ASP.Net: Upload Image (File) with Web Service using jQuery AJAX

Upload Image with Web Service using jQuery AJAX in ASP.Net

[WebService(Namespace = "http://medicelo.in/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
[System.Web.Script.Services.ScriptService]
public class Upload_Prescription : System.Web.Services.WebService
{
    private bool _result;
    public bool Result
    {
        get { return this._result; }
        set { this._result = value; }
    }
    private string _message;
    public string Message
    {
        get { return this._message; }
        set { this._message = value; }
    }
    public Upload_Prescription()
    {

        //Uncomment the following line if using designed components 
        //InitializeComponent(); 
    }
    [WebMethod]
    public string UploadPrescription(FileData fileData)
    {
        Result = false;
        ShowMessage msg = new ShowMessage();
        if (!string.IsNullOrEmpty(fileData.FileName))
        {
            try
            {
                byte[] imageBytes = Convert.FromBase64String(fileData.Data);

                string filePath = "https://medicelo.in/assests/prescription/" + fileData.FileName.Replace(" ", "_");
                System.IO.File.WriteAllBytes(Server.MapPath(filePath), imageBytes);
                using (SqlConnection conn = Connection.getConnection())
                {

                    using (SqlCommand cmd = new SqlCommand("usp_insert_tbl_customer_prescription", conn))
                    {
                        cmd.CommandType = CommandType.StoredProcedure;
                        cmd.Parameters.AddWithValue("@mobile", fileData.Mobile);
                        cmd.Parameters.AddWithValue("@prescription", fileData.FileName);
                        cmd.Parameters.AddWithValue("@pimagepaht", filePath);
                        cmd.Parameters.AddWithValue("@vdate", System.DateTime.Now);
                        cmd.Parameters.AddWithValue("@remarks", fileData.Remark);
                        cmd.Parameters.AddWithValue("@makeorder", fileData.MakeOrder);
                        cmd.Parameters.AddWithValue("@ordercount", fileData.OrderCount);
                        conn.Open();
                        cmd.ExecuteNonQuery();
                        conn.Close();
                        Result = true;
                        Message = "Congratulation ! Prescription Upload Successfully";
                    }
                }
            }
            catch (Exception ex)
            {
                Message = ex.Message;
            }
        }
        msg.Message = Message.ToString();
        msg.Result = Result.ToString();
        return JsonConvert.SerializeObject(msg);
    }

    public class FileData
    {
        public string Mobile { get; set; }
        public string FileName { get; set; }
        public string Data { get; set; }
        public string Remark { get; set; }
        public string MakeOrder { get; set; }
        public string OrderCount { get; set; }
    }
    public class ShowMessage
    {
        public string Message { get; set; }
        public string Result { get; set; }
    }
}

i also setting in webconfig file but it not working.

<system.webServer> 
<httpProtocol> 
<customHeaders> 
<!-- Adding the following custom HttpHeader will help prevent CORS from stopping the Request--> 
<add name="Access-Control-Allow-Origin" value="*" /> 
</customHeaders> 
</httpProtocol> 
</system.webServer>

    $.ajax({
        type: "POST",
        url: "https://medicelo.in/Upload_Prescription.asmx/UploadPrescription",
        data: '{fileData : ' + JSON.stringify(obj) + ' }',
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        crossDomain: true,
        success: function (response) {
            var data = response.d;
            data = $.parseJSON(data);
            if (data.Result == 'True') {
                $.iaoAlert({ position: 'top-right', msg: data.Message, type: "success", mode: "dark", });
                window.location.href = "customerprescription.aspx";
            }
            else {
                $.iaoAlert({ position: 'top-right', msg: data.Message, type: "error", mode: "dark", });
            }
            var output = document.getElementById('preview');
            output.src = "assests/images/Upload-icon.png";
            $('.btn-outline-secondary').hide();
        },
 
        error: function (r) {
            alert(r.responseText);
        },
 
        failure: function (r) {
            alert(r.responseText);
        }
    });
    return false;
});