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How to handle server-side exception during an Ajax call from jQuery?

I call the page method from jQuery as described here: http://encosia.com/2008/05/29/using-jquery-to-directly-call-aspnet-ajax-page-methods/

Everything is working fine. During testing, I encountered an error when my answer using the Web Method was too large: Error while serializing or deserializing using JSON JavaScriptSerializer. The string is longer than the value specified for the maxJsonLength property.

I was able to examine the maxJsonLength property a bit and set it higher, however I would like to try to catch this exception server before it is sent to the client during an Ajax call. How can I do it?

I set the try / catch block in my method to no avail, this happens outside my method (during JSON serialization).

StackTrace is as follows:

at System.Web.Script.Serialization.JavaScriptSerializer.Serialize (Object obj, StringBuilder output, SerializationFormat serializationFormat)  
at System.Web.Script.Serialization.JavaScriptSerializer.Serialize (Object obj, SerializationFormat serializationFormat)  
at System.Web.Script.Services.RestHandler.InvokeMethod (HttpContext context, WebServiceMethodData methodData, IDictionary`2 rawParams)  
at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall (HttpContext context, WebServiceMethodData methodData)

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Source: https://habr.com/ru/post/1721735/

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