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c#ajaxjsonwebmethodwindows-server

How to send large/multi-part JSON object without changing maxJsonLength?

In my current C# web application I request a JSON object from a WebMethod, this JSON object exceeds the maximumJSONLength. And results in:

InvalidOperationException: The length of the string exceeds the value set on the maxJsonLength property.

My current solution has been to raise the maxJsonlength (in the Web.config) above the JSON length of the object, but now that I am migrating my application over to Windows Server (Which does not seem to support this override). Is there a way to send the JSON object through an ajax POST in parts? If so what is the best solution, I have searched for a way to send the data in multiple parts but there is no clear solution.

Solution

  • This is not a solution that works with out editing the maxJsonLength, but it allows maxJsonLength to be modified in Windows Server.

    Adding the following to my web.config allowed me to then edit the maxJsonLength.

    <configuration>
  <configSections>
    <sectionGroup name="system.web.extensions"         type="System.Web.Configuration.SystemWebExtensionsSectionGroup, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
    <sectionGroup name="scripting" type="System.Web.Configuration.ScriptingSectionGroup, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
        <section name="scriptResourceHandler" type="System.Web.Configuration.ScriptingScriptResourceHandlerSection, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication"/>
        <sectionGroup name="webServices" type="System.Web.Configuration.ScriptingWebServicesSectionGroup, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35">
            <section name="jsonSerialization" type="System.Web.Configuration.ScriptingJsonSerializationSection, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="Everywhere" />
            <section name="profileService" type="System.Web.Configuration.ScriptingProfileServiceSection, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication" />
            <section name="authenticationService" type="System.Web.Configuration.ScriptingAuthenticationServiceSection, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication" />
            <section name="roleService" type="System.Web.Configuration.ScriptingRoleServiceSection, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" requirePermission="false" allowDefinition="MachineToApplication" />
        </sectionGroup>
    </sectionGroup>
    </sectionGroup>
  </configSections>
  ... 
</configuration>

    I hope this helps anyone else coming a similar problem.