Problems returning a large amount of data through WCF

Question

Good Afternoon,

I have a web service done in WCF, when I do a query in the bank and return a large amount of records it gives me the following error:

An unhandled Exception of type 'System.ServiceModel.Communicationexception' occurred in mscorlib.dll Additional information: The maximum size quota for incoming messages (65536) has been exceeded. To increase the quota, use the Maxreceivedmessagesize property in the appropriate association element.

someone can help me?

Answer 1

When you use the "Add Service Reference" to generate the client for the WCF service, this tool adds in your configuration file (app.config or web.config) the information necessary for the client to communicate with the server. One of them is the binding to be used.

You can change the configuration of binding to increase this share that the error message is saying is being exceeded. For example:

<bindings>
  <basicHttpBinding>
    <binding
        name="BasicHttpBinding_MyService"
        maxReceivedMessageSize="1000000" />
  </basicHttpBinding>
</bindings>

Another alternative is to do this in the code, before calling a client function for the first time, as in the example below.

        var c = new ServiceReference1.MyServiceClient();
        var binding = c.Endpoint.Binding;
        if (binding is BasicHttpBinding)
        {
            ((BasicHttpBinding)binding).MaxReceivedMessageSize = 1000000;
        }
        else if (binding is WSHttpBinding)
        {
            ((WSHttpBinding)binding).MaxReceivedMessageSize = 1000000;
        }
        else
        {
            // outros tipos
            var newBinding = new CustomBinding(binding);
            for (var i = 0; i < newBinding.Elements.Count; i++)
            {
                if (newBinding.Elements[i] is TransportBindingElement) {
                    ((TransportBindingElement)newBinding.Elements[i]).MaxReceivedMessageSize = 1000000;
                }
            }

            c.Endpoint.Binding = newBinding;
        }