mapByteRdr from Visual Studio at runtime and it
contains properly formatted XML for the map definition. If I use the
ToFile() method, the resultant file is empty. I cannot see why these two
methods do not return the xml string in the reader. Any help is welcome.

	Cheers, 

	Keith 

	 

	This email and any attached files are confidential and copyright
protected. If you are not the addressee, any dissemination of this
communication is strictly prohibited. Unless otherwise expressly agreed
in writing, nothing stated in this communication shall be legally
binding. 

	The ultimate parent company of the Atkins Group is WS Atkins
plc. Registered in England No. 1885586. Registered Office Woodcote
Grove, Ashley Road, Epsom, Surrey KT18 5BW. 

	P Consider the environment. Please don't print this e-mail
unless you really need to. 

	
________________________________


	E-mails are automatically scanned for viruses using McAfee. 



	This message has been scanned for viruses by MailControl
<http://bluepages.wsatkins.co.uk/?6875772> 



	This email and any attached files are confidential and copyright
protected. If you are not the addressee, any dissemination of this
communication is strictly prohibited. Unless otherwise expressly agreed
in writing, nothing stated in this communication shall be legally
binding. 

	The ultimate parent company of the Atkins Group is WS Atkins
plc. Registered in England No. 1885586. Registered Office Woodcote
Grove, Ashley Road, Epsom, Surrey KT18 5BW. 

	P Consider the environment. Please don't print this e-mail
unless you really need to. 

	
________________________________


	_______________________________________________
	mapguide-users mailing list
	mapguide-users at lists.osgeo.org
	http://lists.osgeo.org/mailman/listinfo/mapguide-users
	  

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/mapguide-users/attachments/20070903/c1a5b004/attachment.html