Why I can't use Newtonsoft.Json JsonConvert.SerializeObject in wcf service?

1
votes

I am using Newtonsoft.Json dll for Serialize object to return string from wcf service. When I call other simple method from service it works fine but when I call method which serialize object into string and return that string its not working. Below is my code of service.

public string GetString()
    {
        return "Hello";
    }

    public string GetData(int i)
    {
        My_Entities ME = new MY_Entities();

        ApplicationVM oVM = new ApplicationVM()
        {
            AP_M_BloodGroup = ME.AP_M_BloodGroup.ToList().ElementAtOrDefault(i),
            AP_M_DayMaster = ME.AP_M_DayMaster.ToList().ElementAtOrDefault(i)
        };
        return JsonConvert.SerializeObject(oVM, Formatting.Indented);
    }

Both method work for local but after hosting when calling GetData() method it will give error message "Access Denied" at client side. So, what is the problem and what I need to put extra?

When I put client side code in try-catch block it gives message like:

Message: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed

1
c#asp.netwcf
what is your class ApplicationVM doing? is it accessing some resources? what identity is you application pool running under? – Andrew
ApplicationVM is simple Entity model class which consume two entity class for BloodGroup and DayMaster. – Mehul Patel
Are you able to create context class within GetData method? What credentials are you using to connect to your database? first method simply returns an constant - that has nothing to say. – Andrew
yes, it works proper and also work fine with inbuilt js serialization. – Mehul Patel
Will this help? under system.web <trust level="Full" /> in web.config – d_z

1 Answers

1
votes

I use 

<trust level="Full" />

under system.web in web.config as per @d_Z suggested and it works.