那是因为您没有在服务器使用哪个绑定。让我们看一下您的服务器配置：

That would be because you didn't specify on the server which binding to use. Let's take a look at your server config:

在< bindings> 下，您正在为< basicHttpBinding> ，而您将其命名为 name = basicHttpBinding 。另外，您的端点名称是<端点名称= basicHttpBinding ...> ，其绑定是 binding = basicHttpBinding 。 但是不是指您的绑定配置，而是指绑定类型。因此，它实际上使用的是 basicHttpBinding 的默认设置。

Under <bindings> you are creating a binding configuration for <basicHttpBinding>, and you are naming it name="basicHttpBinding". Also, your endpoint name is <endpoint name="basicHttpBinding" ...> and its binding is binding="basicHttpBinding". However, it's not referring to your binding configuration, but to the binding type. So, it's actually using the default settings for basicHttpBinding.

要解决此问题，请首先命名端点并绑定配置有所不同。例如，< endpoint name = basicEndpoint ...> 和< binding name = myBasicBinding ...> 。然后，您需要使用以下属性将绑定配置分配给端点： bindingConfiguration = myBasicBinding 。

To fix this, first of all name your endpoint and binding configuration differently. For example, <endpoint name="basicEndpoint" ... > and <binding name="myBasicBinding" ... >. Then you need to assign your binding configuration to your endpoint with this attribute: bindingConfiguration="myBasicBinding".

这是客户端配置：

<system.web>
    <httpRuntime maxRequestLength="32768"/>
</system.web>

<system.serviceModel>
    <client>
        <endpoint name="basicEndpoint"
            address="http://localhost:9502/HCDataService"
            binding="basicHttpBinding"
            bindingConfiguration="myBasicBinding"
            contract="HC.APP.Common.ServiceContract.IHCServiceContract"
            behaviorConfiguration="ServiceBehaviour">
        </endpoint>
    </client>

    <bindings>
        <basicHttpBinding>
            <binding name="myBasicBinding" maxBufferSize="2147483647" maxBufferPoolSize="524288" maxReceivedMessageSize="2147483647">
                <readerQuotas maxDepth="128" maxStringContentLength="2147483647" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
            </binding>
        </basicHttpBinding>
    </bindings>

    <behaviors>
        <endpointBehaviors>
            <behavior name="ServiceBehaviour">
                <dataContractSerializer maxItemsInObjectGraph="2147483647"/>
            </behavior>
        </endpointBehaviors>
    </behaviors>    
</system.serviceModel>

这是服务器配置：

<system.serviceModel>
    <services>
        <service name="HC.APP.Server.Service.HCDataService" behaviorConfiguration="ServiceBehaviour">
            <host>
                <baseAddresses>
                    <add baseAddress="http://localhost:9502/HCDataService"/>
                </baseAddresses>
            </host>

            <endpoint name="basicEndpoint"
                address="http://localhost:9502/HCDataService"
                binding="basicHttpBinding"
                bindingConfiguration="myBasicBinding"
                contract="HC.APP.Common.ServiceContract.IHCServiceContract">
            </endpoint>
        </service>
    </services>

    <bindings>
        <basicHttpBinding>
            <binding name="myBasicBinding" maxBufferSize="2147483647" maxReceivedMessageSize="2147483647" closeTimeout="01:50:00" openTimeout="01:50:00" sendTimeout="01:50:00" receiveTimeout="01:50:00" >
                <readerQuotas maxDepth="128" maxStringContentLength="8388608" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" />
            </binding>
        </basicHttpBinding>
    </bindings>

    <behaviors>
        <serviceBehaviors>
            <behavior name="ServiceBehaviour">
                <serviceDebug includeExceptionDetailInFaults="true" />
                <serviceMetadata httpGetEnabled="true" />
                <dataContractSerializer ignoreExtensionDataObject="false" maxItemsInObjectGraph="2147483646" />
            </behavior>
        </serviceBehaviors>
    </behaviors>
</system.serviceModel>

别忘了更新服务参考在您的客户端上以获取正确的配置。

Don't forget to update service reference on your client to get the correct config.