Question

I am using jquery ajax method on my aspx page,which will invoke the webmethod in the code behind.Currently the webmethod takes a couple of parameters like firstname,lastname,address etc which I am passing from jquery ajax method using

data:JSON.stringify({fname:firstname,lname:lastname,city:city})

now my requirement has been changed such that,the number and type of parameters that are going to be passed is not fixed for ex.parameter combination can be something like fname,city
or fname,city or city,lname or fname,lname,city or something else.So the webmethod should be such that it should accept any number parameters.I thought of using arrays to do so, as described here.

But I do not understand how can I identify which and how many parameters have been passed
to the webmethod to insert/update the data to the DB.Please could someone help me with this?

thanks

Answer 1

You can use a complex type on the client side that matches an object on the server side that contains an array or several arrays of your parameters.

Very crude example

(server side)

//class declaration     
public class MyObject
{
      //values
      string[] Keys;
      string[] Values;

      //methods
      public void Add()
      {...} 
}

//web service - WebService.asmx
[WebMethod]
public void AddObject(MyObject NewObject)
{
     NewObject.Keys.Length = ...;
     NewObject.Add();
     ...
}

(client side)

var MyObject= { };

MyObject.Keys = { $("#key1").val(), $("#key2").val(), ... };
MyObject.Values = { $("#val1").val(), $("#val2").val(), ... };

var DTO = { 'MyObject' : MyObject};

$.ajax({
   type: "POST",
   contentType: "application/json; charset=utf-8",
   url: "WebService.asmx/AddObject",
   data: JSON.stringify(DTO),
   dataType: "json"
});

The above example will serialize your object on the client side and you will be able to access the object on the server side just as if you created it with new().