Save resized image in Database with Jquery

$("#btnSend").click(function (evt) {
    evt.preventDefault();
    evt.stopPropagation();

    if (validateMSG()) {
        //debugger;
        //console.log(document.getElementById('attachment').files[0].getAsBinary());
        //console.log(body);
        var mailMsg = { From: clientId, To: parseInt(msgTo), Subject: Subject, Body: body }

        $.ajax({
            url: "/StuffProfile.asmx/SendMessage",
            data: JSON.stringify({ mailMsg: mailMsg }),
            dataType: "json",
            type: "POST",
            async: true,
            cache: false,
            contentType: "application/json; charset=utf-8",
            success: function (result) {
                res = $.parseJSON(result.d);
                $("#staff-id").val('');
                $("#txtSubject").val('');
                $(".editor").val('');
                $("#compose-close").click();
                jAlert(res.MSG, "Success");
                //var obj = { type: 2, LASTMAILID: res.MSGID };
                ajaxFileUpload();
                GetNewMailMesseges(2, res.MSGID - 1);
                GetMailCount(2);
            },
            error: function () { jAlert("Error Occured", "Error"); },
            complete: function () {
            }
        });
    }

});
function validateMSG()
{
    var msgTo = $("#staff-id").val();
    if (!msgTo) { jAlert("Select a Staff or Send to Please", "Error", function () { $("#txtTo").focus(); return false; }); }
    else return true;
    var Subject = $("#txtSubject").val();
    if (Subject == '') { jAlert("Add Subject Please", "Error", function () { $("#txtSubject").focus(); return false; }) }
    else return true;
    var body = $(".editor").val();
    if (!body) { jAlert("You cannot send empty message."); $(".editor").focus(); return false; }
    else return true;
}

/// <summary>
       /// Send Mail Message
       /// </summary>
       /// <param name="mailMsg">Wooskie.Business.Mail Object </param>
       /// <returns>Success Message</returns>
       [WebMethod]
       [ScriptMethod(ResponseFormat = ResponseFormat.Json, XmlSerializeString = true)]
       public string SendMessage( Mail mailMsg )
       {
           mailMsg.Read = false;
           mailMsg.Status = "sent";
           mailMsg.Date = DateTime.UtcNow;
           try
           {
               var db = new WooskieDBInstance().WooskieDB;
               db.Mails.InsertOnSubmit(mailMsg);
               db.SubmitChanges();
               var mailID = mailMsg.ID;
               return  new JavaScriptSerializer().Serialize(new { MSG = "Mail Send Successfully.",MSGID=mailID });
           }
           catch (Exception ex)
           {
               return ex.Message;
           }
       }

<div id="compose" class="mail ui-widget">
        
        <img title="Close" alt="X" src="../Images/close-button.png" id="compose-close">
        <div class="compose ui-widget">
            <input type="text" role="textbox" class="txt-to margin-left" id="txtTo"
                required="required" placeholder="Send To" style="width: 100%" />
            <input type="hidden" id="staff-id" />
           

            <br />
            <input type="text" role="textbox" class="txt-subject margin-left" style="width: 100%" id="txtSubject" required="required" placeholder="Subject" />
            <br />
            <br />
            <asp:Label ID="Label3" runat="server" Text="Message" meta:resourcekey="Label3Resource1"></asp:Label>

            <textarea class="editor"></textarea>
            <script src="../ckeditor/ckeditor.js"></script>
            <script src="../ckeditor/adapters/jquery.js"></script>
            <script type="text/javascript">
                $('textarea.editor').ckeditor();
            </script>
            <br />
            <br />
            <fieldset>
                <legend>Upload</legend>
                <asp:FileUpload ID="fileToUpload" runat="server"   ClientIDMode="Static" meta:resourcekey="attachmentResource1"  Font-Size="9px" Width="100%" />

            </fieldset>
        </div>
    </div>