C# Ajax调用以将数据获取到highchart

我正在尝试使用每秒更新的highcharts制作样条曲线图。 数据来自数据库

我的剧本是：

cs代码为：

public partial class ajax_main_Testpages_Realtime_Graph_Default : System.Web.UI.Page
{
  [System.Web.Services.WebMethod()]
 public static string GetData()
 {
    String con1 = ConfigurationManager.ConnectionStrings["myConnectionString"].ToString();
    List<string> list_time = new List<string>();
    List<int> list_count = new List<int>();
    var serie_line_Dept = new { data = new List<object>() };
    string query = @"select item_count,entered_time p_time from st_request where rownum<=10";
    OdbcConnection connection = new OdbcConnection(con1);
    connection.Open();
    OdbcCommand cmdSelect = connection.CreateCommand();
    cmdSelect.CommandText = query;
    OdbcDataReader readerSelect = cmdSelect.ExecuteReader();
    while (readerSelect.Read())
    {
        serie_line_Dept.data.Add(new List<object>() { readerSelect["p_time"].ToString(), int.Parse(readerSelect["item_count"].ToString()) });

        list_time.Add(readerSelect["p_time"].ToString());
        list_count.Add(int.Parse(readerSelect["item_count"].ToString()));
    }
    JavaScriptSerializer oSerializer1 = new JavaScriptSerializer();
    return oSerializer1.Serialize(serie_line_Dept);
}
}

---

我得到了这个错误：在序列化之前做HTML编码的意外标记。你的意思是我需要这样做吗？返回HttpUtility.HtmlEncodeoSerializer1.serialize\u line\u Dept；你能帮我做这个吗首先，你试过调试这个吗？您在什么时候出错？我在控制台中没有发现错误。如果我注释行datatype:JSON，那么就没有错误，也没有图形。

public partial class ajax_main_Testpages_Realtime_Graph_Default : System.Web.UI.Page
{
  [System.Web.Services.WebMethod()]
 public static string GetData()
 {
    String con1 = ConfigurationManager.ConnectionStrings["myConnectionString"].ToString();
    List<string> list_time = new List<string>();
    List<int> list_count = new List<int>();
    var serie_line_Dept = new { data = new List<object>() };
    string query = @"select item_count,entered_time p_time from st_request where rownum<=10";
    OdbcConnection connection = new OdbcConnection(con1);
    connection.Open();
    OdbcCommand cmdSelect = connection.CreateCommand();
    cmdSelect.CommandText = query;
    OdbcDataReader readerSelect = cmdSelect.ExecuteReader();
    while (readerSelect.Read())
    {
        serie_line_Dept.data.Add(new List<object>() { readerSelect["p_time"].ToString(), int.Parse(readerSelect["item_count"].ToString()) });

        list_time.Add(readerSelect["p_time"].ToString());
        list_count.Add(int.Parse(readerSelect["item_count"].ToString()));
    }
    JavaScriptSerializer oSerializer1 = new JavaScriptSerializer();
    return oSerializer1.Serialize(serie_line_Dept);
}
}