在DataServiceContext中更改最大消息大小

Question

I am using DataServiceContext to get data from a wcf service which is hosting a dbml. It works fine in general but queries that return large amounts of data (eg binary files) create the usual WCF error:

The maximum message size quota for incoming messages (65536) has been exceeded. To increase the quota, use the MaxReceivedMessageSize property on the appropriate binding 

The problem is I cannot find how to change the message size of the channel.

Here's the code I use to initialise the class:

var channel = new RPDataModelDataContext(DataServiceBaseAddress);
channel.Credentials = CredentialCache.DefaultCredentials;

where RPDataModelDataContext is a client proxy class generated with the entityframework

public partial class RPDataModelDataContext : 
    global::System.Data.Services.Client.DataServiceContext
{
    // ...

Can anyone point me to the right direction?

Answer 1

I was having tons of problems with this one as well. There were three details I was missing.

1. You MUST specify the service name exactly. This should be the fully qualified service name. (ie. Namespace.ClassName )

2. You MUST provide the EXACT address of the endpoint. (See code below)

    <services> <!-- The service name below has to be the EXACT Namespace.ClassName of your WCF Data Service--> <service name="YourDomainNameHere.YourClassNameHere"> <!-- The address below must be the EXACT address of your service--> <endpoint address ="http://localhost:19766/YourServiceName.svc" binding="webHttpBinding" bindingConfiguration="higherMessageSize" contract ="System.Data.Services.IRequestHandler"> </endpoint> </service> </services> 

3. The maxReceivedMessageSize and the maxBufferSize must both be specified

    <bindings> <webHttpBinding> <!-- The maxReceivedMessageSize and the maxBufferSize must both be specified as shown below--> <binding name="higherMessageSize" maxReceivedMessageSize ="2048000" maxBufferSize="2048000"/> </webHttpBinding> </bindings> 

Answer 2

EDIT: This may actually be a service-side issue. You should ensure that service configuration file is set as shown at the answer with most votes. You basically need to change the MaxReceivedMessageSize value to something a little bigger than your largest expected query results size. I've had to set it as high as 2 MB without any issues.

Answer 3

After some research I found no way to customise the Data channel service client. So I guess that its not possible to.

One has to create a normal wcf client to interact with it.