Вы можете сделать это, расширив фабрику хоста.Небольшой модификацией кода ниже вы можете передать дополнительный параметр в WCFServiceHostFactory, чтобы установить его из Global.asax. Я использовал классы ниже, чтобы всегда устанавливать его в Int32.MaxValue
// в Global.asax
routes.Add(new ServiceRoute(routePrefix,
new WCFServiceHostFactory(),
serviceType));
// WCFServiceHostFactory.cs
namespace MyServices.MyService
{
public class WCFServiceHostFactory:WebServiceHostFactory
{
protected override ServiceHost CreateServiceHost(Type serviceType, Uri[] baseAddresses)
{
WCFServiceHost host = new WCFServiceHost(serviceType, baseAddresses);
return host;
}
}
}
// WCFServiceHost.cs
namespace MyServices.MyService
{
public class WCFServiceHost:WebServiceHost
{
public WCFServiceHost(): base ()
{
}
public WCFServiceHost (object singletonInstance, params Uri [] baseAddresses)
: base (singletonInstance, baseAddresses)
{
}
public WCFServiceHost(Type serviceType, params Uri[] baseAddresses)
: base (serviceType, baseAddresses)
{
}
protected override void OnOpening ()
{
base.OnOpening ();
foreach (Uri baseAddress in BaseAddresses) {
bool found = false;
foreach (ServiceEndpoint se in Description.Endpoints)
if (se.Address.Uri == baseAddress)
{
found = true;
((WebHttpBinding)se.Binding).ReaderQuotas.MaxStringContentLength = Int32.MaxValue;//here you set it and also set it below
}
if (!found) {
if (ImplementedContracts.Count > 1)
throw new InvalidOperationException ("Service '"+ Description.ServiceType.Name + "' implements multiple ServiceContract types, and no endpoints are defined in the configuration file. WebServiceHost can set up default endpoints, but only if the service implements only a single ServiceContract. Either change the service to only implement a single ServiceContract, or else define endpoints for the service explicitly in the configuration file. When more than one contract is implemented, must add base address endpoint manually");
var enumerator = ImplementedContracts.Values.GetEnumerator ();
enumerator.MoveNext ();
Type contractType = enumerator.Current.ContractType;
WebHttpBinding binding = new WebHttpBinding();
binding.ReaderQuotas.MaxStringContentLength = Int32.MaxValue; //here also
AddServiceEndpoint (contractType, binding, baseAddress);
}
}
foreach (ServiceEndpoint se in Description.Endpoints)
if (se.Behaviors.Find<WebHttpBehavior> () == null)
se.Behaviors.Add (new WebHttpBehavior ());
// disable help page.
ServiceDebugBehavior serviceDebugBehavior = Description.Behaviors.Find<ServiceDebugBehavior> ();
if (serviceDebugBehavior != null) {
serviceDebugBehavior.HttpHelpPageEnabled = false;
serviceDebugBehavior.HttpsHelpPageEnabled = false;
}
}
}
}