问使用10时jquery中的Web服务错误

EN

function SaveDataToParty() {
            var mode = "Save";
            var srno = 0;
            var partyname = $("#p1").val();
            var partyemail = $("#p2").val();
            var partyphone = $("#p3").val();
            var partyaddress = $("#p4").val();
            var webMethod = "../Service/DatabaseHandling.asmx/SaveDataToParty";
            var parameters = "{mode:'" + mode + "',srno:'" + srno + "',partyname:'" + partyname + "',partyemail:'" + partyemail + "',partyphone:'" + partyphone + "',partyaddress:'" + partyaddress + "'}";
            alert(parameters);
            $.ajax({
                type: "POST",
                url: webMethod,
                async:false,
                data: JSON.stringify(parameters),
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (msg) {
                    alert(msg.d);
                },
                error: function (e) {
                    alert(e.statusText);
                }
            });
        }

<WebMethod()> _
Public Function SaveDataToParty(mode As String, srno As String, partyname As String, partyemail As String, partyphone As String, partyaddress As String) As Boolean
    'this will start connection and set transaction to it
    Dim cnstr As String = String.Empty
    cnstr = System.Configuration.ConfigurationManager.ConnectionStrings("DPMTConnectionString").ConnectionString
    Dim cn As New SqlConnection(cnstr)
    Dim tran As SqlTransaction
    cn.Open()
    tran = cn.BeginTransaction
    Try
        'this will handle sp coding
        Dim dcmd As New SqlCommand
        dcmd.Connection = cn
        dcmd.CommandType = CommandType.StoredProcedure
        'sp execution for party entry
        If mode = "Save" Then
            dcmd.Parameters.Add("@mode", SqlDbType.NVarChar).Value = "ADD"
            dcmd.Parameters.Add("@srno", SqlDbType.Int).Value = 0
        End If
        If mode = "Update" Then
            dcmd.Parameters.Add("@mode", SqlDbType.NVarChar).Value = "UPDATE"
            dcmd.Parameters.Add("@srno", SqlDbType.Int).Value = srno
        End If

        dcmd.Parameters.Add("@partyname", SqlDbType.NVarChar).Value = partyname
        dcmd.Parameters.Add("@partyemail", SqlDbType.NVarChar).Value = partyemail
        dcmd.Parameters.Add("@partyphone", SqlDbType.NVarChar).Value = partyphone
        dcmd.Parameters.Add("@partyaddress", SqlDbType.NVarChar, 500).Value = partyaddress

        dcmd.CommandText = "sp_add_update_delete_party"
        dcmd.Transaction = tran
        dcmd.ExecuteNonQuery()
        tran.Commit()
        Return True
    Catch ex As Exception
        Return False
    Finally
        cn.Close()
    End Try
End Function

Key Value
Request POST /hemal/ASPNET/DPMT/Service/DatabaseHandling.asmx/SaveDataToParty HTTP/1.1
Accept  application/json, text/javascript, */*; q=0.01
Content-Type    application/json; charset=utf-8
X-Requested-With    XMLHttpRequest
Referer http://localhost/hemal/ASPNET/DPMT/ADMIN/Purchase_Add.aspx
Accept-Language en-IN,en-GB;q=0.8,en;q=0.5,gu;q=0.3
Accept-Encoding gzip, deflate
User-Agent  Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)
Host    localhost
Content-Length  0
DNT 1
Connection  Keep-Alive
Cache-Control   no-cache
Cookie  ASP.NET_SessionId=mhp35fbfn3vzoalqvdild5hb; loginstatus=ok