I am making a jQuery AJAX call to a back-end WebMethod in an aspx.cs page. I am getting an error in the .NET JSON serialization. As such, I am looking for ways to either fix the error or avoid using JSON (the only return format for WebMethods):
Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property
The associated StackTrace is :
at System.Web.Script.Serialization.JavaScriptSerializer.Serialize(Object obj, StringBuilder output, SerializationFormat serializationFormat)\r\n at System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext context, WebServiceMethodData methodData, IDictionary'2 rawParams)\r\n at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)
The backend code is as follows (note: result is, in actuality about 110k of a control rendered to a string):
[WebMethod]
public static string GetContactListControl()
{
try
{
var result = "Hello World!"
return result;
}
catch (Exception e){
Logging.LogException(e);
return "Exception Thrown";
}
}
And I am never hitting the catch block, which to me shows that this issue is outside of my code.
I found a fix involving changing the web.config by inserting the following block, but it is not working:
<system.web.extensions>
<scripting>
<webServices>
<jsonSerialization maxJsonLength="123456"></jsonSerialization>
</webServices>
</scripting>
</system.web.extensions>
Project is .NET 3.5.
Thank you for any ideas and suggestions!
Configuration of the maxJsonLength property must be setup in the web.config. In order to allow this configuration to be permitted by IIS, the following
<sectionGroup>must be included inside of<configSections>: