Can I set an unlimited length for maxJsonLength in

Question

I am using the autocomplete feature of jQuery. When I try to retrieve the list of more then 17000 records (each won't have more than 10 char length), it's exceeding the length and throws the error:

Exception information:
Exception type: InvalidOperationException
Exception message: Error during serialization or deserialization using the JSON JavaScriptSerializer. The length of the string exceeds the value set on the maxJsonLength property.

Can I set an unlimited length for maxJsonLength in web.config? If not, what is the maximum length I can set?

Answer 1

You do not need to do with web.config You can use short property during catch value of the passing list For example declare a model like

public class BookModel
    {
        public decimal id { get; set; }  // 1 

        public string BN { get; set; } // 2 Book Name

        public string BC { get; set; } // 3 Bar Code Number

        public string BE { get; set; } // 4 Edition Name

        public string BAL { get; set; } // 5 Academic Level

        public string BCAT { get; set; } // 6 Category
}

here i use short proporties like BC =barcode BE=book edition and so on

Answer 2

I was having this problem in ASP.NET Web Forms. It was completely ignoring the web.config file settings so I did this:

        JavaScriptSerializer serializer = new JavaScriptSerializer();

        serializer.MaxJsonLength = Int32.MaxValue; 

        return serializer.Serialize(response);

Of course overall this is terrible practice. If you are sending this much data in a web service call you should look at a different approach.

Answer 3

I suggest setting it to Int32.MaxValue.

JavaScriptSerializer serializer = new JavaScriptSerializer();
serializer.MaxJsonLength = Int32.MaxValue;

Answer 4

if this maxJsonLength value is a int then how big is its int 32bit/64bit/16bit.... i just want to be sure whats the maximum value i can set as my maxJsonLength

<scripting>
        <webServices>
            <jsonSerialization maxJsonLength="2147483647">
            </jsonSerialization>
        </webServices>
    </scripting>

Answer 5

For those who are having issues with in MVC3 with JSON that's automatically being deserialized for a model binder and is too large, here is a solution.

1. Copy the code for the JsonValueProviderFactory class from the MVC3 source code into a new class.
2. Add a line to change the maximum JSON length before the object is deserialized.
3. Replace the JsonValueProviderFactory class with your new, modified class.

Thanks to http://blog.naver.com/techshare/100145191355 and https://gist.github.com/DalSoft/1588818 for pointing me in the right direction for how to do this. The last link on the first site contains full source code for the solution.

Answer 6

use lib\Newtonsoft.Json.dll

public string serializeObj(dynamic json) {        
    return JsonConvert.SerializeObject(json);
}