Hi lzorich,
From your description you're using WCF for remote commucation in a WPF
XBAP application. However, you found that when the size of the data sent
exceed a certain amount, the client-side can not receive the data without
any explicit error, correct?
Based on my experience, there are some common data receive/send issue which
is due to the maxReceiveBuffe r size or send size and it will result
explicit error. As for the problem, are you encountering it in this
particular project only or even if you try calling the wcf service in a
simple console project?
Also, have you tried using some network trace utility to see whether the
actual data has been arrived the client-side over http channel?
Sincerely,
Steven Cheng
Microsoft MSDN Online Support Lead
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--------------------
From: =?Utf-8?B?SXpvcmljaA= =?= <Iz*****@nospam .nospam>
Subject: WCF Byte Array Limitation in XBAP
Date: Mon, 21 Apr 2008 10:00:01 -070
I observed that WCF client running inside Full Trust mode XBAP application
can't read byte array over 16384. If return result is bigger than that
size,
then client simply get null or Nothing in VB and there are no exceptions. I
have tried increasing limits on both client and server. Here is a typical
entry:
<binding name="myBasicHt tpBinding"
maxBufferSize=" 2097152" maxBufferPoolSi ze="8388608"
maxReceivedMess ageSize="209715 2"
transferMode="B uffered">
<readerQuotas maxDepth="32" maxStringConten tLength="209715 2"
maxArrayLength= "2097152"
maxBytesPerRead ="3097152"
maxNameTableCha rCount="2097152 " />
</binding>
I also tried changing to transferMode="s tream".
I have found that WCF call would work when XBAP is started from Visual
Studio 2008. WCF client would not work if started when deployed to IIS
server. I also experimented with presentationhos t.exe invocations. Here are
results:
Call works:
presentationhos t.exe -debug -debugSecurityZo neURL
http://myhostname
"C:\fullpath\bi n\Debug\app.xba p"
Call returns null:
presentationhos t.exe
http://myhostname/virtualDir/version/app.xbap
In the end I gave up and decided to try out returning String. I had no
problem with large size strings. So, for the moment I seem to have only one
option and that is to return Base64Encoded string. It seems like a waste.
So, how do I configure WCF to transmit large byte arrays? The goal I have
here is to send large binary file from server to XBAP client.
I am also concerned that this limitation affects all types of arrays. I've
seen somewhere that I can configure some behavior attribute related to byte
array size, so may be that is the answer...
