jQuery AJAX Error: Failed to load resource: the server responded with a status of 500 (Internal Server Error)

Last Reply one year ago By dharmendr

Posted one year ago

Hello everyone,

I am calling a server side method using jQuery and Ajax but getting an "Failed to load resource: the server responded with a status of 500 (Internal Server Error)". I am unable to figure it out kindly, help me correcting out.

Any suggestions will be appriciated below is my code.

    <script src="../bootstrap/jQuery/jquery-3.3.1.js" type="text/javascript"></script>
    <script src="../bootstrap/jQuery/jquery-ui.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            $('#btnSubmit').click(function () {
                    url: 'RTGS_FileUpload.aspx/send',
                    method: 'post',
                    contentType: 'application/json',
                    data: '{}',
                    dataType: "json",
                    success: function (data) {
                    error: function (error) {


        public static void SendOTP()
            RTGSFileUpload rfu = new RTGSFileUpload();
            BELAP getAgencyBel = new BELAP();
            getAgencyBel.ImplementingAgency = Convert.ToInt16(rfu.Session["Agency_Id"]);
            BALAP getContactBal = new BALAP();
            getAgencyBel.ContactNo = getContactBal.getAgencyContactDetails(getAgencyBel).ToString();

            BELSMS objEntity = new BELSMS();
            objEntity.Mobile = "+91" + getAgencyBel.ContactNo;
            if (objEntity.Mobile != null)
                rfu.lblContact.Text = "Please enter OTP Send on XXXXXX" + objEntity.Mobile.Substring(objEntity.Mobile.Length - 4);
                BALSMS objSet = new BALSMS();
                rfu.Session["OTP"] = objSet.SendOtp(objEntity);
                rfu.lblContact.Text = "Please contact system administrator";


Posted one year ago

Hi AbdulHaque,

Please rectify below points.

1. Your WebMethod name is SendOTP and you are calling as send in jquery.

2. Add below attribute to you WebMethod.

[System.Web.Services.WebMethod(EnableSession = true)]
[System.Web.Script.Services.ScriptMethod(UseHttpGet = true, ResponseFormat = System.Web.Script.Services.ResponseFormat.Json)]

3. If you want to show message from the response then instead of void type return string type.