一条关于Request is not available in this context的错误分析

yanghuabober 2016-01-26 02:33:57

情况是这样的：我做了一个医生用的查询的小程序，界面如下图：

前台通过Ajax去请求后台数据，发布到IIS6后，在点击提取数据时，ajax抛出如下错误：

但是程序在VS2010中运行调试都是成功的，发布到IIS6以后就不行了。
发布后的getUser()和getDept()都是通过上层框架（frame）的cookies获取的，出错后，一直没找到原因，请各位帮忙分析一下，谢谢！
贴上ajax代码

$(function () {

            $("#btnSubmit").click(function () {

                var sdata = $("#tb_sdate_1").val();

                var edate = $("#tb_edate_1").val();

                var vall = $("#Hidden1").val();

                $.ajax({

                    type: "POST",

                    url: "index.aspx/sendValue",

                    data: "{'va':'" + vall + "','sdate':'" + sdata + "','edate':'" + edate + "'}",

                    beforeSend: function () { $("#hidiv").show();},

                    contentType: "application/json; charset=utf-8",

                    dataType: "json",

                    success: function (data) {

                        var vstr = data.d

                        var strarr = new Array();

                        if (vstr != "") {

                            if (vstr.indexOf(",") > 0) {

                                strarr = vstr.split(",");

                            }

                            else {

                                strarr = new Array(vstr);

                            }

                        }

                        for (var t = 0; t < strarr.length; t++) {

                            var yu = strarr[t].split(":");

                            $('#' + yu[0]).html(yu[1]);

                        }

                        $("#hidiv").hide();

                        $("#head").width($(".td_Item:gt(0)").width());

                    },

                    error: function (XMLHttpRequest) {

                        alert(XMLHttpRequest.responseText);

                    }

                });

                return false; 

            });

        }

    );

后台sendvalue代码

[WebMethod]

        public static string sendValue(string va, string sdate, string edate)

        {

            string disp = va;

            string display = disp.LastIndexOf(",") != -1 ? disp.Substring(0, disp.LastIndexOf(",")) : "";

            string[] strarr = new string[] { };

            string vlues = "";

            if (display != "")

            {

                if (display.IndexOf(",") != -1)

                {

                    strarr = display.Split(',');

                }

                else

                {

                    strarr = new string[] { display };

                }

            }

            for (int i = 0; i < strarr.Length; i++)

            {

                vlues += strarr[i] + ":" + getDataByItem(strarr[i], sdate, edate, getDept()) + ",";

            }

            string values = vlues.IndexOf(",") != -1 ? vlues.Substring(0, vlues.LastIndexOf(",")) : vlues;

            return values;

        }

getDataByItem代码：

 public static string getDataByItem(string item_code, string sdate, string edate, string dept)

        {

            string sql = "select querysql from kssrfx where item_code='" + item_code + "'";

            DataTable dt = DataOper.getPlatData(sql).Tables[0];

            string datasql = dt.Rows[0][0].ToString();



            OracleConnection dconn = new OracleConnection(conn);

            OracleCommand cmd = new OracleCommand();

            try

            {

                dconn.Open();

                cmd.Connection = dconn;

                cmd.CommandText = datasql;

                OracleParameter op1 = new OracleParameter();

                op1.ParameterName = ":sdate";

                op1.Value = sdate;

                OracleParameter op2 = new OracleParameter();

                op2.ParameterName = ":edate";

                op2.Value = edate;

                OracleParameter op3 = new OracleParameter();

                op3.ParameterName = ":dept";

                op3.Value = dept;

                cmd.Parameters.Add(op1);

                cmd.Parameters.Add(op2);

                cmd.Parameters.Add(op3);



                OracleDataAdapter oda = new OracleDataAdapter();

                oda.SelectCommand = cmd;

                DataSet ds = new DataSet();

                oda.Fill(ds);

                dconn.Close();

                DataTable dt1 = ds.Tables[0];

                if (dt1.Rows.Count > 0)

                {

                    string backhtml = "<table class='autot' cellspacing='0' cellpadding='0'><tr>";

                    for (int k = 0; k < dt1.Columns.Count; k++)

                    {

                        backhtml += "<td>" + dt1.Columns[k].ColumnName + "</td>";

                    }

                    backhtml += "</tr>";

                    for (int i = 0; i < dt1.Rows.Count; i++)

                    {

                        backhtml += "<tr>";

                        for (int j = 0; j < dt1.Columns.Count; j++)

                        {

                            backhtml += "<td>" + dt1.Rows[i][j].ToString() + "</td>";

                        }

                        backhtml += "</tr>";

                    }

                    backhtml += "</table>";

                    return backhtml;

                }

                else

                    return "没有数据！";



            }

            catch (Exception r)

            {

                return "没有数据！";

            }

        }