Getting error from C# server code while making request through $.ajax

Question

I am using $.ajax to send request to C# code in Asp.Net.Each time i am getting the error in the response(checked in Firebug) like:

{"Message":"Invalid JSON primitive: EmailAddress.","StackTrace":"   at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializePrimitiveObject()\r\n   at System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth)\r\n   at System.Web.Script.Serialization.JavaScriptObjectDeserializer.BasicDeserialize(String input, Int32 depthLimit, JavaScriptSerializer serializer)\r\n   at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(JavaScriptSerializer serializer, String input, Type type, Int32 depthLimit)\r\n   at System.Web.Script.Serialization.JavaScriptSerializer.Deserialize[T](String input)\r\n   at System.Web.Script.Services.RestHandler.GetRawParamsFromPostRequest(HttpContext context, JavaScriptSerializer serializer)\r\n   at System.Web.Script.Services.RestHandler.GetRawParams(WebServiceMethodData methodData, HttpContext context)\r\n   at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)","ExceptionType":"System.ArgumentException"}

If i remove data:{} parameter from the $.ajax then it is fine.I think there is some problem with my way of sending data to the server.

My Client side code is: function send_req() {

        $.ajax({
            url: "Demo.aspx/Demo_Method",
            contentType: "application/json; charset=UTF-8",
            type: "POST",
            data: {"EmailAddress": "[email protected]"},
            success: function (response) {
                alert('Success' + response);
            }
        });
    }

And Demo.aspx.cs page code is:

public partial class Demo : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    [WebMethod()]
    public static void Demo_Method(string EmailAddress)
    {
        //Some code....

    }
}

Do you have an overloaded method "void Demo_Method(int something)"? — Warlock
– Warlock, Commented Mar 12, 2013 at 8:10
No only these two methods are there:void Page_Loda() and Void Demo_Method(string EmailAddress) — Gurmeet
– Gurmeet, Commented Mar 12, 2013 at 9:09

Helen · Accepted Answer · 2013-03-12 08:21:22Z

2

Remove quotation mark around EmailAddress parameter:

$.ajax({
   url: "Demo.aspx/Demo_Method",
   contentType: "application/json; charset=UTF-8",
   type: "POST",
   data: {EmailAddress: "[email protected]"},
          ^^^^^^^^^^^^

   success: function (response) {
         alert('Success' + response);
   }
});

edited Mar 12, 2013 at 8:21

Helen

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answered Mar 12, 2013 at 8:09

Rob

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Comments

Merenzo · Accepted Answer · 2013-03-12 08:11:24Z

0

In my calls, I specify dataType: "json", and wrap the whole data parameter in quotes.

e.g.

    $.ajax({
        url: "Demo.aspx/Demo_Method",
        contentType: "application/json; charset=UTF-8",
        type: "POST",
        dataType: "json",
        data: "{'EmailAddress':'[email protected]'}",
        success: function (response) {
            alert('Success' + response);
        }
    });

answered Mar 12, 2013 at 8:11

Merenzo

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Comments

JGil · Accepted Answer · 2013-03-12 08:15:38Z

0

Try to pass the data as string, not as object.

example:

$.ajax({
        url: "Demo.aspx/Demo_Method",
        contentType: "application/json; charset=UTF-8",
        type: "POST",
        data:  '{"EmailAddress": "[email protected]"}',
        success: function (response) {
            alert('Success' + response);
        }
    });

answered Mar 12, 2013 at 8:15

JGil

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