How to pass arrays to webservice in asp.net - asp.net

Question

I am trying to pass an array as a parameter in ajax but i am receiving an error. Kindly please tell me how to pass arrays to a web service.
Error
{"Message":"Type \u0027System.String\u0027 is not supported for deserialization of an array.","StackTrace":" at System.Web.Script.Serialization.ObjectConverter.ConvertListToObject(IList list, Type type, JavaScriptSerializer serializer, Boolean throwOnError, IList\u0026 convertedList)\r\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\u0026 convertedObject)\r\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\u0026 convertedObject)\r\n at System.Web.Script.Serialization.ObjectConverter.AddItemToList(IList oldList, IList newList, Type elementType, JavaScriptSerializer serializer, Boolean throwOnError)\r\n at System.Web.Script.Serialization.ObjectConverter.ConvertListToObject(IList list, Type type, JavaScriptSerializer serializer, Boolean throwOnError, IList\u0026 convertedList)\r\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\u0026 convertedObject)\r\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object\u0026 convertedObject)\r\n at System.Web.Script.Services.WebServiceMethodData.StrongTypeParameters(IDictionary`2 rawParams)\r\n at System.Web.Script.Services.WebServiceMethodData.CallMethodFromRawParams(Object target, IDictionary`2 parameters)\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)","ExceptionType":"System.InvalidOperationException"}
Webservice method
[WebMethod(Description = "Add Session List")]
[ScriptMethod(UseHttpGet = false)]
public stringAddSession(string org, string ins, string brn, string startdate, string enddate, string[] classes, string[] subjects, object[] classsubjects)
{
return "abc";
}
ajax call
$.ajax({
type: "POST",
url: /Services/session/SessionService.asmx/AddSession,
contentType: "application/json; charset=utf-8",
data: JSON.stringify({ 'org': OrgID, 'ins': InsID, 'brn': BrnID, 'startdate': StartDate, 'enddate': EndDate, 'classes': Classes, 'subjects': Subjects, 'classsubjects': ClassesWithSubjects };),
dataType: "json",
processData: false,
success: object,
error: function (err) {
console.log("AJAX ERROR");
alert(err.responseText);
}
});
Here is the request Payload

Answer 1

You can achieve also achieve same thing by using below code snippet.
var classes = new Array();
classes.push('calss1');
classes.push('class2');
var data = new Object();
data.org = OrgID; //How to add object
data.classes = classes; //How to add array
.......
.......
data: JSON.stringify(data);
.......
.......