WCF the remote server returned an error: (400) Bad request

This error does not occur if a small amount of data is used to call the WCF Service, but is returned if a large amount of data is used. It took several hours to know that the WCF Service layer also needs the bindingconfiguration attribute to modify the Web. config of the service layer.
Web. config
============
<Services>
<Service name = "doccube. businesslogic. documentmanager"
Behaviorconfiguration = "httpgetbehavior">
<Endpoint binding = "wshttpbinding" bindingconfiguration = "wshttp"
Contract = "doccube. Interfaces. idocumentmanager"
Address = ""/>
</Service>
</Services>

Note: manually add the "bindingconfiguration" attribute. vsplatform does not automatically generate this attribute. The configuration associated with bindingconfiguration is as follows:

<Bindings>
<Wshttpbinding>
<Binding name = "wshttp" maxcompute edmessagesize = "9999999"
Messageencoding = "MTOM" maxbufferpoolsize = "9999999">
& Lt; readerquotas maxdepth = "9999999"
Maxarraylength = "9999999" maxbytesperread = "9999999"
Maxnametablecharcount = "9999999" maxstringcontentlength = "9999999"/>
<Security mode = "NONE"/>
</Binding>
</Wshttpbinding>
</Bindings>

Then. delete the config file and re-obtain the service reference at the service layer. Note that the binding protocols referenced by the client and server must be the same, for example, the app of the client. the value of binding referenced by config, maxcompute edmessagesize is equal to 9999999, so the service layer must have the same configuration, and this value is also 9999999.